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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetive</span><p class="elsevierStyleSimplePara elsevierViewall">To identify patients with a low short-term risk of complications following acute pulmonary thromboembolism&#46;</p> <span class="elsevierStyleSectionTitle">Patients and methods</span><p class="elsevierStyleSimplePara elsevierViewall">A prospective multicenter study was conducted in 8 Spanish hospitals&#59; 681 consecutive outpatients diagnosed with pulmonary thromboembolism were enrolled&#46; Clinically significant variables were weighted using coefficients derived from a logistic regression model in order to optimize the diagnostic performance of a clinical prediction rule to predict the following complications within 10 days of acute pulmonary thromboembolism&#58; death&#44; recurrent thromboembolism&#44; and major or minor bleeding&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Forty-three patients &#40;6&#46;3&#37;&#41; had 51 complications&#46; These included 33 deaths&#44; 12 major bleeding episodes&#44; and 6 minor bleeding episodes&#46; The clinical variables used in the prediction rule were assigned the following scores&#58; recent major bleeding episode and cancer with metastasis&#44; 4 points each&#59; creatinine levels of over 2 mg&#47;dL&#44; 3 points&#59; cancer without metastasis and immobility due to a recent medical condition&#44; 2 points each&#59; and absence of surgery in the past 2 months and an age of over 60 years&#44; 1 point each&#46; A risk score of 2 or less&#44; obtained by 47&#46;8&#37; of patients&#44; indicated a low short-term risk of developing complications following pulmonary thromboembolism&#46; The area under the receiver operating characteristic curve for the prediction rule was 0&#46;75 &#40;95&#37; confidence interval &#91;CI&#93;&#44; 0&#46;67&#8211;0&#46;83&#41;&#46; For this cutoff point&#44; sensitivity was 82&#46;9&#37; &#40;95&#37; CI&#44; 68&#46;7&#8211;91&#46;5&#41; and the likelihood ratios for a positive and negative test result were 1&#46;63 &#40;95&#37; CI&#44; 1&#46;39&#8211;1&#46;92&#41;&#44; and 0&#46;35 &#40;95&#37; CI&#44; 0&#46;18&#8211;0&#46;69&#41;&#44; respectively&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">Our clinical prediction rule could be useful for identifying patients with a low risk of complications in the 10 days following acute pulmonary thromboembolism&#46; Those patients would be eligible for consideration for outpatient treatment&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Identificar a pacientes con riesgo bajo de complicaciones a corto plazo tras un episodio agudo de tromboembolia pulmonar &#40;TEP&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se trata de un estudio multic&#233;ntrico y prospectivo&#44; realizado en 8 hospitales espa&#241;oles&#44; en el que se incluy&#243; a un total de 681 pacientes ambulatorios consecutivos con diagn&#243;stico de TEP&#46; Las variables con significaci&#243;n cl&#237;nica se ponderaron a partir de los coeficientes del modelo log&#237;stico&#44; con el objetivo de maximizar las caracter&#237;sticas diagn&#243;sticas de la escala cl&#237;nica de predicci&#243;n de eventos a corto plazo&#58; muertes&#44; recidivas tromboemb&#243;licas o complicaciones hemorr&#225;gicas graves y no graves en los 10 primeros d&#237;as&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Hubo 51 complicaciones en 43 pacientes &#40;6&#44;3&#37;&#41;&#58; un total de 33 fallecimientos&#44; 12 hemorragias graves y 6 no graves&#46; La puntuaci&#243;n cl&#237;nica asignada a las variables de la escala de predicci&#243;n fue la siguiente&#58; hemorragia grave reciente y c&#225;ncer con met&#225;stasis&#44; 4 puntos cada una&#59; valores de creatinina mayores de 2 mg&#47;dl&#44; 3 puntos&#59; c&#225;ncer sin met&#225;stasis e inmovilizaci&#243;n por enfermedad m&#233;dica reciente&#44; 2 puntos cada una&#44; y ausencia de cirug&#237;a en los &#250;ltimos 2 meses y edad superior a 60 a&#241;os&#44; 1 punto cada una&#46; Una puntuaci&#243;n de 2 o menor&#44; que obtuvo el 47&#44;8&#37; de nuestros pacientes&#44; indica un riesgo bajo de presentar complicaciones a corto plazo tras la TEP&#46; El &#225;rea bajo la curva de eficacia diagn&#243;stica de la escala es de 0&#44;75 &#40;intervalo de confianza &#91;IC&#93; del 95&#37;&#44; 0&#44;67&#8211;0&#44;83&#41;&#46; Para ese punto de corte la sensibilidad es del 82&#44;9&#37; &#40;IC del 95&#37;&#44; 68&#44;7&#8211;91&#44;5&#41;&#44; el cociente de probabilidad positiva del 1&#44;63 &#40;IC del 95&#37;&#44; 1&#44;39&#8211;1&#44;92&#41; y el cociente de probabilidad negativa de 0&#44;35 &#40;IC del 95&#37;&#44; 0&#44;18&#8211;0&#44;69&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">Nuestra escala cl&#237;nica de puntuaci&#243;n podr&#237;a ser &#250;til para identificar a pacientes con riesgo bajo de presentar complicaciones durante los 10 primeros d&#237;as tras un episodio de TEP aguda&#46; Estos pacientes ser&#237;an los candidatos sobre los que plantear un estudio que avale el tratamiento domiciliario de la TEP&#46;</p>"
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Vol. 43. Issue 11.
Pages 617-622 (January 2007)
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Vol. 43. Issue 11.
Pages 617-622 (January 2007)
Original Articles
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A Clinical Prediction Rule for Identifying Short-Term Risk of Adverse Events in Patients With Pulmonary Thromboembolism
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Fernando Uresandia,
Corresponding author
fern2148@separ.es

