Weight loss after bariatric surgery: a propensity score analysis.

Area of Science:

• Bariatric surgery outcomes
• Comparative effectiveness research
• Obesity treatment

Background:

• Laparoscopic sleeve gastrectomy (LSG) is now the most common bariatric procedure in the US.
• Predicting optimal outcomes for bariatric surgery remains a challenge.
• This study compares outcomes of LSG and laparoscopic Roux-en-Y gastric bypass (LRYGB) and identifies predictors of success.

Purpose of the Study:

• Compare 90-day and 1-year outcomes between LSG and LRYGB.
• Identify predictors of surgery type selection.
• Identify predictors of excess body weight loss (EBWL) greater than 50%.

Main Methods:

• Retrospective review of electronic health records for 270 LRYGB and 74 LSG patients (2010-2014).
• Propensity score adjustment used to control for patient characteristics.
• Multivariable analysis to identify predictors of EBWL >50%.

Main Results:

• Similar 90-day complication rates for LSG and LRYGB.
• LRYGB patients had more ED visits (27.1% vs 14.1%), but similar readmission rates.
• Lower BMI (OR 3.00), absence of type 2 diabetes (OR 2.55), and LRYGB (OR 5.29) predicted EBWL >50%.

Conclusions:

• LSG and LRYGB demonstrate comparable complication rates.
• Lower BMI and absence of type 2 diabetes are key predictors of significant weight loss.
• Preoperative patient counseling should incorporate these factors to set realistic expectations.