Trilingual Versions of Hill-Bone Compliance to High Blood Pressure (9-Items) in Divergent Ethnic Groups of Older Adults in Iran

Objectives: the HBC-HBP Scale as a common scale for measuring adherence with hypertension, has never been tested in Iran. Methods: The demographic questionnaire and Persian, Turkmen, and Kazak versions of HBC-HBP were completed by 281 Iranian participants. The scale structure was evaluated using the goodness of fit by Exploratory and Confirmatory Factor Analysis (CFA). Results: The mean of CVI was 0.94, indicating good content validity.CFA revealed two subscales for HBC-HBP, collectively explaining 70% of the adherence medication variance in three versions. All item loadings were "moderate" to "excellent", ranging from 0.38 to 0.95. CFA indicated the goodness of fit for the HBC-HBP based on the trilingual version. Cronbach's alpha was 0.90 for the whole scale (p<0.001). The optimal cut-off point that best distinguished between adherent and non-adherent patients was 26.5. Discussion: Results showed the validity and reliability of the trilingual versions of instrument for measuring adherence medication in the elderly with hypertension. Keywords: Psychometrics, Iran, Blood Pressure, Aged, Adherence.