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including the Saint Georges Respiratory Questionnaire &#40;SGRQ&#41;&#44; the Maugeri Foundation questionnaire &#40;MRF-26&#41;&#44; and the Severe Respiratory Insufficiency questionnaire &#40;SRI&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0225"><span class="elsevierStyleSup">5&#44;6&#44;8&#8211;16</span></a> The SRI questionnaire and the MRF-26 are commonly used in NIV trials to assess aspects of health-related quality of life&#59; however&#44; their length and complex scoring algorithms limit their use in everyday clinical practice&#46; Furthermore&#44; none of these questionnaires evaluate the treatment-related side effects of NIV&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">The S3-NIV questionnaire&#44; a specific patient-reported outcome measure &#40;PROM&#41; designed to monitor individuals treated with home NIV&#44; is a short&#44; reliable and easy-to-apply questionnaire&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">17</span></a> It measures respiratory symptoms&#44; sleep quality and NIV-related side effects&#46; English&#44; French&#44; Portuguese&#44; and Danish translations are available&#46;<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">17&#8211;19</span></a> The S3-NIV has been validated against other known questionnaires&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">17</span></a> Moreover&#44; S3-NIV scores have been reported for different disease groups&#46;<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">17&#44;18</span></a> However&#44; the full potential of the questionnaire to document individual clinical trajectories during follow-up of NIV treatment remains to be established&#46; Guerreiro et al&#46; established a minimal clinically important difference &#40;MCID&#41; using an anchor-based approach corresponding to hospitalizations for acute respiratory exacerbations&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">20</span></a> However&#44; these clinical events represent major alterations in health status&#46; When monitoring long-term NIV&#44; it is necessary to assess less dramatic changes&#44; such as the impact of a change in NIV settings&#44; interface&#44; additional humidification or initiation of supplemental oxygen&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Therefore&#44; the objectives of this study were to investigate factors associated with the time-course of the scores of &#40;1&#41; the total S3-NIV&#44; &#40;2&#41; its two domains&#44; and &#40;3&#41; its 11 items in a large cohort of individuals treated with long-term home nocturnal NIV&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Study design and participant selection</span><p id="par0020" class="elsevierStylePara elsevierViewall">The present work is a retrospective longitudinal analysis of data from a cohort of people with chronic respiratory failure treated at home with long-term&#44; nocturnal&#44; noninvasive ventilation &#40;NIV&#41; who underwent regular assessment between February 2019 and May 2023&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Potential participants were identified through a regional home-care provider database &#40;AGIR &#224; dom&#41;&#46; AGIR &#224; dom provides NIV treatment to over 3000 individuals in France&#44; which corresponds to 3 out of every 100 people treated with NIV nationwide&#46;<a class="elsevierStyleCrossRefs" href="#bib0305"><span class="elsevierStyleSup">21&#44;22</span></a> The inclusion criteria were being aged<span class="elsevierStyleHsp" style=""></span>&#8805;<span class="elsevierStyleHsp" style=""></span>18 years and having completed the S3-NIV questionnaire during a home follow-up visit&#46; Non Inclusion criteria were&#58; &#40;1&#41; NIV prescription for &#62;12<span class="elsevierStyleHsp" style=""></span>h&#47;day &#40;to exclude diurnal use of NIV at the beginning of the study&#41;&#59; &#40;2&#41; use of the volumetric mode for the small size of this group &#40;0&#46;16&#37; of the cohort&#41;&#59; &#40;3&#41; use of adaptive servo-ventilation &#40;ASV&#41; mode&#44; mainly reserved for patients with central or mixed sleep apnoea syndromes&#44; but not necessarily chronic respiratory failures&#59; and &#40;4&#41; no agreement for the use of their personal data&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The study was carried out in accordance with the European General Protection Regulation &#40;EGPR&#41; and the reference methodology &#40;MR004&#41; of the French information technology and personal data protection authority &#40;Commission Nationale Informatique et Libert&#233; &#40;C&#46;N&#46;I&#46;L&#41;&#41;&#46; Before starting the study&#44; a research protocol was drawn up and submitted to the Health-Data-Hub&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">23</span></a> An information letter was mailed to all potential participants to provide them with the opportunity to object to the use of their data&#46; This study is reported according to the STrengthening the