[Analysis of the bariatric surgery impact in a population from the center area of Rio Grande do Sul State, Brazil, using the BAROS method].

Context: Due to metabolic alterations caused by overweight, the bariatric surgery has been a largely used procedure in order to propitiate long term weight loss and maintenance in a population with morbid obesity.

Objective: To analyze the impact of bariatric surgery in a population from the center area of Rio Grande do Sul State, Brazil, using the BAROS method.

Method: It was carried out a retrospective study with 32 patients from both sexes, aging between 19 and 44 years old who were patients from a private clinic at the city of Santa Maria, RS. The patients' weight variation and the body mass index were analyzed, as well as their intestinal habit, use of tobacco and practice of physical activity to compare the results in pre and postoperative periods. The patients were divided into groups: group A (preoperative), group B (up to 6 months of postoperative period), group C (7 to 8 months of postoperative period), and group D (19 to 30 months of postoperative period). To evaluate the efficacy of the bariatric surgery BAROS method was applied. Statistical analysis was performed using analysis of variance (ANOVA), followed by post-hoc by Duncan's. It were considered as statistically significant the data with P<0.05. The results were expressed as mean +/- SEM RESULTS: The patients presented a significant weight-loss, in preoperative the average was 118.8 kg (+/- 2.89) and, in postoperative period, group B showed 89 kg (+/- 5.69), group C 76.8 kg (+/- 4.85) and, group D 76 kg (+/- 4.46), demonstrating a gradual weight loss. Likewise, the body mass index presented a significant reduction in groups B, C e D in relation to group A. The patients showed an intestinal habit improvement of 15.6% in postoperative period in relation to the preoperative period. As for the use of tobacco it was observed a decrease of 33.3% in postoperative period. The practice of a physical activity increased in 34.4% among the patients after surgery. According to the BAROS method appliance the patients showed excellent, very good and good classifications and, none of them was classified as insufficient.

Conclusion: The results obtained according to the BAROS method and the patients' evaluated characteristics made it possible to observe that the bariatric surgery presented satisfactory results in this population.