Correspondence: Dr. F. Uresandi. Servicio de Neumología. Hospital de Cruces. Barrio Labeaga, s/n. 48903 Barakaldo. Bizkaia. España
, Remedios Oterob, Aurelio Cayuelac, Miguel Ángel Cabezudod, David Jiméneze, Elena Lasernaf, Francisco Congetg, Miquel Oribeh, Dolores Nauffali
a Servicio de Neumología, Hospital de Cruces, Barakaldo, Bizkaia, Spain
b Servicio de Neumología, Hospital Virgen del Rocío, Sevilla, Spain
c Unidad de Apoyo a la Investigación, Hospital Virgen del Rocío, Sevilla, Spain
d Servicio de Neumología, Hospital Central de Asturias, Oviedo, Asturias, Spain
e Servicio de Neumología, Hospital Ramón y Cajal, Madrid, Spain
f Sección de Neumología, Servicio de Medicina Interna, Hospital San Juan de Dios, Bormujos, Sevilla, Spain
g Servicio de Neumología, Hospital Clínico Lozano Blesa, Zaragoza, Spain
h Servicio de Neumología, Hospital de Galdakao, Galdakao, Bizkaia, Spain
i Servicio de Neumología, Hospital La Fe, Valencia, Spain
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Objetive

To identify patients with a low short-term risk of complications following acute pulmonary thromboembolism.

Patients and methods

A prospective multicenter study was conducted in 8 Spanish hospitals; 681 consecutive outpatients diagnosed with pulmonary thromboembolism were enrolled. Clinically significant variables were weighted using coefficients derived from a logistic regression model in order to optimize the diagnostic performance of a clinical prediction rule to predict the following complications within 10 days of acute pulmonary thromboembolism: death, recurrent thromboembolism, and major or minor bleeding.

Results

Forty-three patients (6.3%) had 51 complications. These included 33 deaths, 12 major bleeding episodes, and 6 minor bleeding episodes. The clinical variables used in the prediction rule were assigned the following scores: recent major bleeding episode and cancer with metastasis, 4 points each; creatinine levels of over 2 mg/dL, 3 points; cancer without metastasis and immobility due to a recent medical condition, 2 points each; and absence of surgery in the past 2 months and an age of over 60 years, 1 point each. A risk score of 2 or less, obtained by 47.8% of patients, indicated a low short-term risk of developing complications following pulmonary thromboembolism. The area under the receiver operating characteristic curve for the prediction rule was 0.75 (95% confidence interval [CI], 0.67–0.83). For this cutoff point, sensitivity was 82.9% (95% CI, 68.7–91.5) and the likelihood ratios for a positive and negative test result were 1.63 (95% CI, 1.39–1.92), and 0.35 (95% CI, 0.18–0.69), respectively.

Conclusions

Our clinical prediction rule could be useful for identifying patients with a low risk of complications in the 10 days following acute pulmonary thromboembolism. Those patients would be eligible for consideration for outpatient treatment.

Key words:
Pulmonary thromboembolism
Clinical prediction rule
Short-term complications
Objetivo

Identificar a pacientes con riesgo bajo de complicaciones a corto plazo tras un episodio agudo de tromboembolia pulmonar (TEP).

Pacientes y métodos

Se trata de un estudio multicéntrico y prospectivo, realizado en 8 hospitales españoles, en el que se incluyó a un total de 681 pacientes ambulatorios consecutivos con diagnóstico de TEP. Las variables con significación clínica se ponderaron a partir de los coeficientes del modelo logístico, con el objetivo de maximizar las características diagnósticas de la escala clínica de predicción de eventos a corto plazo: muertes, recidivas tromboembólicas o complicaciones hemorrágicas graves y no graves en los 10 primeros días.

Resultados

Hubo 51 complicaciones en 43 pacientes (6,3%): un total de 33 fallecimientos, 12 hemorragias graves y 6 no graves. La puntuación clínica asignada a las variables de la escala de predicción fue la siguiente: hemorragia grave reciente y cáncer con metástasis, 4 puntos cada una; valores de creatinina mayores de 2 mg/dl, 3 puntos; cáncer sin metástasis e inmovilización por enfermedad médica reciente, 2 puntos cada una, y ausencia de cirugía en los últimos 2 meses y edad superior a 60 años, 1 punto cada una. Una puntuación de 2 o menor, que obtuvo el 47,8% de nuestros pacientes, indica un riesgo bajo de presentar complicaciones a corto plazo tras la TEP. El área bajo la curva de eficacia diagnóstica de la escala es de 0,75 (intervalo de confianza [IC] del 95%, 0,67–0,83). Para ese punto de corte la sensibilidad es del 82,9% (IC del 95%, 68,7–91,5), el cociente de probabilidad positiva del 1,63 (IC del 95%, 1,39–1,92) y el cociente de probabilidad negativa de 0,35 (IC del 95%, 0,18–0,69).

Conclusiones

Nuestra escala clínica de puntuación podría ser útil para identificar a pacientes con riesgo bajo de presentar complicaciones durante los 10 primeros días tras un episodio de TEP aguda. Estos pacientes serían los candidatos sobre los que plantear un estudio que avale el tratamiento domiciliario de la TEP.

Palabras clave:
Tromboembolia pulmonar
Escala clínica de predicción
Complicaciones a corto plazo
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This study was funded by grants from the Instituto de Salud Carlos III of the Spanish Ministry of Health and Consumer Affairs (2003-2006) and from the Spanish Society of Pulmonology and Thoracic Surgery (SEPAR) (2005).

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