Intervention based on Transtheoretical Model promotes anthropometric and nutritional improvements - a randomized controlled trial.

OBJECTIVE To analyze the effects of an intervention based on the Transtheoretical Model on anthropometric and dietetic profile among women in the Primary Health Care in Brazil. DESIGN AND METHODS Randomized controlled trial. The control group participated in physical activity and open group-education regarding nutrition of usual care. The intervention group participated in 10 workshops based on the Transtheoretical Model. RESULTS Seventy-one women completed the study, with a mean age of 57.9±11.7years. Participants in the intervention group showed an improved body perception, reduced weight and body mass index post-intervention, and lower consumption of calories and foods high in fat. Significant weight reduction in the intervention group was associated with higher per capita income, reduced consumption of protein, reduced consumption of lipids, and the removal of visible fat from red meat and skin from chicken. CONCLUSION An intervention based on the Transtheoretical Model promoted reduction in consumption of foods high in calories and fat, with positive effects on weight and body perception. These results provide evidence of the applicability and benefit of the Transtheoretical Model within primary care.