Reporting of OBservational studies in Epidemiology &#40;STROBE&#41; recommendations&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">24</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Data collection</span><p id="par0035" class="elsevierStylePara elsevierViewall">The following data were retrospectively collected from the homecare provider&#39;s database&#58; age&#44; sex&#44; anthropometrics&#44; type of respiratory condition&#44; time elapsed since NIV initiation&#44; NIV settings&#44; supplemental oxygen therapy&#44; adherence &#40;from the device&#39;s built-in time counters&#41;&#44; and type of interface and S3-NIV scores&#46; For each participant&#44; the first measurement time-point was the date of completion of the first S3-NIV questionnaire&#46; In France&#44; the health authority requires that the home care provider&#39;s nurses or technicians visit the individual every three to four months until death or NIV discontinuation&#46; Data for each participant were therefore updated and the S3-NIV questionnaire was completed at each visit&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">S3-NIV questionnaire</span><p id="par0040" class="elsevierStylePara elsevierViewall">The S3-NIV questionnaire has 11 items&#46; Each item is scored using a 5-point Likert scale from &#8220;always true&#8221; to &#8220;never true&#8221;&#46; The overall S3-NIV score is the average of all items multiplied by 2&#46;5&#46; The S3-NIV evaluates two domains&#58; &#8220;respiratory symptoms&#8221; and &#8220;sleep &#38; side effects&#8221;&#46; The score for the first domain is the average score of items 1&#44; 4&#44; 5&#44; 6 and 7 multiplied by 2&#46;5&#59; the score for the latter domain is the average score of items 2&#44; 3&#44; 8&#44; 9&#44; 10 and 11 multiplied by 2&#46;5&#46; The total score and the two sub scores range from 0 to 10 points&#46; Lower scores represent a higher&#44; negative impact of the disease and NIV on the individual&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Statistical analysis</span><p id="par0045" class="elsevierStylePara elsevierViewall">Quantitative variables are described by the median and quartiles&#44; and categorical variables by the frequency and percentage&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">The time-course of the S3-NIV score and its two domains were modeled using multivariate linear mixed effect models&#46; Before creating the models&#44; we assessed the distribution of scores graphically and using the Kolmogorov&#8211;Smirnov test&#46; All three models included Individual random effects for both the intercept and the slope&#46; A likelihood ratio test showed that the models with a random-effect of time fitted better than the non-random-effect models &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;0001&#41;&#46; Time since initiation of treatment&#44; number of provider visits between two visits during which the S3-NIV was completed&#44; sex&#44; age&#44; BMI&#44; type of respiratory condition&#44; type of Interface&#44; adherence &#40;hours&#47;day&#41;&#44; oxygen therapy&#44; pressure support and back-up rate were included as fixed effects&#46; <a class="elsevierStyleCrossRef" href="#sec0070">Fig&#46; E1</a> shows an example of the longitudinal follow up of a participant&#46; We chose to include all variables&#44; even those with non-significant effects&#44; to compare their effect on the total score and the sub-scores under the same conditions&#46; No collinearity was detected among the variables that could potentially influence the results&#46; Assessment of residuals confirmed the quality of the three models&#46; Although the sample size has not been calculated&#44; we conducted a post hoc calculation of the statistical power of the study for the equivalence test between the initial and the final S3-NIV scores&#46;it had been estimated to be 0&#46;99 for 2135 participants&#44; considering a minimal clinically significant difference in S3-NIV score from 0&#46;6 to 1&#46;02&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">20</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">The change in S3-NIV item scores over time was modeled using a mixed effect multivariable multinomial ordinal regression because of the discrete&#44; ordinal&#44; non-normal distribution of the scores&#46; All item models also included Individual random effects for both the intercept and the slope&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Before statistical analysis&#44; we used intra class correlation &#40;ICC&#41; to check that there were no significant intra-participant changes for the predictor variables&#58; BMI&#44; pressure support&#44; PEP&#44; and back-up rate&#46; Missing data for those variables were imputed from the last records &#40;last observation carried forward&#41;&#46; Following the imputation&#44; records with remaining missing values were excluded &#40;<a class="elsevierStyleCrossRef" href="#sec0070">Appendix A&#44; Supplementary results</a>&#41;&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Statistical