Predictors of weight status following laparoscopic gastric bypass
Department of Medicine, Division of Preventive and Behavioral Medicine; Department of Surgery
Adult; Age Factors; Aged; Female; Follow-Up Studies; *Gastric Bypass; Humans; *Laparoscopy; Length of Stay; Male; Middle Aged; Obesity, Morbid; Predictive Value of Tests; Sex Factors; Treatment Outcome; *Weight Loss
Behavioral Disciplines and Activities | Behavior and Behavior Mechanisms | Community Health and Preventive Medicine | Preventive Medicine
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/m(2). 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 (> or = 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.
DOI of Published Version
Obes Surg. 2006 Sep;16(9):1227-31. Link to article on publisher's site
Ma Y, Pagoto SL, Olendzki BC, Hafner AR, Perugini RA, Mason R, Kelly JJ. (2006). Predictors of weight status following laparoscopic gastric bypass. Preventive and Behavioral Medicine Publications. https://doi.org/10.1381/096089206778392284. Retrieved from https://escholarship.umassmed.edu/prevbeh_pp/16