RESUMO
The present study was designed to validate an English version of the mental health literacy scale into Persian, in Iran. Statistical population consisted of all residents of 22 municipal districts of Tehran, Iran, in 2018. Multistage sampling methods were used (sample size = 1026). All participants filled the Mental Health Literacy scale; 12-item General Health Questionnaire; Multidimensional Health Locus of Control scale and a demographic checklist. Exploratory and confirmatory factor analysis, the intra-class correlation coefficient was used for analysing data. All analyses were run with SPSS and AMOS Graphics version 18. Exploratory factor analysis revealed five components (24 items) explaining 21.68%, 20.24%, 8.97%, 6.48% and 5.36% of the variance respectively (totally explained variance = 62.74%). Confirmatory factor analysis showed an acceptable goodness-of-fit (CMIN/DF = 3.19, GFI = 0.887, CFI = 0.893, IFI = 0.894, TLI = 0.877, RMSEA = 0.065). The values of Cronbach's alpha showed satisfactory internal consistency. Two clinical correlates of mental health literacy were investigated. The structure of the mental health literacy scale was to some extent different from the one in O'Connor et al. study, but it was consistent with the definition of MHL presented by Jorm et al. This is the first Persian version of the MHL in the general population in Iran and undoubtedly needs to be checked on more studies.