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Validación mexicana de la escala MOS-HIV de calidad de vida en pacientes infectados por el VIH

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Date
2007
Author
Peña De León, Edilberto
Aguilar Gaytán, Sandra Socorro
Suárez Mendoza, Aldo Antonio
Reyes Terán, Gustavo
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Abstract
OBJETIVO: Validar la escala de calidad de vida MOS-HIV (Medical Outcomes Study HIV Health Survey) para su aplicación en investigación clínica, en México. MÉTODOS: Los datos para esta validación se recogieron entre abril de 2002 y febrero de 2004. Un comité de expertos realizó una síntesis de dos traducciones al castellano del cuestionario MOS-VIH, cuya factibilidad se valoró midiendo tiempos de respuesta y números de ítems no resueltos en un grupo de 32 personas. Se aplicó el cuestionario a un grupo de pacientes infectados por el virus de la inmunodeficiencia humana (VIH+) y un grupo de referencia. Se evaluaron la consistencia interna (coeficiente a de Cronbach), la validez discriminante (curvas de eficacia diagnóstica -curvas ROC- derivadas de las puntuaciones de los dos grupos) y la validez convergente (coeficiente de correlación de Spearman entre la puntuación del grupo de pacientes VIH+ y las puntuaciones en la escala visual analógica (EVA) del cuestionario EQ-5D y en una lista de síntomas, la carga viral y el recuento de linfocitos T CD4+). RESULTADOS: El tiempo medio de respuesta del cuestionario fue 10 min y 22 s, y el número medio de ítems sin resolver, 0,62. En las 11 dimensiones, el coeficiente a de Cronbach fue mayor de 0,75. Las puntuaciones medias obtenidas por los dos grupos fueron distintas en nueve dimensiones y los intervalos de confianza del 95 por ciento de las áreas bajo las curvas ROC no incluyeron el valor 0,5 en ocho dimensiones. El valor absoluto del coeficiente de correlación de Spearman fue menor de 0,3 respecto del número de linfocitos T CD4+ y de la carga viral, y mayor de 0,3 entre cada dimensión y respecto de las puntuaciones en la lista de síntomas y en la EVA del cuestionario EQ-5D. CONCLUSIONES: La escala MOS-HIV está validada para su uso en investigación, en la población mexicana infectada por el VIH.(AU)
 
OBJECTIVE: To validate the Medical Outcomes Study HIV Health Survey (MOS-HIV) quality of life instrument for its application in clinical research in Mexico. METHODS: The data for this study were collected between April, 2002, and February, 2004. An expert committee combined two Spanish-language translations of the MOS-HIV questionnaire. The new questionnaire's feasibility was assessed in a group of 32 HIV-infected persons by measuring how long they took to complete the questionnaire and the numbers of items they left unanswered. The questionnaire was then applied to a group of 120 HIV-positive patients and to a control group of 102 HIV-negative individuals. The following questionnaire characteristics were evaluated: (1) internal reliability (Cronbach alpha coefficient), (2) discriminant validity (the receiver operating characteristic (ROC) curves derived from the scores of the two groups), and (3) convergent validity (the Spearman correlation coefficients for the scores of the HIV-positive patients on the 11 MOS-HIV dimensions and their scores on the analog visual scale of the European Quality of Life 5-Dimensional format (EQ-5D) questionnaire, a list of symptoms, the viral load, and the CD4 cell count). RESULTS: The mean response time with the questionnaire was 10 minutes and 22 seconds, and the mean number of unanswered items was 0.62. With each of the 11 dimensions of the questionnaire, the Cronbach alpha coefficient was at least 0.75. The mean scores obtained by the two groups were different for 9 of the 11 dimensions, and the 95 percent confidence intervals of the areas under the ROC curves did not include the value of 0.5 for 8 of the dimensions. The absolute value of the Spearman correlation coefficient was less than 0.3 for the CD4 cell count and for the viral load, and it was greater than 0.3 for each dimension and the scores on the list of symptoms and on the analog visual scale of the EQ-5D questionnaire. CONCLUSIONS: The MOS-HIV...(AU)
 
Translated title
A validation of the MOS-HIV quality of life measure in HIV-infected patients in Mexico
Series
Rev Panam Salud Publica;21(5),mayo 2007
Subject
Infecções por HIV; Qualidade de Vida; Questionários; Mexico
URI
http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892007000400007
https://iris.paho.org/handle/10665.2/7864
Citation
Peña De León, Edilberto,Aguilar Gaytán, Sandra Socorro,Suárez Mendoza, Aldo Antonio,Reyes Terán, Gustavo (2007) Validación mexicana de la escala MOS-HIV de calidad de vida en pacientes infectados por el VIH. Rev Panam Salud Publica;21(5) 313-319,mayo 2007. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892007000400007
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