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        "resumen" => "<span class="elsevierStyleSectionTitle">OBJECTIVE</span><p class="elsevierStyleSimplePara elsevierViewall">To evaluate the discriminative properties and validity of the Airways Questionnaire 20 &#40;AQ20&#41; in a sample of airway obstructed patients and to compare its properties with those of the St George&#39;s Respiratory Questionnaire &#40;SGRQ&#41; and the Short Form 36 &#40;SF-36&#41;&#46;</p> <span class="elsevierStyleSectionTitle">PATIENTS AND METHODS</span><p class="elsevierStyleSimplePara elsevierViewall">A convenience sample of 47 subjects was recruited from among 61 consecutive patients referred to an outpatient clinic specialized in airway obstructive diseases&#46; All subjects completed the AQ20&#44; SGRQ&#44; and SF-36&#46; Other measures were the baseline dyspnea index &#40;BDI&#41;&#44;6-minute walk test &#40;6MWT&#41; distance&#44; spirometry&#44; results of arterial blood gas analysis&#44; and body mass index&#46;</p> <span class="elsevierStyleSectionTitle">RESULTS</span><p class="elsevierStyleSimplePara elsevierViewall">The AQ20 showed very good correlation with the SGRQ total score &#40;&#961; &#61; 0&#46;84&#44; P &#60; &#46;001&#41; and moderate correlation with all SF-36 domains &#40;physical capacity&#44; &#961; &#61; &#8722;0&#46;53&#59;physical functioning&#44;&#961; &#61; &#8722;0&#46;61&#59;bodily pain&#44; &#961; &#61; &#8722;0&#46;55&#59;general health&#44;&#961; &#61; &#8722;0&#46;59&#59;vitality&#44;&#961; &#61; &#8722; 0&#46;55&#59;&#59;social functioning&#44;&#961; &#61; &#8722;0&#46;57&#59; emotional role functioning&#44;&#961; &#61; &#8722;0&#46;51&#59; mental health&#44;&#961; &#61; &#8722;0&#46;61&#59;all P &#60; &#46;001&#41;&#46;The BDI and the 6MWT were the best predictors of AQ20 score &#40;r<span class="elsevierStyleSup">2</span> &#61; 0&#46;31&#41; in the regression model&#46; An area under the receiver operating characteristic curve of 0&#46;91 &#40;P &#60; &#46;001&#41; indicated a high level of accuracy for the AQ20&#44; using the SGRQ as the gold standard&#46;</p> <span class="elsevierStyleSectionTitle">CONCLUSION</span><p class="elsevierStyleSimplePara elsevierViewall">This study shows that the AQ20 is an accurate health status questionnaire in patients with moderate-to-severe airway obstruction&#46; It could be an alternative to longer&#44; traditional questionnaires such as the SGRQ&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">OBJETIVO</span><p class="elsevierStyleSimplePara elsevierViewall">Evaluar las propiedades discriminativas y la validez del cuestionario Airways Questionnaire 20 &#40;AQ20&#41; en un grupo de pacientes con cuadros de obstrucci&#243;n de la v&#237;a respiratoria&#44; y comparar sus propiedades con las de los cuestionarios St&#46; George&#39;s Respiratory Questionnaire &#40;SGRQ&#41; y Short Form 36 &#40;SF-36&#41;&#46;</p> <span class="elsevierStyleSectionTitle">PACIENTES Y M&#201;TODOS</span><p class="elsevierStyleSimplePara elsevierViewall">De un grupo de 61 pacientes consecutivos&#44; remitidos a una consulta ambulatoria especializada en enfermedades obstructivas de la v&#237;a respiratoria&#44; se seleccion&#243; una muestra de conveniencia constituida por 47 pacientes&#46; Todos los pacientes completaron los cuestionarios AQ20&#44; SGRQ y SF-36&#46;Otros par&#225;metros evaluados fueron el &#237;ndice de disnea basal&#44; la distancia recorrida en la prueba de la marcha de 6 min&#44; los resultados de la gasometr&#237;a en sangre arterial y el &#237;ndice de masa corporal&#46;</p> <span class="elsevierStyleSectionTitle">RESULTADOS</span><p class="elsevierStyleSimplePara elsevierViewall">El cuestionario AQ20 present&#243; una correlaci&#243;n estrecha con la puntuaci&#243;n del SGRQ total &#40;&#961;&#61;0&#44;84&#59; p &#60; 0&#44;001&#41; y una correlaci&#243;n moderada con todos los dominios del SF-36 &#40;capacidad f&#237;sica&#44;&#961;&#61;&#8722;0&#44;53&#59;actividad f&#237;sica&#44; &#961;&#61;&#8722;0&#44;61&#59;dolor corporal&#44;&#961;&#61;&#8722;0&#44;55&#59;salud general&#44;&#961;&#61;&#8722;0&#44;59&#59; vitalidad&#44;&#961;&#61;&#8722;0&#44;55&#59;actividad social&#44;&#961;&#61;&#8722;0&#44;57&#59;actividad de rol emocional&#44;&#961;&#61;&#8722;0&#44;51&#59;salud mental&#44;&#961;&#61;&#8722;0&#44;61&#59;en todos los casos&#44; p &#60; 0&#44;001&#41;&#46;El &#237;ndice de disnea basal y la distancia recorrida en la prueba de la marcha de 6 min fueron los mejores elementos predictivos de la puntuaci&#243;n del AQ20 &#40;r<span class="elsevierStyleSup">2</span> &#61; 0&#44;31&#41; en el modelo de regresi&#243;n&#46; El &#225;rea bajo la curva de eficacia diagn&#243;stica&#44; que fue de 0&#44;91 &#40;p &#60; 0&#44;001&#41;&#44; indic&#243; un elevado grado de precisi&#243;n del cuestionario AQ20&#44; utilizando como prueba de referencia el SGRQ&#46;</p> <span class="elsevierStyleSectionTitle">CONCLUSIONES</span><p class="elsevierStyleSimplePara elsevierViewall">Los resultados obtenidos en este estudio demuestran que el AQ20 es un cuestionario preciso de salud en los pacientes con obstrucci&#243;n de la v&#237;a respiratoria de grado moderado a intenso&#46; Podr&#237;a constituir una alternativa a los cuestionarios tradicionales m&#225;s complejos&#44; como el SGRQ&#46;</p>"
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Vol. 43. Issue 12.
Pages 662-668 (January 2007)
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Vol. 43. Issue 12.
Pages 662-668 (January 2007)
ORIGINAL ARTICLES
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Discriminative Properties and Validity of a Health Status Questionnaire in Obstructive Airway Disease Patients: The Airways Questionnaire 20
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Aquiles Cameliera,
Corresponding author
aquilescamelier@yahoo.com.br

