Table 4.
Univariate analysis: Variables affecting dropout of CPAP (CPAP titration)
| CPAP titration | Patients refusing CPAP (n = 56) | Patients accepting CPAP (n = 125) | Hazard ratio (95% CI) | P value |
|---|---|---|---|---|
| AHI (/h) | 6.2 (3.8–12.8) | 7.2 (3.9–9.9) | 1.00(0.97–1.04) | 0.954 |
| AI (/h) | 0.6 (0.2–1.7) | 0.5 (0–1.2) | 1.03(0.96–1.11) | 0.394 |
| HI (/h) | 5.3 (3.3–8.4) | 5.3 (3.4–8.7) | 0.99(0.95–1.04) | 0.746 |
| Minimum SaO2 (%) | 90 (88–93) | 90 (87–92) | 1.03(0.97–1.09) | 0.403 |
| Time (SaO2 < 90%) (min) | 0 (0–1.1) | 0 (0–1.0) | 0.96(0.90–1.04) | 0.374 |
The value of each item is indicated by the median value (interquartile range)
AHI Apnea–hypopnea Index, AI Apnea Index, HI Hypopnea Index, CPAP continuous positive airway pressure, PSG polysomnography, OSA obstructive sleep apnea, Time (SaO2 < 90%) time spent with SaO2 of < 90%