Predictors of Weight Status following Laparoscopic Gastric Bypass |
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| Authors: | Yunsheng Ma MD PhD Sherry L Pagoto PhD Barbara C Olendzki RD MPH Andrea R Hafner BS Richard A Perugini MD Robin Mason MS NP John J Kelly MD |
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| Institution: | (1) Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA;(2) Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA;(3) Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA;(4) Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA;(5) Department of Surgery, University of Massachusetts Medical School, Worcester, MA, USA;(6) Department of Surgery, University of Massachusetts Medical School, Worcester, MA, USA;(7) Department of Surgery, University of Massachusetts Medical School, Worcester, MA, USA |
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| Abstract: | 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. |
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| Keywords: | MORBID OBESITY BARIATRIC SURGERY GASTRIC BYPASS WEIGHT LOSS MAINTENANCE |
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