Author | Metabolic operation | No of subjects | Follow-up (months) | BMI (kg/m2) | AHI (/h) | ||
Preop | Postop | Preop | Postop | ||||
Harman et al, 198229 | Jejuno-ileal bypass | 4 | 24 | NS | NS | 78 | 1.4 |
Peiser et al, 198423 | RYGB | 15 | 2–4 | NS | NS | 81.9 | 15.0 |
Peiser et al, 198423 | RYGB | 6 | 4–8 | NS | NS | 81.9 | 5.5 |
Charuzi et al, 198526 | RYGB | 13 | 6 | NS | NS | 88.8 | 8.0 |
Charuzi et al, 198724 | RYGB, VBG | 46 | 6 | NS | NS | 58.8 | 36.1 |
Rubinstein et al, 198816 | VBG or diet (unknown split) | 12 | NS | 41 | 32 | 57 | 14 |
Summers et al, 199052 | VBG | 1 | 4 | 54 | 37 | 40 | <5 |
Rajala et al, 1991* 15 | VBG | 3 | NS | 52.2 | 34.23 | 44.67 | 5.33 |
Charuzi et al, 199225 | RYGB, VBG | 47 | 10.65 | NS | NS | 60.8 | 8.0 |
Charuzi et al, 199225 | RYGB, VBG | 6 | 12 | NS | NS | 60.3 | 12.4 |
Charuzi et al, 199225 | RYGB, VBG | 6 | 84 | NS | NS | 60.3 | 34.5 |
Sugerman et al, 1992* 34 | RYGB, VBG, HG | 40 | 54 | 58 | 39 | 64 | 26 |
Pillar et al, 199432 | RYGB, VBG | 14 | 4.5 | 45 | 33 | 40 | 11 |
Pillar et al, 1994* 32 | RYGB, VBG | 14 | 90 | 45 | 35 | 40 | 24 |
Noseda et al, 199653 | VBG + CPAP Diet + CPAP | 39 (3 VBG, 36 diet) | 12 | NS | NS | 66.5 | 50.3 |
Scheuller and Weider, 200154 | BPD, VBG | 15 | 12–144 | NS | NS | 96.9 | 11.3 |
Rasheid et al, 2003* 55 | RYGB | 11 | 3–21 | 62 | 40 | 56 | 23 |
Guardiano et al, 2003* 56 | RYGB | 8 | 28 | 49 | 34 | 55 | 14 |
Valencia-Flores et al, 2004* 35 | RYGB, VBG | 29 | 13.7 | 56.5 | 39.2 | 53.7 | 13.7 |
Busetto et al, 2005* 57 | Intragastric balloon | 17 | 6 | 55.8 | 48.6 | 59.3 | 14 |
Dixon et al, 2005* 27 | Gastric banding | 25 | 17.7 | 52.7 | 37.2 | 61.6 | 13.4 |
Lankford et al, 200558 | RYGB | 15 | 12 | 48 | 32 | 40 (CPAP:11 cm H20) | NA (CPAP:9 cm H20) |
Kalra et al, 200559 | RYGB | 10 | 5.1 | 60.8 | 41.6 | 9.1 (median) | 0.65 (median) |
Poitou et al, 2006* 60 | RYGB, gastric banding | 35 | 12 | 51.3 | 39.9 | 24.5 | 9.7 |
Haines et al, 2007* 28 | RYGB | 101 | 6–42 | 56 | 38 | 51 | 15 |
Grunstein et al, 200750 (SOS Study) | RYGB, VBG, gastric banding | 1592 | 24 | 42.2 | 32.5 | 24 (frequency apnoeas) | 8.3 (frequency apnoeas) |
Fritscher et al, 200761 | RYGB | 12 | 24.2 | 55.5 | 34.1 | 46.5 median (range 33–140) | 16.0 median (range 0.9–87) |
Martí-Valeri et al, 2007* 31 | RYGB | 30 | 12 | 56.53 | 32.12 | 63.59 | 17.45 |
Valera et al, 200762 | RYGB | 56 | 12 | 49 | NS | 35 | NS |
Kuzniar et al, 200863 | NS | 1 | 7 | 44.5 | 29.4 | 44 (CPAP:16 cm H2O) | NS (CPAP:8 cm H2O) |
Lettieri et al, 2008* 30 | Gastric banding | 24 | 12 | 51 | 32.1 | 47.9 | 24.5 |
Rao et al, 200933 | Gastric banding | 46 | 12.6±20 | 45.2 | 30 | 38.11 | 13.18 |
Pallayova et al, 2011* 64 | RYGB, SG, BPD-DS | 23 | 12 | 52.3 | 35.7 | 45.6 | 10.1 |
Weighted mean (random effects) postoperative change | ↓16.09 | ↓34.22 |
↵* Studies reporting the postoperative changes of both BMI and AHI which were subsequently included in the analysis to derive the weighted mean change of BMI and AHI.
AHI, apnoea-hypopnoea index; BMI, body mass index; BPD, biliopancreatic diversion; CPAP, continuous positive airway pressure; DS, duodenal switch; HG, horizontal gastroplasty; NS, not specified; RYGB, Roux-en-Y gastric bypass; SG, sleeve gastrectomy; VBG, vertical banded gastroplasty.