Effect of Counseling based on Information-Behavioral Motivation Model on Health Promoting Lifestyle Behaviors and Psychological Well-being in Obese and Overweight Pregnant Women: A Randomized Clinical Trial

Background and purpose: Physiological changes in pregnancy cause profound challenges to mental health. The aim of this study was to investigate the effect of counseling based on Information-Behavioral Motivation Model on health promoting lifestyle behaviors and psychological well-being in overweight and obese pregnant women. Materials and methods: This randomized clinical trial was performed in 137 pregnant women with a BMI ≥25 and 12 to 16 weeks gestational age. The participants were divided into two groups of counseling (n=67) and routine care (n=70). The counseling group attended four sessions of counseling based on the Information-Behavioral Motivation Model, while the other group received routine care. Demographic information was recorded and Health-Promoting Lifestyle Profile [HPLP II] and Ryff's Psychological Well-being scale were completed before and 8 weeks after the intervention. Descriptive and inferential tests, ANOVA, and Multivariate Covariance Analysis (MANCOVA) were used to analyze the data. Results: Using the ANCOVA and MANCOVA test after adjusting the pre-intervention scores in both groups, the mean scores for health-promoting lifestyle behaviors and psychological well-being were found to be higher in intervention group compared to those in the group that received routine care (158.72±24.15 vs 141.29±24.88, P <0.001, d= 0.77 and 75.92 ± 7.87 vs. 72.17 ± 11.88, P= 0.04, d= 0.23, respectively). Conclusion: Consultation based on Information-Behavioral Motivation Model improves health-promoting lifestyle and promotes level of mental well-being.   (Clinical Trials Registry Number: IRCT20120125008822N3)