Validación al idioma español de Venezuela de los índices de actividad de enfermedad y el índice funcional para espondilitis anquilosante / Validity of a Venezuelan version of the bath ankylosing spondylitis functional index and bath ankylosing spondylitis disease activity index

Introducción: Las espondiloartritis (EsA) son enfermedades discapacitantes, con una prevalencia del 1,9% en la población general; los índices diseñados para su seguimiento deben ser válidos, confiables y adaptados transculturalmente para decidir el tratamiento y la vigilancia adecuada. El cambiar un adjetivo o un pronombre en un cuestionario autoadministrado puede ser la gran diferencia cuando se quiere investigar el estado actual de la enfermedad. Objetivos: Desarrollar una versión venezolana de la versión original en inglés de BASDAI/BASFI, para evaluar su confiabilidad y validez en pacientes venezolanos con EsA. Métodos: Se necesitaron lingüistas certificados para la traducción de una versión venezolana de BASDAI/BASFI. La evaluación de la confiabilidad y la validez se realizó mediante el cálculo de coeficientes de correlación, además de la correlación α de Cronbach, entre la puntuación de BASDAI y los parámetros clínicos (p. ej., ESR, CRP, índice de prueba de Schöber modificado, distancia occipucio-pared y recuento de entesis). Resultados: Cuarenta pacientes, 31 hombres (77,5%) y 9 mujeres (22,5%), con una edad promedio ± desviación estándar 35,9 ± 12,0 años. Duración de la enfermedad fue de 11,5 ± 9,5 años. El 45% presentaba EsA indiferenciada, el 27,5% espondilitis anquilosante y el 20,0% artritis psoriásica. La artritis reactiva, la espondilitis anquilosante juvenil y la artritis enteropática representaron el 2,5% cada una. La confiabilidad test-retest del BASDAI y del BASFI fueron ambas de 0,99 (p < 0,0001). La consistencia interna para el BASDAI fue de 0,88 (p = 0,002), coeficiente de correlación intraclase para consistencia interna: 0,9867 (p = 0,001). Consistencia interna para el BASFI: α de Cronbach: 0,7985 (p = 0,002), coeficiente de correlación intraclase para consistencia interna: 0,9055 (p = 0,001). La validez de constructo del BASDAI fue de 0,84 para estado de bienestar general del paciente y 0,84 para el recuento de entesis (p < 0,0001). Conclusión: La versión venezolana del BASDAI/BASFI podría utilizarse en la investigación clínica para evaluar el curso de la actividad de la enfermedad en pacientes venezolanos con EsA

Introduction: Spondyloarthropathies (SpA) are disabling diseases with a prevalence of 1.9% in the general population. The indices designed for monitoring the disease should be valid, reliable and cross-culturally adapted for decision-making concerning the appropriate treatment. Changing an adjective or pronoun in a self-administered questionnaire could be the big difference in condensing an idea in a few words and transmitting that concept to all those who share the same language. Objectives: To develop a Venezuelan version of the original English version of the BASDAI/BASFI and to evaluate its reliability and validity in Venezuelan patients with SpA. Methods: Certified linguists were needed for the translation of a Venezuelan version of the BASDAI/BASFI. The evaluation of reliability and validity was performed by calculating correlation coefficients in addition to Cronbach's alpha correlation between the BASDAI score and the clinical parameters (for example: erythrocyte sedimentation rate, C-reactive protein, modified Schöber test, occiput-to-wall distance and enthesis count). Results: We studied 40 patients including 31 men (77.5%) and 9 women (22.5%). The mean age was 35.9 years ± standard deviation (SD) 12.01 and the disease duration was 11.5 years (± SD 9.5). The most common diagnoses were undifferentiated spondyloarthritis (45%), ankylosing spondylitis (27.5%) and psoriatic arthritis (20%). The incidences of reactive arthritis, ankylosing spondylitis and juvenile Reiter's syndrome were 2.5% each. The test-retest reliability of the BASDAI and BASFI was high (R = 0.99 and 0.99, respectively; P<.0001). The internal consistency for the BASDAI was high (Cronbach's alpha = 0.88; P=.002) and the intraclass correlation coefficient for internal consistency: 0.9867 (P=.001). Internal consistency for the BASFI: Cronbach's alpha = 0.7985 (P=.002), intraclass correlation coefficient for internal consistency: 0.9055 (P=.001). Construct validity of the BASDAI was high for general well-being of the patient (R = 0.84) and for enthesis count (R = 0.84). Low back pain showed moderate correlation with BASDAI (R = 0.69; P<.0001) and the erythrocyte sedimentation rate showed a low correlation (R = 0.39683; P=.0112). Conclusion: The Venezuelan version of the BASDAI/BASFI could be used in clinical research to assess and evaluate the course of disease activity in Venezuelan SpA patients

Validity of a Venezuelan version of the Bath Ankylosing Spondylitis Functional Index and Bath Ankylosing Spondylitis Disease Activity Index. / Validación al idioma español de Venezuela de los índices de actividad de enfermedad y el índice funcional para espondilitis anquilosante.

INTRODUCTION: Spondyloarthropathies (SpA) are disabling diseases with a prevalence of 1.9% in the general population. The indices designed for monitoring the disease should be valid, reliable and cross-culturally adapted for decision-making concerning the appropriate treatment. Changing an adjective or pronoun in a self-administered questionnaire could be the big difference in condensing an idea in a few words and transmitting that concept to all those who share the same language. OBJECTIVES: To develop a Venezuelan version of the original English version of the BASDAI/BASFI and to evaluate its reliability and validity in Venezuelan patients with SpA. METHODS: Certified linguists were needed for the translation of a Venezuelan version of the BASDAI/BASFI. The evaluation of reliability and validity was performed by calculating correlation coefficients in addition to Cronbach's alpha correlation between the BASDAI score and the clinical parameters (for example: erythrocyte sedimentation rate, C-reactive protein, modified Schöber test, occiput-to-wall distance and enthesis count). RESULTS: We studied 40 patients including 31 men (77.5%) and 9 women (22.5%). The mean age was 35.9 years ± standard deviation (SD) 12.01 and the disease duration was 11.5 years (± SD 9.5). The most common diagnoses were undifferentiated spondyloarthritis (45%), ankylosing spondylitis (27.5%) and psoriatic arthritis (20%). The incidences of reactive arthritis, ankylosing spondylitis and juvenile Reiter's syndrome were 2.5% each. The test-retest reliability of the BASDAI and BASFI was high (R = 0.99 and 0.99, respectively; P<.0001). The internal consistency for the BASDAI was high (Cronbach's alpha = 0.88; P=.002) and the intraclass correlation coefficient for internal consistency: 0.9867 (P=.001). Internal consistency for the BASFI: Cronbach's alpha = 0.7985 (P=.002), intraclass correlation coefficient for internal consistency: 0.9055 (P=.001). Construct validity of the BASDAI was high for general well-being of the patient (R = 0.84) and for enthesis count (R = 0.84). Low back pain showed moderate correlation with BASDAI (R = 0.69; P<.0001) and the erythrocyte sedimentation rate showed a low correlation (R = 0.39683; P=.0112). CONCLUSION: The Venezuelan version of the BASDAI/BASFI could be used in clinical research to assess and evaluate the course of disease activity in Venezuelan SpA patients.