translation, validation, and cross-cultural adaptation of the patient and observer scar assessment scale (posas) into persian

Objectives: this study aimed to translate, culturally adapt, and validate the patient and observer scar assessment scale (posas) for persian-speaking populations, ensuring its applicability and reliability in both clinical and research settings in iran.methods: the cross-cultural adaptation process involved forward and backward translations, expert panel reviews, and pre-testing. a total of 60 post-surgical patients participated in the study. psychometric evaluations included content validity, internal consistency, and test-retest reliability. content validity ratios (cvrs) and content validity indices (cvis) were calculated, with thresholds set at 0.51 and 0.79, respectively. reliability was assessed using cronbach’s alpha coefficients (≥0.7) and test-retest stability over a two-week interval.results: the persian posas demonstrated robust psychometric properties. all items exceeded the cvi threshold, achieving strong expert consensus (cvr ≥0.51). cronbach’s alpha coefficients were 0.88 and 0.81 for the observer scar assessment scale (osas) and patient scar assessment scale (psas), respectively, indicating high internal consistency. test-retest reliability confirmed stability over time. these results were consistent with previous adaptations in other languages, including arabic and italian.conclusion: the persian adaptation of posas is a valid and reliable tool for scar assessment, filling a critical gap in patient-centered care for persian-speaking populations. this tool enables standardized evaluation of scars and supports clinical research. future studies should explore its responsiveness to therapeutic interventions and its applicability across diverse patient demographics.