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Meta-analysis pooled effect sized (%EWL), heterogeneity and publication bias
| Operation | Studies (N) | Patients at follow-up | Pooled effect size (95% CI) | Q | I 2 (%) | Egger’s regression intercept |
|---|---|---|---|---|---|---|
| RYGB | 9 | 1326 | 60.05 (54.74, 65.37) | 105.63* | 92.43 | − 3.33, p = .575 |
| LAGB | 13 | 485 | 48.84 (42.75, 54.93) | 80.79* | 85.15 | − 1.31, p = .262 |
| BPD/DS | 7 | 393 | 71.00 (62.33, 79.67) | 108.63* | 94.48 | − 3.33, p = .575 |
| Gastroplasty | 4 | 448 | 53.54 (45.78, 61.30) | 39.01* | 92.31 | − 5.13, p = .492 |
*p < .001
