Table 1.
Demographic and preoperative clinical characteristics of morbidly obese patients according to OSA categories
| Demographics and preoperative characteristics | Total (N = 218) | OSA* |
p value§ | |
|---|---|---|---|---|
| none/mild (N = 125) | moderate/severe (N = 93) | |||
| Age, years | 48.2 ± 10.8 | 47.7 ± 11.1 | 48.9 ± 10.4 | 0.484 |
| Female gender | 169 (77.5) | 106 (84.8) | 63 (67.7) | 0.003 |
| BMI, kg/m2 | 47.9 ± 9.1 | 47.0 ± 7.6 | 49.2 ± 10.8 | 0.407 |
| Superobese (BMI ≥ 50 kg/m2) | 74 (33.9) | 38 (30.4) | 36 (38.7) | 0.247 |
| Diabetes mellitus | 73 (33.5) | 39 (31.2) | 34 (36.6) | 0.469 |
| Hypertension | 125 (57.3) | 70 (56) | 55 (59.1) | 0.679 |
| Coronary artery disease | 23 (10.6) | 9 (7.2) | 14 (15.1) | 0.076 |
| Heart failure | 5 (2.3) | 4 (3.2) | 1 (1.1) | 0.396 |
| Asthma | 52 (23.9) | 29 (23.2) | 23 (24.7) | 0.873 |
| COPD | 6 (2.8) | 4 (3.2) | 2 (2.2) | 1.000 |
| Cerebrovascular disease | 7 (3.2) | 3 (2.4) | 4 (4.3) | 0.463 |
| Serum creatinine | 0.9 ± 0.3 | 0.9 ± 0.2 | 0.9 ± 0.3 | 0.855 |
| Serum AST, U/l† | 28 ± 12 | 28 ± 11 | 28 ± 13 | 0.909 |
| Patients with AST above normal | 16 (8.3) | 9 (8.0) | 7 (8.8) | 1.000 |
| Serum ALT, U/l‡ | 37 ± 22 | 36 ± 24 | 38 ± 19 | 0.265 |
| Patients with ALT above normal | 31 (23.1) | 18 (22.5) | 13 (24.1) | 0.837 |
aData are N (%) or mean ± standard deviation.
COPD = Chronic obstructive pulmonary disease; AST = aspartate aminotransferase; ALT = alanine aminotransferase
§
Characteristics were compared between groups using the rank sum test for continuous variables and Fisher's exact test for nominal variables.
*
None/mild OSA (AHI ≤ 15); moderate/severe OSA (AHI ≥ 16).
†
Normal, 8–43 U/l; AST was available for 192 patients.
‡
Normal, 7–45 U/l; ALT was available for 134 patients.