computations were performed with SAS for Windows&#44; Version 9&#46;4&#46; <span class="elsevierStyleItalic">p</span>-Values<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05 were considered significant&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Participants</span><p id="par0070" class="elsevierStylePara elsevierViewall">Study flow chart is depicted in <a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 1</a>&#46; The median &#40;IQR&#41; follow-up duration was 2 years &#40;10 months&#8211;3 years&#41; with a median of 5 &#40;3&#8211;7&#41; completed S3-NIV questionnaires per individual&#46; Median time between completions of each S3-NIV questionnaire was 4 months &#40;3&#8211;6 months&#41;&#46; 595 &#40;28&#37;&#41; participants died during the follow-up&#59; 153 &#40;7&#37;&#41; participants were of lost to follow-up&#46; The reason for their drop-out was not reported&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0075" class="elsevierStylePara elsevierViewall">Participants&#8217; baseline characteristics are presented in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46; The two most frequent respiratory conditions for which NIV was prescribed were obesity hypoventilation syndrome &#40;OHS&#41; and chronic obstructive pulmonary disease &#40;COPD&#41;&#46; At inclusion&#44; these participants had been treated with NIV for a median &#40;IQR&#41; duration of 3 years &#40;7 months&#8211;7 years&#41; with a median NIV adherence of 7&#46;9<span class="elsevierStyleHsp" style=""></span>h &#40;5&#46;6&#8211;10<span class="elsevierStyleHsp" style=""></span>h&#47;day&#41;&#46; Median S3-NIV score was 7&#46;9 &#40;6&#46;4&#8211;8&#46;6&#41;&#44; with a median respiratory domain score of 6&#46;5 &#40;5&#46;0&#8211;8&#46;5&#41; and a median sleep and side effects domain score of 8&#46;3 &#40;7&#46;1&#8211;9&#46;2&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">Analysis of change in total S3-NIV&#44; respiratory symptoms domain and sleep and side effects domain scores over time</p><p id="par0085" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 2</a> &#40;and <a class="elsevierStyleCrossRef" href="#sec0070">Table S1</a>&#41; shows the variables independently associated with changes in the total score and the two S3-NIV domains&#46; S3-NIV total score was lower for female than male participants over time &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;238&#44; 95&#37; CI&#58; &#8722;0&#46;344&#59; &#8722;0&#46;132&#41;&#44; this was the case for both domain scores &#40;respiratory symptoms&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;176&#44; sleep and side effects&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;268&#41;&#46; Older age was associated with lower respiratory symptom scores over time &#40;for each additional 10 years&#44; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;045 95&#37; CI&#58; &#8722;0&#46;085&#59; &#8722;0&#46;005&#41;&#46; BMI was not significantly associated with changes in S3-NIV total score or the domain scores&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">S3-NIV total score improved over time for the whole group &#40;for each additional 4 months&#44; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;041 95&#37; CI&#58; 0&#46;032&#59; 0&#46;050&#41;&#46; The S3-NIV improvement was mainly associated with positive changes in the sleep and NIV side effects domain &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41; but not the respiratory symptoms domain &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;132&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 3</a>&#41;&#46; Time elapsed since initiation of NIV at baseline was also associated with improvement in S3-NIV total score &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;035 95&#37; CI&#58; 0&#46;024&#59; 0&#46;046&#41; and the scores of both domains &#40;respiratory symptoms&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;039&#44; sleep and side effects&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;026&#41; over time&#46; Daily adherence was not significantly associated with change in total S3-NIV score over time &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;309&#41;&#44; but was associated with a better sleep and NIV side effects score &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;017 95&#37; CI&#58; 0&#46;008&#59; 0&#46;025&#41; and a poorer respiratory symptoms score &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;027 95&#37; CI&#58; &#8722;0&#46;038&#59; &#8722;0&#46;017&#41;&#46;</p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">In comparison to participants with OHS&#44; participants with COPD or other respiratory diseases had significantly lower S3-NIV scores over time &#40;COPD vs OHS&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;294 95&#37; CI&#58; &#8722;0&#46;441&#59; &#8722;0&#46;146&#44; COPD vs OHS&#58; <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;256 95&#37; CI&#58; &#8722;0&#46;458&#59; &#8722;0&#46;054&#41;&#46; These