Data quality control
An experienced language expert translated the questionnaire from English into the local language and back-translated it into English to ensure consistency. A pre-test was performed to ensure the understandability and clarity of the questionnaire. Data collectors and supervisors received two-day training on the study’s objectives and how to perform the interview. The completeness, inconsistency, and data quality of the completed questionnaire were checked daily. Cronbach’s alpha of 0.7 or greater was used to assess the instrument’s reliability.