Psychometric Properties of the Persian Version of Weight Effcacy Lifestyle Questionnaire‑Short Form

Abstract

Background: Currently, in low‑ and middle‑income countries, the problem of overweight and obesity is increasing at alarming rate. Along with well‑known factors, psychosocial factors such as low self‑effcacy highly associated with these problems. Hence, it is necessary to assess individual self‑effcacy in weight management consultations using valid instrument. The aim of this study
was to determine psychometric properties of the Persian version of the Weight Effcacy Lifestyle Questionnaire‑Short Form (WEL‑SF).

Methods: A cross‑sectional study carried out on 400 women referring to urban community health centers in Kerman Province, Iran. Data collected using a
questionnaire contained demographic data and Persian version of WEL‑SF. The reliability of the questionnaire determined using Cronbach’s alpha. The construct validity evaluated by exploratory principal component analysis (PCA) and confrmatory factor analysis. Data were analyzed by SPSS version 19 and Lisrel 8.8.

Results: Internal consistency of WEL‑SF was 0.83 using Cronbach’s alpha. In the PCA, two factors were extracted with the total amount of 62.6% explained variance.
In confrmatory factor analysis, the model had acceptable goodness of ft indices.

Conclusions: The Persian version of WEL‑SF had excellent psychometric properties.

Keywords: Body weight, reliability, self‑effcacy, validity