RESUMO
Osteoarthritis of the knee is the most common chronic joint disease that involves middle aged and elderly persons. There are different clinical instruments to quantify the health status of patients with knee Osteoarthritis and one example is the WOMAC score that has been translated and adapted into different languages. The purpose of this study was cultural adaptation, validation and reliability testing of the Persian version of the WOMAC index in Iranians with knee Osteoarthritis. We translated the original WOMAC questionnaire into Persian by the forward and backward technique, and then its psychometric study was done on 169 native Persian speaking patients with knee degenerative joint disease. Mean age of patients was 53.9 years. The SF-36 and KOOS were used to assess construct validity. Reliability testing resulted in a Cronbach's alpha of 0.917, showing the internal consistency of the questionnaire to be a reliable tool. Inter-correlation matrix among different scales of the Persian WOMAC index yielded a highly significant correlation between all subscales including stiffness, pain, and physical function. In terms of validity, Pearson's correlation coefficient was significant between three domains of the WOMAC with PF, RP, BP, GH, VT, and PCS dimensions of the SF-36 health survey [P<0.005] and KOOS [P<0.0001]. The Persian WOMAC index is a valid and reliable patient- reported clinical instrument for knee os-teoarthritis
RESUMO
OBJECTIVE: Asthma control has not been formally evaluated in the Caribbean. This study evaluated disease control on The Asthma Control Test (ACT), The Royal College of Physicians "Three questions" for Assessing Asthma Control (RCP), peak expiratory flow rate (PEFR) and patients'self-assessment of control. SUBJECTS AND METHODS: Asthma control was examined in a cross-section of 205 asthmatics above 16 years of age using the ACT, RCP and on the PEFR % predicted. Scores below 20 and equal to or above 1 on the ACT and RCP respectively, and PEFR below 80% predicted indicated uncontrolled asthma. Patients stated whether they perceived their asthma was controlled or uncontrolled. RESULTS: Overall there were more females (63.9%, p < 0.001) than males (36.1%). Males aged between 17-30 years predominated (60.8%, p < 0.001) with gender reversal beyond 30 years of age (33.2%, p < 0.002) years. Self-assessed control was higher (69.3%, p < 0.001) than control evaluated by the ACT and RCP tests, which were comparable (p > 0.05). Fewer patients (13.2%) achieved control on PEFR > 80% predicted than on the ACT (22.4%) and RCP (18%). The Kappa statistic indicated good reproducibility of the RCP and ACT and concordance between the PEFR and RCP (0.63) and the PEFR and ACT (0.56). Higher education was associated with control on the ACT (p < 0.0005) and RCP (p < 0.002) but not on PEFR or self-assessment (p > 0.05). CONCLUSION: Approximately 80% of study asthmatics were uncontrolled, and patients tended to overestimate their disease control. The ACT and RCP instruments were comparable with the PEFR. Efforts to study their validity and formal evaluation of asthma control in Trinidad are recommended.
OBJETIVO: El control del asma no ha sido evaluado formalmente en el Caribe. El estudio evaluó el control de la enfermedad utilizando el Test de Control del Asma (TCA), las "tres preguntas" del Colegio Real de Médicos para evaluar el control del asma (CRM), y la tasa de flujo expiratorio máximo (FEM) así como la autoevaluación del control por parte de los pacientes. SUJETOS Y MÉTODOS: El control del asma fue examinado en una sección transversal de 205 asmáticos de más de 16 años de edad, mediante el TCA, el CRM, y la predicción del FEM%. Las puntuaciones por debajo de 20 e iguales o por encima de 1 en el TCA y el CRM respectivamente, por debajo del 80% de predicción de la FEM, indicaban asma no controlada. Los pacientes informaban si percibían su asma como controlada o no controlada. RESULTADOS: En general hubo más (p < 0.001) mujeres (63.9%) que hombres (36.1%). Los hombres predominaron (p < 0.001) entre los 17 - 30 años (60.8%) con reversión del género (p < 0.002) pasados los 30 (33.2%) años. El control autoevaluado (69.3%) fue mayor (p < 0.001) que el control evaluado por las pruebas TCA y CRM, que fueron comparables (p > 0.05). Menos pacientes (13.2%) lograron un control con FEM > 80% de predicción que con TCA (22.4%) y CRM (18%). La estadística Kappa indicó una buena reproductibilidad de CRM y TCA, así como concordancia entre FEM y CRM (0.63) y FEM y TCA (0.56). Un nivel de educación más alto estuvo asociado con el control en TCA (p < 0.0005) y CRM (p < 0.002) pero no en FEM o autoevaluación (p > 0.05). CONCLUSIÓN: Aproximadamente el 80% de los asmáticos fueron no controlados, y los pacientes sobrestiman su control de la enfermedad. Los instrumentos TCA y CRM fueron comparables con la FEM. Se recomienda hacer esfuerzos por estudiar la validez de estos, así como la evaluación formal del control del asma en Trinidad.