Table 1.
Baseline patient characteristics
| Characteristics | Total | Control (AHI<5) | Mild OSA (5≤AHI<15) | Moderate OSA (15≤AHI<30) | Severe OSA (30≤AHI) | P-value |
|---|---|---|---|---|---|---|
| Number of cases | 6,140 | 784 | 941 | 1,280 | 3,135 | <0.001 |
| Age (yr) | 45.09±14.21 | 35.65±13.37 | 42.51±14.26 | 46.45±13.97 | 47.66±13.37 | <0.001a) |
| BMI (kg/m2) | 25.56±4.04 | 22.57±3.11 | 24.06±3.43 | 25.03±3.41 | 26.97±4.04 | <0.001a) |
| Male (%) | 78.5 | 49.7 | 68.2 | 78.1 | 88.9 | <0.001b) |
| TST (min) | 302.53±62.84 | 322.72±61.11 | 319.40±60.63 | 313.22±62.23 | 288.05±60.63 | <0.001a) |
| AHI (events/hr) | 35.57±27.03 | 1.96±1.46 | 9.76±2.97 | 22.20±4.31 | 57.18±19.93 | <0.001a) |
| Exhibiting POSA (%) | 70.2 | - | 85.9 | 84.3 | 59.8 | <0.001b) |
Values are presented as mean±standard deviation unless otherwise indicated.
AHI, apnea–hypopnea index; OSA, obstructive sleep apnea; BMI, body mass index; TST, total sleep time; POSA, positional obstructive sleep apnea.
a)
Analysis of variance.
b)
Chi-square test.