Table 1. Baseline characteristics of the patients screened for obstructive sleep apnea.a .
| Characteristic | All patients | Without OSA | With OSA | p-value |
|---|---|---|---|---|
| AHI < 5 events/h | AHI ≥ 5 events/h | |||
| (n = 456) | (n = 99) | (n = 357) | ||
| Age (years), mean ± SD | 43.7 ± 12.5 | 36.4 ± 12.4 | 44.9 ± 12.2 | < 0.001 |
| BMI (kg/m2), mean ± SD | 32.1 ± 7.8 | 29.6 ± 7.0 | 32.7 ± 7.9 | 0.001 |
| NC (cm), mean ± SD | 40.8 ± 4.3 | 38.1 ± 3.8 | 41.6 ± 4.2 | < 0.001 |
| AHI (events/h), mean ± SD | 24.6 ± 25.2 | 2.1 ± 1.4 | 30.9 ± 25.1 | < 0.001 |
| STOP-Bang items | ||||
| Snoring (loud) | 313 (68.6) | 55 (55.6) | 258 (72.3) | 0.002 |
| Tiredness | 270 (59.2) | 57 (57.6) | 213 (59.7) | 0.730 |
| Observed apnea | 216 (47.4) | 29 (29.3) | 187 (52.4) | < 0.001 |
| Pressure (hypertension) | 160 (35.1) | 20 (20.2) | 140 (39.2) | < 0.001 |
| BMI (> 35 kg/m2) | 129 (28.3) | 26 (26.3) | 103 (28.9) | 0.705 |
| Age (> 50 years) | 151 (33.1) | 22 (22.2) | 129 (36.1) | 0.011 |
| NC (> 40 cm) | 236 (51.8) | 24 (24.2) | 212 (59.4) | < 0.001 |
| Gender (male) | 291 (63.8) | 45 (45.5) | 246 (68.9) | < 0.001 |
OSA: obstructive sleep apnea; BMI: body mass index; NC: neck circumference; and AHI: apnea-hypopnea index. aData are presented as n (%), except where otherwise indicated.