Validation and psychometric analysis of the Persian version of the Hair-Specific Skindex-29 among patients with hair loss
نویسندگان
1 Department of General Medicine, Iran University of Medical Sciences, Tehran, Iran
2 Department of Dermatology, Rasool Akram Medical Complex, Iran University of Medical Sciences, Tehran, Iran
3 Gastrointestinal and Liver Diseases Research Centre, Iran University of Medical Sciences, Tehran, Iran
4 Health Management and Economics Research Center, Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
5 Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran
6 Department of Dermatology, Rasool Akram Medical Complex, Iran University of Medical Sciences, Tehran, Iran
doi
10.22034/ijd.2024.461322.1853چکیده
Background: Hair loss significantly impacts both the physical and social dimensions of health-related quality of life (HRQOL). In the absence of available Persian tools to assess HRQOL in these patients, this study aims to fill this gap by evaluating the psychometric properties of the Persian version of the Hair-Specific Skindex-29 (HSS-29) among Persian- speaking adults experiencing hair loss.Methods: This psychometric study was conducted from September 2021 to June 2022 in Tehran, Iran, involving participants from dermatology clinics who were diagnosed with various types of hair loss. The HSS-29 was translated into Persian, back-translated to ensure accuracy, and reviewed for consistency. Face and content validity were rigorously assessed through expert reviews and patient feedback. Construct validity was evaluated with 192 participants using confirmatory factor analysis (CFA). Convergent validity was established by correlating the Persian version of the Dermatology Life Quality Index (PVDLQI) among 109 patients. Reliability and internal consistency were assessed using test-retest methodology and Cronbach’s alpha. Statistical analyses were performed using SPSS and R software.Results: An expert panel’s assessment of content validity led to the removal of nine items from the initial instrument. Consequently, the final version, named the Modified Persian version of HSS-29 (MPVHSS-29), comprised 20 items. The Spearman’s correlation coefficient between the MPVHSS-29 and the PVDLQI was significant, indicating a strong relationship (r = 0.71). CFA demonstrated acceptable goodness-of-fit indices for the model. The Cronbach’s alpha values for the instrument’s subscales were in the good range (≥ 0.70), indicating solid internal consistency. Additionally, the intraclass correlation coefficient (ICC) results showed that the MPVHSS-29 possesses suitable external reliability (r = 0.84, P = 0.001).Conclusion: The study confirms that the MPVHSS-29 is an effective psychometric tool for assessing HRQOL in Persian-speaking patients experiencing hair loss. This instrument can be utilized to evaluate the effectiveness of various treatments for hair loss, offering a comprehensive tool for both clinical assessment and the evaluation of treatment efficacy.
