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Background Sarcopenia represents a constant threat to the health of older adults, and accurate risk perception is essential for disease prevention and control. However, current methodologies lack rigorously validated instruments to assess the perceived risk of sarcopenia among this group. Thus, this study aimed to develop and validate a sarcopenia disease risk perception scale for older adults. Design The study was conducted in two phases: development of the initial scale and its psychometric evaluation. A STROBE checklist was employed. Methods Based on the two-factor model of risk perception theory and the health belief model, the initial draft of the scale was created through literature review, expert consultations, and a preliminary survey with a small sample. Then, we used a cross-sectional study methodology to conveniently select 438 Chinese older adults. Item analysis, exploratory factor analysis (EFA), and confirmatory factor analysis (CFA) were used to refine and validate the scale items. Internal consistency and external consistency were assessed to confirm the scale’s reliability. Results These evaluations established the scale’s framework: content validity, item analysis, and EFA. The two factors extracted from the initial analysis explained 62.250% of the observation variance. The CFA confirmed a good fit for the model, demonstrating the scale’s robust reliability and validity. The finalized scale includes 15 items an d two dimensions: perceived susceptibility (eight items) and perceived severity (seven items). Conclusion The Sarcopenia Disease Risk Perception Scale for Older Adults is reliable and valid, making it appropriate for assessing the risk perception level in the target population. Supplementary Information The online version contains supplementary material available at 10.1186/s12877-024-05487-z.
Background Sarcopenia represents a constant threat to the health of older adults, and accurate risk perception is essential for disease prevention and control. However, current methodologies lack rigorously validated instruments to assess the perceived risk of sarcopenia among this group. Thus, this study aimed to develop and validate a sarcopenia disease risk perception scale for older adults. Design The study was conducted in two phases: development of the initial scale and its psychometric evaluation. A STROBE checklist was employed. Methods Based on the two-factor model of risk perception theory and the health belief model, the initial draft of the scale was created through literature review, expert consultations, and a preliminary survey with a small sample. Then, we used a cross-sectional study methodology to conveniently select 438 Chinese older adults. Item analysis, exploratory factor analysis (EFA), and confirmatory factor analysis (CFA) were used to refine and validate the scale items. Internal consistency and external consistency were assessed to confirm the scale’s reliability. Results These evaluations established the scale’s framework: content validity, item analysis, and EFA. The two factors extracted from the initial analysis explained 62.250% of the observation variance. The CFA confirmed a good fit for the model, demonstrating the scale’s robust reliability and validity. The finalized scale includes 15 items an d two dimensions: perceived susceptibility (eight items) and perceived severity (seven items). Conclusion The Sarcopenia Disease Risk Perception Scale for Older Adults is reliable and valid, making it appropriate for assessing the risk perception level in the target population. Supplementary Information The online version contains supplementary material available at 10.1186/s12877-024-05487-z.
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