Short-term Weight Loss Outcomes of 104 Mini Gastric Bypass or One Anastomosis Gastric Bypass Operations

Objectives: This study aimed to examine the short-term effects of Mini gastric bypass (MGB) or one anastomosis gastric bypass (OAGB) procedures on weight loss in individuals with obesity. Methods: This retrospective study was conducted in Iraq from January 2019 to May 2020.  104 patients with obesity underwent MGB or OAGB surgery in a single center in Iraq. Preoperative body mass index (BMI), age, height, and preoperative weight were recorded as baseline measures. Weight-related changes were evaluated during a follow-up phase of 48 weeks. Results: The mean baseline parameters of the subjects before surgery included 1.64 meters for height, 122.9 kg for weight, and 45.6 kg/m² for BMI. During the 48-week follow-up period, there was a substantial reduction in mean weight, which dropped from 122.9 kg at baseline to 75.5 kg at week 48. The weight change (in percentage) gradually increased from -11.8% at week 12 to -37.9% at week 48, without statistically significant association with demographic factors or chronic diseases. From week 12 to week 48, the percentage of excess weight loss (%EWL) increased substantially from 26.8% to 86.1%. The results of the subgroup analysis indicated that the %EWL was considerably higher among those aged 30 or older at week 36 and singles at week 48. Conclusion: The results of this study illustrate the efficacy of MGB or OAGB procedures in significantly reducing weight in the short term. The %EWL increased with the follow up time and it was significantly associated with age and marital status.