Table 3.
Select Characteristics and 30-Day End Points in LABS-2 Subjects by Metabolic Syndrome Status and Surgical Type
| Non–metabolic syndrome (n=457) | Metabolic syndrome (n=1818) | P value | |
|---|---|---|---|
| Bariatric surgical procedure, % (n) | 0.01 | ||
| LAGB | 28.9 (132) | 23.1 (420) | |
| Lap RYGB | 62.4 (285) | 63.1 (1147) | |
| Open RYGB | 5.3 (24) | 9.0 (163) | |
| SG | 2.0 (9) | 2.6 (48) | |
| Other | 1.5 (7) | 2.2 (40) | |
| Anesthesia risk class, % (n) | <0.001 | ||
| Stage I | 0.2 (1) | 0.1 (2) | |
| Stage II | 43.7 (199) | 26.0 (470) | |
| Stage III | 55.2 (251) | 69.6 (1258) | |
| Stage IV | 0.9 (4) | 4.3 (78) | |
| Duration of surgery (min) | |||
| LAGB | 114 (95, 135) | 118 (97, 145) | 0.16 |
| Lap RYGB | 191.5 (162.5, 222) | 195 (162, 236) | 0.19 |
| Open RYGB | 190 (152, 261) | 169 (140, 224) | 0.51 |
| SG | 177 (159, 213) | 204 (180, 235) | 0.28 |
| Other | 242 (153, 315) | 202.5 (159, 260) | 0.38 |
| Intraoperative events, % (n) | |||
| LAGB | 0.40 | ||
| No | 95.4 (126) | 97.1 (406) | |
| Yes | 4.6 (6) | 2.9 (12) | |
| Lap RYGB | 0.60 | ||
| No | 94.7 (268) | 93.9 (1074) | |
| Yes | 5.3 (15) | 6.1 (70) | |
| Length of stay (days) | |||
| LAGB | 1 (1, 1) | 1 (0, 1) | 0.77 |
| Lap RYGB | 2 (2, 2) | 2 (2, 3) | 0.001 |
| Open RYGB | 4 (3, 4.5) | 4 (3, 4) | 0.63 |
| SG | 2 (2, 3) | 3 (2, 4) | 0.03 |
| Other | 3 (4, 4) | 4 (3, 4) | 0.20 |
| 30-day composite postoperative events, % (n) | |||
| LAGB | |||
| No | 99.2 (130) | 99.0 (416) | 1.0 |
| Yes | 0.8 (1) | 1.0 (4) | |
| Lap RYGB | |||
| No | 96.5 (275) | 95.2 (1092) | 0.35 |
| Yes | 3.5 (10) | 4.8 (55) | |
Values are either median (interquartile range) or percent.
Missing values (n) by characteristic: Duration of surgery, n=60.
Metabolic syndrome was defined as present if three or more of the following five criteria were positive: fasting blood glucose ≥100 mg/dL; elevated blood pressure [systolic blood pressure (SBP) ≥130 and/or diastolic blood pressure (DBP) ≥85 mmHg) or medication for hypertension; fasting triglyceride (TG) levels (≥150 mg/dL); fasting high-density lipoprotein cholesterol (HDL-C) values (<50 mg/dL for females, <40 mg/dL for males), or central obesity (waist circumference >88 cm for females, >102 cm for males). Non–metabolic syndrome was defined as having two or less of the above criteria.
Other surgical procedures include biliopancreactic diversion with duodenal switch and banded gastric bypass.
LABS-2, Longitudinal Assessment of Bariatric Surgery-2; LAGB, laparoscopic adjustable gastric banding; Lap, Laparoscopic; RYGB, Roux-en-Y gastric bypass; SG, sleeve gastrectomy.