Asociación entre composición corporal y actividad inflamatoria en artritis reumatoide. Una revisión sistemática / Association between body composition and disease activity in rheumatoid arthritis. A systematic review

Introducción. Los estudios respecto a la asociación entre composición corporal y actividad inflamatoria en artritis reumatoide (AR) muestran resultados contradictorios. Objetivo. Realizar una revisión sistemática de la literatura sobre la asociación entre sobrepeso/obesidad y nivel de actividad inflamatoria en AR. Metodología. Enfoque FAST: búsqueda (Medline, EBSCO, biblioteca Cochrane); revisión de resúmenes, selección para lectura en texto completo y evaluación de la calidad metodológica para inclusión. Debido a la heterogeneidad en el análisis y evaluación de la actividad de la AR, realizamos metaanálisis; los resultados se presentan como síntesis cualitativa. Resultados. Se identificaron 119 artículos; 16 fueron revisados en texto completo. Se incluyeron 11 artículos (8.147 pacientes; rango n: 37-5.161) que aprobaron la evaluación de calidad metodológica. La concordancia interevaluador para la calidad metodológica (CCI: 0,93; IC 95%:0,82-0,98; p<0,001) y la decisión aceptación/rechazo (k 1,00, p>0,001) fueron excelentes. En todos los estudios la composición corporal se evaluó mediante IMC, pero hubo marcada heterogeneidad en la evaluación de la actividad inflamatoria. Se encontró asociación significativa entre actividad clínica y mayores valores de IMC en 6 estudios de mayor tamaño muestral promedio (1.274; rango: 140-5.161), mientras que en 5 con menor tamaño muestral promedio (100; rango: 37-150) no se encontró asociación entre actividad e IMC. Conclusiones. La asociación entre actividad de la AR e IMC en los estudios con tendencia a mayor potencia estadística indica que la masa grasa podría modular el estado clínico en AR. El estudio de la relación entre composición corporal y actividad inflamatoria en AR requiere de más estudios y de mayor calidad metodológica (AU)

Background. Reports regarding the association between body composition and inflammatory activity in rheumatoid arthritis (RA) have consistently yielded contradictory results. Objective. To perform a systematic review on the association between overweight/obesity and inflammatory activity in RA. Methods. FAST approach: Article search (Medline, EBSCO, Cochrane Library), followed by abstract retrieval, full text review and blinded assessment of methodological quality for final inclusion. Because of marked heterogeneity in statistical approach and RA activity assessment method, a meta-analysis could not be done. Results are presented as qualitative synthesis. Results. One hundred and nineteen reports were found, 16 of them qualified for full text review. Eleven studies (8,147 patients; n range: 37-5,161) approved the methodological quality filter and were finally included. Interobserver agreement for methodological quality score (ICC: 0.93; 95% CI: 0.82-0.98; P<.001) and inclusion/rejection decision (k 1.00, P>.001) was excellent. In all reports body composition was assessed by BMI; however a marked heterogeneity was found in the method used for RA activity assessment. A significant association between BMI and RA activity was found in 6 reports having larger mean sample size: 1,274 (range: 140-5,161). On the other hand, this association was not found in 5 studies having lower mean sample size: 100 (range: 7-150). Conclusions. The modulation of RA clinical status by body fat mass is suggested because a significant association was found between BMI and inflammatory activity in those reports with a trend toward higher statistical power. The relationship between body composition and clinical activity in RA requires be approached with further studies with higher methodological quality (AU)

Association between body composition and disease activity in rheumatoid arthritis. A systematic review. / Asociación entre composición corporal y actividad inflamatoria en artritis reumatoide. Una revisión sistemática.

BACKGROUND: Reports regarding the association between body composition and inflammatory activity in rheumatoid arthritis (RA) have consistently yielded contradictory results. OBJECTIVE: To perform a systematic review on the association between overweight/obesity and inflammatory activity in RA. METHODS: FAST approach: Article search (Medline, EBSCO, Cochrane Library), followed by abstract retrieval, full text review and blinded assessment of methodological quality for final inclusion. Because of marked heterogeneity in statistical approach and RA activity assessment method, a meta-analysis could not be done. Results are presented as qualitative synthesis. RESULTS: One hundred and nineteen reports were found, 16 of them qualified for full text review. Eleven studies (8,147 patients; n range: 37-5,161) approved the methodological quality filter and were finally included. Interobserver agreement for methodological quality score (ICC: 0.93; 95% CI: 0.82-0.98; P<.001) and inclusion/rejection decision (k 1.00, P>.001) was excellent. In all reports body composition was assessed by BMI; however a marked heterogeneity was found in the method used for RA activity assessment. A significant association between BMI and RA activity was found in 6 reports having larger mean sample size: 1,274 (range: 140-5,161). On the other hand, this association was not found in 5 studies having lower mean sample size: 100 (range: 7-150). CONCLUSIONS: The modulation of RA clinical status by body fat mass is suggested because a significant association was found between BMI and inflammatory activity in those reports with a trend toward higher statistical power. The relationship between body composition and clinical activity in RA requires be approached with further studies with higher methodological quality.