Translation and psychometric evaluation of an instrument to assess the health beliefs of Pakistani mothers regarding human papillomavirus vaccination

Objective: Investigating mothers' health beliefs regarding human papillomavirus (HPV) vaccination is essential for understanding their decisions regarding vaccinating their daughters against HPV. There is no available validated instrument to measure the health beliefs of Pakistani mothers regarding HPV vaccination for their daughters. The purpose of this study was to translate the Human Papillomavirus Vaccination Scale - Health Belief Model (HPVS-HBM) into Urdu and to evaluate the psychometric properties of the translated Urdu version among Pakistani mothers in Hong Kong.

Methods: This was a descriptive correlational study for which a convenience sample of 260 Pakistani women was recruited. The original HPVS-HBM questionnaire was translated from English to Urdu according to Brislin's model. A panel of experts reviewed the translated questionnaire and assessed the content validity of the items and the scale. Face validity was assessed in a sample of five Pakistani mothers, while structural validity was examined by an exploratory factor analysis. Internal consistency and test-retest reliability were assessed to evaluate the reliability of the translated instrument.

Results: The translated questionnaire demonstrated good face validity and content validity (item-level content validity index: 0.83-1.00; scale-level content validity index: 0.89-1.00). Factor analysis of the 22 items in the scale revealed a three-factor structure (perceived susceptibility, perceived severity and perceived benefits), which accounted for 77.66% of the total variance. The translated questionnaire also showed good internal consistency (Cronbach's alpha: 0.93-0.98) and acceptable test-retest reliability (weighted kappa: 0.49-0.96; intra-class correlation coefficient: 0.83-0.93).

Conclusions: The translated Urdu version of the HPVS-HBM demonstrated desirable psychometric properties, indicating that it could be used as a valid and reliable instrument for measuring Pakistani mothers' health beliefs regarding HPV vaccination for their daughters in Hong Kong.