Rooyesh-e- Ravanshenasi Journal(RRJ)

The present study aimed to determine the effectiveness of lifestyle education on psychological well-being and illness perception in patients with non-alcoholic fatty liver disease. This research was a quasi-experimental study with a pretest-posttest design and a control group. The statistical population included all patients with non-alcoholic fatty liver disease in Tehran in 2024, from whom 30 individuals were selected through convenience sampling and randomly assigned to two groups (15 in the experimental group and 15 in the control group). The measurement instruments were the Ryff Psychological Well-Being Scale (PWBS-SF, 2002) and the Brief Illness Perception Questionnaire by Broadbent et al. (Brief-IPQ, 2006). The experimental group received lifestyle education intervention over eight weekly sessions, each lasting 90 minutes, while the control group received no intervention. Multivariate analysis of covariance (MANCOVA) was used for data analysis. The results of the covariance analysis showed that, after controlling for the pretest effect, there was a significant difference at the 0.05 level between the posttest means of psychological well-being and illness perception in the experimental and control groups. Based on these findings, it can be concluded that lifestyle education was effective in improving psychological well-being and illness perception in patients with non-alcoholic fatty liver disease.