differences were associated with a lower respiratory symptoms score&#44; since sleep and NIV related side effects scores did not differ significantly between pathologies&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">Participants who used face masks had lower scores over time than those who used nasal&#47;nasal pillow masks &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;210&#44; 95&#37; CI&#58; &#8722;0&#46;097&#59; &#8722;0&#46;324&#41;&#46; Participants who used additional oxygen therapy also had lower scores over time than those who did not &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;337 95&#37; CI&#58; &#8722;0&#46;431&#59; &#8722;0&#46;242&#41;&#46; With regard to NIV settings&#44; higher positive end-expiratory pressure was positively associated with change in S3-NIV total score &#40;for each additional 2<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;06 95&#37; CI&#58; 0&#46;013&#59; 0&#46;01&#41; and with change in the respiratory symptoms domain score &#40;for each additional 2<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;114 95&#37; CI&#58; 0&#46;049&#59; 0&#46;179&#41; over time&#46; Conversely&#44; higher levels of pressure support were associated with lower S3-NIV total scores &#40;for each additional 2<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O <span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;036 95&#37; CI&#58; &#8722;0&#46;070&#59; &#8722;0&#46;002&#41; and lower sleep and NIV related side effect domain scores &#40;meaning more adverse effects and poorer sleep&#41; over time&#46; Participants provided with humidifier had lower S3-NIV scores over time &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;072 95&#37; CI&#58; &#8722;0&#46;137&#59; &#8722;0&#46;008&#41;&#44; which is mainly due to having more side effects &#40;<span class="elsevierStyleItalic">&#946;</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#8722;0&#46;119 95&#37; CI&#58; &#8722;0&#46;187&#59; &#8722;0&#46;050&#41;&#46; The later the changes in NIV settings occurred in the participants&#8217; follow-up&#44; the lower the evolution of the S3-NIV total score over time&#46; This was mainly due to poorer sleep quality and greater adverse effects&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Although the main linear model of the S3-NIV total-score-change over time was adjusted for time since NIV initiation&#44; we performed a sensitivity analysis for participants who had been on NIV for less than a year&#46; The model &#40;<a class="elsevierStyleCrossRef" href="#sec0070">Figure Supplement 01</a>&#41; was fairly similar to the main model &#40;including all participants&#41; except for the effect of type of interface&#46; The nasal mask did not appear to be associated with a more positive change of the S3-NIV score than the face mask&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Analysis of changes in S3-NIV individual item scores over time</span><p id="par0110" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0025">Fig&#46; 4</a> &#40;and <a class="elsevierStyleCrossRef" href="#sec0070">Table S2 supplement</a>&#41; shows the impact of the main NIV settings&#44; type of interface&#44; adherence&#44; the presence of humidifier and additional oxygen therapy on changes in the scores of the 11 items of the S3-NIV questionnaire&#46;</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia><p id="par0115" class="elsevierStylePara elsevierViewall">After controlling for confounding variables&#44; perceiving too much air&#44; or experiencing discomfort with the mask was less likely to occur over time in participants with higher levels of adherence&#46; Participants with higher adherence levels were more likely to experience more respiratory symptoms over time&#44; except for mucus in the airways&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">In contrast&#44; participants who required higher levels of pressure support were more likely to report NIV related side effects&#44; including nasal and oral dryness&#44; perceiving too much air&#44; being disturbed by leaks&#44; and waking up at night with breathing difficulties over time&#46; However&#44; participants with a higher NIV back up rate were less likely to experience mucus in their airways&#44; have trouble breathing when they speak and shortness of breath&#46; They were also less likely to report receiving too much air or waking up at night with breathing difficulties&#46; Additionally&#44; participants who used higher values of PEP were less likely to experience respiratory symptoms and sleep problems&#44; however they were more likely to report being disturbed by leaks&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">Dryness&#44; mask discomfort&#44; disturbing leaks&#44; and waking-up during the night were less likely side-effects for participants who used a nasal mask or nasal pillows than for those who used a face mask&#46; They were also less likely to report shortness of breath or problems breathing when speaking or