Abstract
Background. Many institutions mandate preoperative weight loss prior to bariatric surgery. This study examines the correlation between preoperative weight change and postoperative success following laparoscopic Roux-en-Y gastric bypass. Methods. We retrospectively studied the correlation between change in BMI before surgery and change in BMI postoperatively, using linear regression analyses and one-way ANOVA, in 256 consecutive gastric bypass patients with 1-year followup. Results. Of 256 patients, 125 lost weight preoperatively (mean −1.7% BMI), while 131 maintained or gained weight (mean +1.2% BMI). Postoperatively, there was no significant difference in percent BMI loss between the two groups (34.6% and 34.5%). The percent change in BMI preoperatively did not predict postoperative BMI change after 1 year (P = n.s.). Conclusions. Our study did not show any correlation between preoperative weight change and postoperative weight loss after Roux-en-Y gastric bypass. Therefore, we do not believe that potential patients should be denied bariatric surgery on the basis of their inability to lose weight preoperatively.
Highlights
Obesity is a continuing and worsening health problem in the United States
This study examines the correlation between preoperative weight change and postoperative success following laparoscopic Roux-en-Y gastric bypass
We retrospectively studied the correlation between change in body mass index (BMI) before surgery and change in BMI postoperatively, using linear regression analyses and one-way analysis of variance (ANOVA), in 256 consecutive gastric bypass patients with 1-year followup
Summary
Obesity is a continuing and worsening health problem in the United States. The problem has reached epidemic proportions with nearly 20% of the American population affected, and representing a significant proportion of the total health care costs [1, 2]. Exercise, and pharmacotherapy are the mainstay of the initial approach to the obese patient. These modalities, separately or in combination, typically produce only a modest weight loss in the range of 2-10% excess weight loss in 1 year [4]. This study examines the correlation between preoperative weight change and postoperative success following laparoscopic Roux-en-Y gastric bypass. We retrospectively studied the correlation between change in BMI before surgery and change in BMI postoperatively, using linear regression analyses and one-way ANOVA, in 256 consecutive gastric bypass patients with 1-year followup. Our study did not show any correlation between preoperative weight change and postoperative weight loss after Roux-en-Y gastric bypass. We do not believe that potential patients should be denied bariatric surgery on the basis of their inability to lose weight preoperatively
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