Table 3.
Comparison of the polysomnographic data between the compliant and non-compliant with CPAP groups
| Variables | Compliant (N=80) | Non-compliant (N=108) | Statistics† |
|---|---|---|---|
| Apnea hypopnea index | 45.2±23.6 | 47.0±24.5 | t=0.53, p=0.597 |
| O2 saturation nadir | 74.9±13.0 | 76.8±10.6 | t=1.11, p=0.267 |
| CPAP pressure, cm H2O | 8.6±1.5 | 8.9±1.8 | t=-1.21, p=0.227 |
| Total sleep time (min.) | 339.4±338.8 | 338.8±58.1 | t=-0.07, p=0.946 |
| Sleep efficiency (%) | 82.8±11.8 | 83.0±11.9 | t=0.15, p=0.884 |
| Wake after sleep onset (%) | 15.4±11.5 | 14.5±11.0 | t=-0.55, p=0.585 |
| Sleep onset latency | 8.9±9.8 | 11.1±19.9 | t=0.88, p=0.380 |
| REM sleep latency | 138.5±89.6 | 146.6±86.2 | t=0.62, p=0.533 |
| PLMS (N/h) | 3.2±8.5 | 3.4±10.8 | t=0.11, p=0.915 |
| Total Arousal Index (N/h) | 41.4±20.7 | 38.6±21.9 | t=-0.89, p=0.375 |
| Loudness of snoring sound‡ | 1.8±0.5 | 1.9±0.5 | t=1.61, p=0.109 |
| Sleep architecture | |||
| Stage N1 (%) | 31.2±16.3 | 26.6±14.5 | t=-2.06, p=0.041* |
| Stage N2 (%) | 46.9±16.1 | 45.2±114.9 | t=-0.75, p=0.455 |
| Stage N3 (%) | 3.0±7.0 | 2.1±3.6 | t=-1.11, p=0.268 |
| Stage R (%) | 13.0±6.2 | 13.1±6.5 | t=0.12, p=0.907 |
Data are mean±standard deviation values.
*
p<0.05;
†
independent t-test;
‡
loudness of the snoring sound during polysomnography: 0, no snoring; 1, soft snoring; 2, loud snoring.
CPAP, continuous positive airway pressure; N/h, number per hour; PLMS, periodic limb movements during sleep; REM, rapid eye movement