eating&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Participants who had a humidifier were more likely to report complaints of dryness&#44; mask discomfort&#44; disturbing leaks&#44; and mucus in airways&#46; Participants who had additional oxygen therapy were more likely to report more respiratory symptoms &#40;all those included in S3-NIV&#41;&#44; poorer sleep and more NIV side-effects&#44; except for the perception of disturbing leaks&#46;</p></span></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discussion</span><p id="par0135" class="elsevierStylePara elsevierViewall">This study used longitudinal data &#40;up to two years&#41; from a large cohort of individuals undergoing home NIV to identify independent factors associated with changes in S3-NIV scores over time&#46; The type of respiratory condition&#44; sex&#44; age and time elapsed since initiation of NIV was associated with changes in the time-course of the S3-NIV score&#46; Daily NIV adherence level was not associated with a significant change in the S3-NIV total score over time&#59; however&#44; it was associated with poorer respiratory symptoms and improvement in sleep and NIV related side effects over time&#46; Pressure support was associated with a lower total score over time&#44; mainly because side effects increased over time&#46; The use of a face mask &#40;rather than a nasal mask&#41; was associated with a lower S3-NIV total score&#44; with more respiratory symptoms and more side effects over time&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">Analysis of the two S3-NIV domain scores provides a more precise interpretation of the time-course of individuals&#8217; symptoms and their perceptions of NIV treatment than analysis of the total score alone&#46; One of the main aims of NIV is to improve the quality of life of people with chronic respiratory failure&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">4&#44;6&#44;25</span></a> Longer NIV daily adherence time is generally considered to be associated with better clinical outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">26</span></a> However&#44; in the long-term&#44; this association may be complex to interpret&#44; as heavy use of NIV may be associated with a poor prognosis<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">27</span></a> or an increase in respiratory symptoms&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">28</span></a> Our results reflect this mechanism&#58; in the presence of severe symptoms&#44; people may increase their use of NIV to relieve the symptoms&#46; However&#44; if they experience considerable side effects&#44; people also reduce their use of NIV&#46; The perception of receiving too much air or mask discomfort are associated with a risk of reduced NIV use&#44; in contrast with the perception of being disturbed by leaks&#44; which is not associated with NIV use&#46; Although the link between leaks perception and non-adherence to continuous positive airway pressure &#40;CPAP&#41; therapy is well-documented in obstructive sleep apnea&#44;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">29</span></a> this association warrants further investigation for NIV&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">30</span></a></p><p id="par0145" class="elsevierStylePara elsevierViewall">The perception of being disturbed by leaks is&#44; however&#44; associated with the level of pressure support&#44; as are the perception of receiving too much air&#44; nasal or oral dryness and waking up with breathing difficulties&#46; Providing sufficient pressure support is obviously essential to reduce hypoventilation&#44; although our results show that pressure support has a considerable impact on NIV-related side effects&#46; Moderation of the level of pressure support can sometimes reduce side effects without reducing the positive impact of the ventilation on hypoventilation&#46;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">31&#44;32</span></a></p><p id="par0150" class="elsevierStylePara elsevierViewall">In contrast with CPAP treatment for sleep apnea syndrome&#44; in which nasal masks are the interface of choice&#44; for NIV&#44; oronasal masks are the most frequently used&#46; Around 60&#37; of people with a thoracic-disease or neuro-muscular disorder and over 80&#37; of people with OHS or COPD use an oronasal mask with NIV&#46;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">26&#44;33</span></a> The reasons for this interface choice in NIV have been sparsely documented&#46; However&#44; our findings suggest that nasal masks are used in the case of mild to moderate respiratory symptoms and are associated with fewer side effects than oronasal masks&#46; However&#44; this was not the case for participants treated for less than a year &#40;sensitivity analysis <a class="elsevierStyleCrossRef" href="#sec0070">Fig&#46; S01</a>&#41;&#46; A meta-analysis found that people who were fitted with an oronasal mask had more pronounced alveolar hypoventilation at NIV