Psychometric Properties of Quality of Life Scale (ESQoL) for Iranian Elementary School Students

The primary objective of this study was to assess the psychometric properties of the Elementary School Quality of Life (ESQoL) questionnaire among elementary school students in Faryab, Iran. The ESQoL, originally developed by Huang et al. in Taiwan, consists of 21 items. The study population included 1,800 individuals, with a sample size of 200 elementary school students (comprising 100 females and 100 males). Cluster random sampling was utilized to select classes from nine different elementary schools, encompassing both female and male students. Confirmatory factor analysis was employed to establish the validity of the questionnaire, while reliability was assessed using Cronbach's alpha and test-retest methods. The results of confirmatory factor analysis confirmed the presence of six scales within the questionnaire items, which included school function, family function, environmental life, vitality for life, learning ability, and peer relationships. The outcomes of the confirmatory factor analysis indicated that the model exhibited a satisfactory fit. Additionally, the quality of life questionnaire demonstrated strong internal consistency and test-retest reliability. Pearson's correlation coefficients, assessed over a two-week interval with 30 participants, ranged from 0.40 for the vitality for life and family function scales to 0.75 for the learning ability scale. In summary, this study's findings affirm the questionnaire's favorable validity and reliability for assessing the quality of life among elementary school students in Iran.