Obesity Surgery

, Volume 16, Issue 9, pp 1227–1231

Predictors of Weight Status following Laparoscopic Gastric Bypass

  • Authors
  • Yunsheng Ma
  • Sherry L Pagoto
  • Barbara C Olendzki
  • Andrea R Hafner
  • Richard A Perugini
  • Robin Mason
  • John J Kelly

DOI: 10.1381/096089206778392284

Cite this article as:
Ma, Y., Pagoto, S.L., Olendzki, B.C. et al. OBES SURG (2006) 16: 1227. doi:10.1381/096089206778392284

Background: Weight loss after bariatric surgery varies and depends on many factors, such as time elapsed since surgery, baseline weight, and co-morbidities. Methods: We analyzed weight data from 494 patients who underwent laparoscopic Roux-en-Y gastric bypass (RYGBP) by one surgeon at an academic institution between June 1999 and December 2004. Linear regression was used to identify factors in predicting % excess weight loss (%EWL) at 1 year. Results: Mean patient age at time of surgery was 44 ± 9.6 (SD), and the majority were female (83.8%). The baseline prevalence of co-morbidities included 24% for diabetes, 42% for hypertension, and 15% for hypercholesterolemia. Baseline BMI was 51.5 ± 8.5 kg/m2. Mean length of hospital stay was 3.8 ± 4.6 days. Mortality rate was 0.6%. Follow-up weight data were available for 90% of patients at 6 months after RYGBP, 90% at 1 year, and 51% at 2 years. Mean %EWL at 1 year was 65 ± 15.2%. The success rate (≥50 %EWL) at 1 year was 85%. Younger age and lower baseline weight predicted greater weight loss. Males lost more weight than females. Diabetes was associated with a lower %EWL. Depression did not significantly predict %EWL. Conclusion: The study demonstrated a 65 %EWL and 85% success rate at 1 year in our bariatric surgery program. Our finding that most pre-surgery co-morbidities and depression did not predict weight loss may have implications for pre-surgery screening.


Copyright information

© Springer 2006