initiation&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">33</span></a> This link between mask type and treatment failure has also been found for CPAP&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">34</span></a> Further research is needed to better rationalize the selection of the interface for NIV&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">The proportion of NIV users who have supplemental oxygen therapy varies from one publication to another&#46; Our results show a proportion close to that of another French<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">35</span></a> and a Swiss cohort&#44;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">1</span></a> but higher than that of an English cohort&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">35</span></a> In our study&#44; supplemental oxygen therapy was associated with smaller improvements in patient-reported outcomes&#44; with an increase in all symptoms and side effects&#44; except for the perception of leaks&#46; Although the perception of an increase in airway dryness is an expected side effect&#44; the perception of receiving too much air or mask discomfort deserves further investigation&#46; The worsening of all respiratory symptoms over time in those under oxygen supplementation most probably highlights the severity of the disease in this group&#59; however&#44; although oxygen therapy is an essential treatment for severe chronic hypoxemia&#44;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">36</span></a> it is not clearly recommended for moderate hypoxemia with nocturnal or exercise-induced desaturation<a class="elsevierStyleCrossRefs" href="#bib0385"><span class="elsevierStyleSup">37&#8211;39</span></a>&#59; nearly 20&#37; of people may receive oxygen therapy despite not fulfilling the criteria for its prescription&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">40</span></a> Unfortunately&#44; in this study we had no information on blood gases or the reason for prescribing O<span class="elsevierStyleInf">2</span> to confirm the appropriateness of this treatment&#44; which is a major limitation of this study&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">This study has several other limitations&#46; First&#44; the data were collected from a homecare provider database&#46; This database lacks important clinical data that are likely to be related to the change in S3-NIV score including comorbidities&#44; medical treatments&#44; respiratory function&#44; blood gases&#44; or rate of exacerbations&#59; furthermore&#44; The type of respiratory condition that led to the prescription of NIV was mainly administrative &#40;main etiology reported by the physician&#41; with a risk of overlap with other diseases&#46; Second&#44; this study included both people who had recently begun NIV and long-term users&#46; However&#44; we adjusted for time elapsed since NIV initiation&#46; Finally&#44; the modeling of change in the S3-NIV score was conducted with a median follow-up period of only 2 years&#46; A longer follow-up period could potentially enable the identification of other variables that might significantly influence changes in the S3-NIV score over time&#46; It may also possibly reveal different score evolutions according to the type of respiratory condition&#46; However&#44; in the present model&#44; we did not find any significant interaction between type of respiratory condition and adherence&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conclusion and perspectives</span><p id="par0165" class="elsevierStylePara elsevierViewall">This study showed that the time-course of the S3-NIV score depends on both the individual&#39;s characteristics and the NIV settings&#46; Use of the S3-NIV in clinical practice with separate analysis of the two domains &#8220;respiratory symptoms&#8221; and &#8220;sleep-adverse effects&#8221; and of the individual items of the S3-NIV could increase understanding of the difficulties experienced by people on NIV and could serve as a clinical anchor for creating useful alerts with a view to remote monitoring of NIV data&#46;</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Funding</span><p id="par0170" class="elsevierStylePara elsevierViewall">SB and JLP are supported by the <span class="elsevierStyleGrantSponsor" id="gs1">French National Research Agency</span> in the framework of the &#8220;Investissements d&#8217;avenir&#8221; program &#40;<span class="elsevierStyleGrantNumber" refid="gs1">ANR-15-IDEX-02</span>&#41; and the &#8220;e-health and integrated care and trajectories medicine&#8221; from the <span class="elsevierStyleGrantSponsor" id="gs2">Grenoble Alpes University Foundation</span>&#44; and <span class="elsevierStyleGrantSponsor" id="gs3">&#8220;MIAI artificial intelligence&#8221;</span> Chairs of excellence &#40;<span class="elsevierStyleGrantNumber" refid="gs3">ANR-19-P3IA-0003</span>&#41;&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Convention Industrielle de Formation par la Recherche &#40;CIFRE&#41; n&#176; 2022&#47;1389 