Validity and reliability of Self Rated Health (SRH) measure among Iranian community-dwelling older adults

R.S. Hosseini 1, Y.A. Momtaz 1,4, F. Mohammadi-Shahboulaghi 2, R. Sahaf 1, M.R. Soroush 3

1 Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran; 2 Social Determinants of Health Research Center, University of Social Welfare and Rehabilitation Sciences (USWR), Tehran, Iran; 3 Janbazan Medical and Engineering Research Center (JMERC), Farrokh Ave, Velenjak, Tehran, Iran; 4 Malaysian Research Institute on Ageing (MyAgeing), Universiti Putra Malaysia, Serdang, Selangor, Malaysia

Background. Self-rated health (SRH) is a simple and easy-to-use measure of general health. The aim of this study was to explore the validity and reliability of the SRH measure among Iranian community-dwelling older adults.

Methods. This cross-sectional study was conducted on a sample of 600 community-dwelling older adults aged 60 years and over in Tehran, Iran, 2017. A multistage clustered random sampling technique was employed to obtain the sample. The SRH was assessed using a single item questionnaire entitled “In general, how would you rate your health”. The criterion validity was assessed with the Charlson Comorbidity Index (CCI) and World Health Organization-five (WHO-5) well-being index. The Pearson correlation and Intra-class Correlation Coefficient (ICC) using SPSS version 23 software were applied to test validity and reliability, respectively.

Results. Out of 600 respondents, 64.0% were female. The sample mean age was 76.82 (SD = 7.45) years, and nearly 63% of them were married. The CCI and WHO-5 well-being index were employed to check criterion validity. The results of criterion validity showed that the CCI and WHO-5 well-being had negative and positive correlation with the SRH, respectively (r = -0.35, p < 0.001 and r = 0.5, p < 0.001). Additionally, the reliability of the SRH, using ICC, was found to be 0.83; 95% CI (0.72 to 0.90). In conclusion, study results suggested that the SRH has good validity and reliability in community-dwelling older adults. 

Conclusions. The study results showed that the SRH has good level of validity and reliability among Iranian community-dwelling older adults. Due to being its easy-to-use and cost-effective, the SRH can be employed in health surveys among community-dwelling older adults. 

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