Preoperative predictors of weight loss at 4 years following bariatric surgery

Nutr Clin Pract. 2015 Jun;30(3):420-4. doi: 10.1177/0884533614568154. Epub 2015 Jan 28.


Background: This study evaluated the influence of patient characteristics, preoperative weight loss, and type of surgical procedure on long-term weight loss after bariatric surgery (BS).

Methods: Subjects were a prospective cohort of 95 patients who underwent BS with 4 years of follow-up. Seventy-seven patients (81.1%) underwent laparoscopic Roux-en-Y gastric bypass, and 18 (18.9%) had laparoscopic sleeve gastrectomy. Age, gender, initial body mass index (BMI), preoperative percentage of excess weight loss, presence of type 2 diabetes mellitus, current smoking status, and surgical technique were analyzed via multivariate linear regression analysis to identify predictors of weight loss during the 4 years after the surgery.

Results: Maximum percentage of excess weight loss was obtained at 18 months. Age and preoperative BMI were negatively associated with percentage of excess weight loss at 1, 2, 3, and 4 years after BS (P < .005). At 4 years, laparoscopic Roux-en-Y gastric bypass was independently associated with a higher weight loss than laparoscopic sleeve gastrectomy (P < .05).

Conclusions: Younger age, lower BMI, and laparoscopic Roux-en-Y gastric bypass are independent predictors of long-term weight loss after BS.

Keywords: bariatric surgery; obesity; weight loss.

MeSH terms

  • Adult
  • Age Factors
  • Body Mass Index
  • Female
  • Follow-Up Studies
  • Gastric Bypass / methods*
  • Humans
  • Laparoscopy / methods*
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Preoperative Care
  • Prospective Studies
  • Weight Loss*