agreement between l&#8217;Association Nationale de la Recherche Technique &#40;ANRT&#41; et Agir &#224; Dom&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conflict of interest</span><p id="par0180" class="elsevierStylePara elsevierViewall">JC Borel&#44; M Lefouili&#44; N Arnol&#44; S Journet&#44; P Chauderon are employees of AGIR &#224; Dom&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">Since the initial planning of the work JL P&#233;pin received funding from Air Liquide Foundation&#44; Agiradom&#44; AstraZeneca&#44; Fisher and Paykel&#44; Mutualia&#44; Philips&#44; Resmed&#44; Vitalaire&#46; JL P&#233;pin also received consulting fees from&#58; Agiradom&#44; AstraZeneca&#44; Boehringer&#44; Ingelheim&#44; Jazz pharmaceutical&#44; Night Balance&#44; Philips&#44; Resmed&#44; Sefam&#46;</p></span></span>"
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          "titulo" => "Keywords"
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          "titulo" => "Abbreviations"
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              "identificador" => "sec0020"
              "titulo" => "Data collection"
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              "identificador" => "sec0025"
              "titulo" => "S3-NIV questionnaire"
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              "titulo" => "Statistical analysis"
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              "titulo" => "Analysis of changes in S3-NIV individual item scores over time"
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          "titulo" => "References"
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    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2024-02-05"
    "fechaAceptado" => "2024-05-11"
    "PalabrasClave" => array:1 [
      "en" => array:2 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec1856952"
          "palabras" => array:3 [
            0 => "Noninvasive ventilation"
            1 => "Patient reported outcome measures"
            2 => "Respiratory insufficiency"
          ]
        ]
        1 => array:4 [
          "clase" => "abr"
          "titulo" => "Abbreviations"
          "identificador" => "xpalclavsec1856953"
          "palabras" => array:12 [
            0 => "ASV"
            1 => "BMI"
            2 => "BURR"
            3 => "COPD"
            4 => "CRF"
            5 => "PEP"
            6 => "HRQoL"
            7 => "IQR"
            8 => "NIV"
            9 => "OHS"
            10 => "OR"
            11 => "SD"
          ]
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    "resumen" => array:1 [
      "en" => array:3 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Introduction</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Monitoring changes in symptoms over time during long-term nocturnal home non-invasive ventilation &#40;NIV&#41; using patient-reported outcome measures is crucial&#46; This study aimed to identify factors associated with changes in the S3-NIV total score&#44; its two domains &#40;&#8220;respiratory symptoms&#8221; and &#8220;sleep and NIV-related side effects&#8221;&#41; and individual item responses&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">We conducted a retrospective&#44; longitudinal data analysis of a cohort of adults with chronic respiratory failure treated with NIV&#46; Data were obtained from a French homecare provider&#46; Multivariate linear and multinomial ordinal mixed effect models were used to identify factors associated with changes in S3-NIV scores over time&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Median follow-up was 2 years for 2135 participants&#46; Each participant completed a median of five S3-NIV questionnaires&#59; totaling 11&#44;359 analyzed questionnaires&#46; Type of respiratory condition&#44; sex&#44; age and time since NIV initiation were associated with change in S3-NIV score over time&#46; NIV adherence was not associated with total S3-NIV score but high adherence was associated with more severe respiratory symptoms and an improvement in sleep and NIV-related side effects during the follow-up&#46; Intensity of pressure support was associated with a lower total S3-NIV score and more side effects&#46; Face masks and supplemental oxygen were associated with a lower S3-NIV total score&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusion</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Changes in S3-NIV scores over time are associated with the individual&#39;s characteristics and NIV settings&#46; Analysis of the two domains and individual items of the S3-NIV could increase understanding of the difficulties experienced by people on NIV&#46;</p></span>"
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            "apendice" => "<p id="par0195" class="elsevierStylePara elsevierViewall">The following are the supplementary data to this article&#58;<elsevierMultimedia ident="upi0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia></p>"
