Table 2.
Polysomnographic variables of the good and poor adherence groups
| Total (n=173) | Good (n=44) | Poor (n=129) | p value | |
|---|---|---|---|---|
| Sleep latency (min) | 9.6±10.2 | 11.7±13.0 | 8.9±8.9 | 0.111 |
| REM sleep latency (min) | 138.2±80.4 | 153.4±83.5 | 132.8±79.0 | 0.112 |
| TST (min) | 395.6±64.1 | 386.3±65.7 | 398.7±63.6 | 0.103 |
| Sleep efficiency (%) | 86.6±11.8 | 84.5±12.7 | 87.3±11.4 | 0.124 |
| Stage REM % of TST (%) | 16.4±6.7 | 16.2±6.3 | 16.4±6.9 | 0.822 |
| Stage 1+2 % of TST (%) | 81.9±8.0 | 82.3±6.5 | 81.8±8.5 | 0.694 |
| Stage 3+4 % of TST (%) | 1.7±3.6 | 1.5±3.2 | 1.8±3.8 | 0.258 |
| REM-AHI (events/h) | 39.0±18.7 | 38.3±16.1 | 39.3±19.5 | 0.506 |
| NREM-AHI (events/h) | 33.9±12.7 | 36.5±10.9 | 32.9±13.1 | 0.043* |
| REM- mean respiratory event duration (sec) | 32.7±21.4 | 32.5±10.7 | 32.8±24.1 | 0.944 |
| NREM-mean respiratory event duration (sec) | 26.8±26.7 | 33.2±51.8 | 24.7±6.0 | 0.392 |
| REM-% of respiratory event duration (%) | 33.2±15.2 | 34.4±16.0 | 32.7±15.0 | 0.536 |
| NREM-% of respiratory event duration (%) | 23.6±11.3 | 26.6±12.8 | 22.6±10.7 | 0.056 |
| REM-min SpO2 (%) | 79.9±10.8 | 78.0±12.0 | 80.6±10.3 | 0.214 |
| NREM- min SpO2 (%) | 83.6±7.0 | 82.3±8.0 | 84.1±6.6 | 0.089 |
| REM-ODI (events/h) | 37.3±19.1 | 36.9±16.2 | 37.4±20.0 | 0.882 |
| NREM-ODI (events/h) | 29.4±13.3 | 32.8±11.9 | 28.3±13.7 | 0.011* |
| REM-CT90 (%) | 11.5±14.3 | 12.4±12.7 | 11.1±14.9 | 0.26 |
| NREM-CT90 (%) | 1.6±4.2 | 4.8±7.0 | 0.6±1.8 | <.001* |
| RERA index (events/h) | 38.1±13.2 | 39.2±9.1 | 37.7±14.3 | 0.367 |
| LMI (events/h) | 10.5±23.6 | 10.5±23.4 | 10.6±23.7 | 0.554 |
Date are presented as mean ± standard deviation. The two-sample t-test or the Mann–Whitney U test was used for continuous variables.
REM: rapid eye movement sleep; NREM: non-rapid eye movement sleep; AHI: apnea–hypopnea index; ODI: oxygen desaturation index; CT90: cumulative percentage of time spent at saturations below 90%; LMI: leg movement index.
*p < 0.05 comparing the good and poor adherence groups.