Construct Validation and Reliability Assessment of Tamil Translated Hill-Bone--Compliance to High Blood Pressure Therapy Scale Among Hypertensive Patients in Rural Puducherry, South India.

Background: Pharmacological drugs and medications are being widely used for the control of non-communicable diseases like hypertension. Hill-Bone--Compliance to High Blood Pressure Therapy Scale (HB-HBP) is a newly developed specific questionnaire for assessing the anti-hypertensive medication adherence. Hence, this study was done to translate the HB-HBP in Tamil and to assess the construct validity and reliability of the Tamil version. Materials and Methods: Translation of HB-HBP to native language, Tamil was done by experts and piloted with subsample of hypertensive patients from rural Puducherry. Final Tamil-translated HB-HBP was administered among 328 Tamilspeaking hypertensive patients in the selected villages of rural Puducherry (union territory in South India). Construct validity was assessed by exploratory factor analysis (EFA) through the principal component method. Based on the minimum average partial and parallel analysis, three-factor model was distinguished. Confirmatory factor analysis was done to obtain the goodness-of-fit. Reliability of questionnaire was assessed through Cronbach's alpha coefficient. Results: Three factor structures were obtained with eigenvalues of 6.5045, 2.8165, and 1.2261, respectively, which accounted for 75.34% of variance. Three-factor model assessed by the confirmatory factor method found Chi-square value of 1055.048 (P value <0.001). Goodness of fit revealed acceptable comparative fit index (0.773), Tucker-Lewis index (0721), standardized root mean square residual (0.077), and root mean square error of approximation (0.201). The reliability coefficient (Cronbach's alpha) for the scale was 0.9020. Conclusion: Our study concludes that the HB-HBP questionnaire is internally valid and consistent with a good reliability coefficient for application in Tamil-speaking patients with hypertension. [ABSTRACT FROM AUTHOR]