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          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Study flow&#46;</p>"
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          "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Effects Coefficients and Confidence Intervals of predictor variables on the S3-NIV Scores and the two domain scores&#58; respiratory symptoms domain and sleep and side effects domain in multivariate Linear Mixed-Effect Models&#46; COPD&#58; Chronic obstructive pulmonary disease&#44; OHS&#58; Obesity hypoventilation syndrome&#44; PEP&#58; positive expiratory pressure&#46;</p>"
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          "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Estimated changes in S3-NIV&#44; respiratory symptoms domain and sleep and side effects domain scores over time from the multivariate linear mixed effect models&#46;</p>"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Odds ratio estimates of the variables in the mixed effect multivariable multinomial ordinal models of the 11 items of the S3-NIV questionnaire&#46; &#40;A&#41; Variables Interface&#44; supplemental oxygen and humidifier &#40;B&#41; Variables Adherence&#44; pressure support&#44; back up rate and positive expiratory pressure&#46;</p>"
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          "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">OHS&#58; obesity hypoventilation syndrome&#59; COPD&#58; chronic obstructive pulmonary diseases&#59; CPM&#58; cycle per minute&#59; NIV&#58; noninvasive ventilation&#59; PEP&#58; positive expiratory pressure&#46;</p>"
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                  \t\t\t\t">1099 &#40;51&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">70&#46;0 &#40;61&#46;2&#44; 77&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Body-mass index &#40;kg&#47;m</span><span class="elsevierStyleSup"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">&#41;</span>&nbsp;\t\t\t\t\t\t\n
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Vol. 60. Issue 8.
Pages 483-489 (August 2024)
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Vol. 60. Issue 8.
Pages 483-489 (August 2024)
Original Article
Factors Associated With Change in S3-NIV Score Over Time in People With Chronic Respiratory Failure Treated With Long-Term Home Noninvasive Ventilation
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Messaoud Lefouilia,b, Nathalie Arnolb, Sandra Journetb, Pascal Chauderonb, Dan Adlerd, Jean-Paul Janssense, Jean-Louis Pépina,c, Sébastien Baillya,c,1, Jean Christian Borelb,1,
Corresponding author
j.borel@agiradom.com

Corresponding author.
a HP2 Laboratory, INSERM U1300, University Grenoble Alpes, Grenoble 38000, France
b AGIR à dom, Homecare Charity, Meylan 38240, France
c EFCR Laboratory, Grenoble Alpes University Hospital, Grenoble 38000, France
d Division of Lung Diseases, Hôpital de la Tour, 1217 Meyrin, Geneva, Switzerland
e Cardio-Respiratory Center, Hôpital de la Tour, 1217 Meyrin, Geneva, Switzerland
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Table 1. Baseline characteristics of participants.
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Abstract
Introduction

Monitoring changes in symptoms over time during long-term nocturnal home non-invasive ventilation (NIV) using patient-reported outcome measures is crucial. This study aimed to identify factors associated with changes in the S3-NIV total score, its two domains (“respiratory symptoms” and “sleep and NIV-related side effects”) and individual item responses.

Methods

We conducted a retrospective, longitudinal data analysis of a cohort of adults with chronic respiratory failure treated with NIV. Data were obtained from a French homecare provider. Multivariate linear and multinomial ordinal mixed effect models were used to identify factors associated with changes in S3-NIV scores over time.

Results

Median follow-up was 2 years for 2135 participants. Each participant completed a median of five S3-NIV questionnaires; totaling 11,359 analyzed questionnaires. Type of respiratory condition, sex, age and time since NIV initiation were associated with change in S3-NIV score over time. NIV adherence was not associated with total S3-NIV score but high adherence was associated with more severe respiratory symptoms and an improvement in sleep and NIV-related side effects during the follow-up. Intensity of pressure support was associated with a lower total S3-NIV score and more side effects. Face masks and supplemental oxygen were associated with a lower S3-NIV total score.

Conclusion

Changes in S3-NIV scores over time are associated with the individual's characteristics and NIV settings. Analysis of the two domains and individual items of the S3-NIV could increase understanding of the difficulties experienced by people on NIV.

Keywords:
Noninvasive ventilation
Patient reported outcome measures
Respiratory insufficiency
Abbreviations:
ASV
BMI
BURR
COPD
CRF
PEP
HRQoL
IQR
NIV
OHS
OR
SD

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