Psychometric Properties of the Persian Version of Sickness Impact Profile-30 (SIP-30) in Community-Dwelling Older Adults.

Accurate measurement tools are essential for evaluating the health-related quality of life in older adults. We aimed to translate and evaluate the psychometric properties of the Sickness Impact Profile-30 (SIP-30) in community-dwelling older adults. One hundred and fifty older adults participated in this study. To evaluate construct validity, its correlation with General Health Questionnaire-28, Geriatric Depression Scale-15, Hospital Anxiety and Depression Scale, Modified Health Assessment Questionnaire, Numeric Pain Rating Scale, and Fullerton Advanced Balance Scale was assessed. Reliability features were also investigated. The results of construct validity analysis demonstrated a moderate to high ( = 0.61-0.84) correlation between the total score of SIP-30 and GHQ-28, GDS-15, HADS, MHAQ, and NPRS. There was a moderate inverse ( = -0.67) correlation between the total score of the SIP-30 and the FAB Scale. Test-retest reliability (ICC > 0.83) and internal consistency ( = 0.94) of the Persian SIP-30 were high. The results indicated that the Persian SIP-30 is a reliable and valid measure to assess health-related quality of life in community-dwelling older adults.