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Indications for and results of laparoscopic adjustable gastric banding (LAGB) and laparoscopic gastric bypass (LGB) are still controversial, especially between Europe and the United States. The recent availability of gastric bandings in the United States made it necessary to compare the two techniques.

We compared a series of 456 LGB to a series of 805 LAGB performed in two different institutions. Body mass index (BMI), complication rate, mortality, and excess weight loss (EWL) after 3, 6, 12, and 18 months were obtained. A Fischer's exact test and a Student t test with covariance analysis were used for statistical analysis.

Results are expressed as a mean ± standard deviation, comparing LGB with LAGB. Preoperative BMI was 49.4 ± 8.3 kg/m² versus 42.2 ± 4.9 kg/m² (p = 0.0001), respectively. Perioperative major complication rates were 2.0% versus 1.3% (NS), and …