Correspondence: Dr. A. Camelier. Respiratory Division, Universidade Federal da Bahia. Rua Manoel Andrade, 201; Ap. 401, Pituba Ville. Salvador, Ba. Brazil, ZIP 41810-815
, Fernanda W. Rosab, Oliver A. Nascimentoc, Ana Luiza G. Fernandesc, Jose R. Jardimc
a Respiratory Division, Faculdade de Tecnologia e Ciências (FTC), Universidade Federal da Bahia, Salvador, Bahia, Brazil
b Faculdade de Tecnologia e Ciências (FTC), Universidade Católica do Salvador, Universidade Estadual da Bahia (UNEB), Salvador, Bahia, Brazil
c Respiratory Division. Universidade Federal de São Paulo, São Paulo, Brazil
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OBJECTIVE

To evaluate the discriminative properties and validity of the Airways Questionnaire 20 (AQ20) in a sample of airway obstructed patients and to compare its properties with those of the St George's Respiratory Questionnaire (SGRQ) and the Short Form 36 (SF-36).

PATIENTS AND METHODS

A convenience sample of 47 subjects was recruited from among 61 consecutive patients referred to an outpatient clinic specialized in airway obstructive diseases. All subjects completed the AQ20, SGRQ, and SF-36. Other measures were the baseline dyspnea index (BDI),6-minute walk test (6MWT) distance, spirometry, results of arterial blood gas analysis, and body mass index.

RESULTS

The AQ20 showed very good correlation with the SGRQ total score (ρ = 0.84, P < .001) and moderate correlation with all SF-36 domains (physical capacity, ρ = −0.53;physical functioning,ρ = −0.61;bodily pain, ρ = −0.55;general health,ρ = −0.59;vitality,ρ = − 0.55;;social functioning,ρ = −0.57; emotional role functioning,ρ = −0.51; mental health,ρ = −0.61;all P < .001).The BDI and the 6MWT were the best predictors of AQ20 score (r2 = 0.31) in the regression model. An area under the receiver operating characteristic curve of 0.91 (P < .001) indicated a high level of accuracy for the AQ20, using the SGRQ as the gold standard.

CONCLUSION

This study shows that the AQ20 is an accurate health status questionnaire in patients with moderate-to-severe airway obstruction. It could be an alternative to longer, traditional questionnaires such as the SGRQ.

Key words:
Questionnaires
Quality of life
Health Status
Statistics
Dyspnea
Chronic obstructive pulmonary disease
OBJETIVO

Evaluar las propiedades discriminativas y la validez del cuestionario Airways Questionnaire 20 (AQ20) en un grupo de pacientes con cuadros de obstrucción de la vía respiratoria, y comparar sus propiedades con las de los cuestionarios St. George's Respiratory Questionnaire (SGRQ) y Short Form 36 (SF-36).

PACIENTES Y MÉTODOS

De un grupo de 61 pacientes consecutivos, remitidos a una consulta ambulatoria especializada en enfermedades obstructivas de la vía respiratoria, se seleccionó una muestra de conveniencia constituida por 47 pacientes. Todos los pacientes completaron los cuestionarios AQ20, SGRQ y SF-36.Otros parámetros evaluados fueron el índice de disnea basal, la distancia recorrida en la prueba de la marcha de 6 min, los resultados de la gasometría en sangre arterial y el índice de masa corporal.

RESULTADOS

El cuestionario AQ20 presentó una correlación estrecha con la puntuación del SGRQ total (ρ=0,84; p < 0,001) y una correlación moderada con todos los dominios del SF-36 (capacidad física,ρ=−0,53;actividad física, ρ=−0,61;dolor corporal,ρ=−0,55;salud general,ρ=−0,59; vitalidad,ρ=−0,55;actividad social,ρ=−0,57;actividad de rol emocional,ρ=−0,51;salud mental,ρ=−0,61;en todos los casos, p < 0,001).El índice de disnea basal y la distancia recorrida en la prueba de la marcha de 6 min fueron los mejores elementos predictivos de la puntuación del AQ20 (r2 = 0,31) en el modelo de regresión. El área bajo la curva de eficacia diagnóstica, que fue de 0,91 (p < 0,001), indicó un elevado grado de precisión del cuestionario AQ20, utilizando como prueba de referencia el SGRQ.

CONCLUSIONES

Los resultados obtenidos en este estudio demuestran que el AQ20 es un cuestionario preciso de salud en los pacientes con obstrucción de la vía respiratoria de grado moderado a intenso. Podría constituir una alternativa a los cuestionarios tradicionales más complejos, como el SGRQ.

Palabras clave:
Cuestionarios
Calidad de vida
Nivel de salud
Estadística
Disnea
EPOC
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This study was partially supported by CAPES, CNPq, and FAPESP-Brazil.

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