Table 1. Characteristics of the studies included in the meta-analysis.
| Author | Year | Country | Study design | Number of patients | Operative characteristics | Follow-up duration |
|---|---|---|---|---|---|---|
| Svensson et al. | 2013 | Sweden | Prospective cohort study | 4,037 | Vertical banded gastroplasty =1,369; RYGB =265; LAGB =376 |
8–22 years |
| King et al. | 2012 | United States | Prospective cohort study | 1,945 | RYGB =69.6%; LAGB =25.2%; Other =4.9% |
1 year |
| Wee et al. | 2014 | United States | Prospective cohort study | 541 | RYGB =55%; LAGB =44%; Other =1% |
2 years |
| Alfonsson et al. | 2014 | Sweden | Prospective cohort study | 129 | RYGB | 1 year |
| Buffington | 2007 | United states; Northern Europe; Israel | Cross-sectional | 318 | RYGB =97%; Other =3% |
≥1 year |
| Adams et al. | 2012 | United States | Medical records review | 61 | LAGB =59%; RYGB = LAGB |
2 years |
| Suzuki et al. | 2012 | United States | Cross-sectional | 51 | RYGB =54.9%; LAGB =45.1% |
RYGB mean =42.6 months; LAGB mean =44 months |
| Ertelt et al. | 2008 | United States | Cross-sectional | 70 | RYGB | 6–10 years |
| Cuellar-Barboza et al. | 2015 | United States | Medical records review | 823 | RYGB | ≥3 years |
| Mitchell et al. | 2001 | United States | Cross-sectional | 78 | RYGB | 13–15 years |
LAGB, laparoscopic adjustable gastric banding; RYGB, Roux-en-Y gastric bypass.