Table 6.
Comparison of PSG sleep architectural variables across diagnostic PSG and titration study (CPAP, ASV, and ASV manual (PSmin 6)) nights
| Diagnostic PSG (N = 31) | CPAP (N = 31) | ASV (N = 31) | ASV manual (PSmin 6) (N = 31) | Overall p value (Friedman test) | |
|---|---|---|---|---|---|
| Arousal index | 20.3 (22.9 ± 13.8) | 11.8 (14.9 ± 8.0) | 16.6 (17.7 ± 9.4) | 16.1 (19.2 ± 11.7) | 0.028 a |
| Total sleep time (TST) (min) | 407.0 (409 ± 57.8) | 387.0 (386.8 ± 60.2) | 376.5 (377.6 ± 85.0) | 385.0 (380.4 ± 67.2) | 0.798 |
| Sleep efficiency (%) | 89.1 (87.9 ± 8.3) | 90.0 (86.8 ± 9.7) | 87.7 (83.3 ± 13.9) | 86.7 (84.9 ± 10.2) | 0.419 |
| Wake after sleep onset (min) | 39.6 (47.4 ± 33.5) | 37.1 (50.6 ± 40.6) | 45.8 (62.3 ± 50.9) | 51.2 (59.0 ± 42.1) | 0.313 |
| Stage 1 (% TST) | 7.8 (11.0 ± 10.2) | 5.6 (8.4 ± 6.9) | 6.8 (9.2 ± 8.5) | 7.3 (9.4 ± 7.0) | 0.201 |
| Stage 2 (% TST) | 70.9 (73.3 ± 13.0) | 78.3 (76.2 ± 12.2) | 74.3 (73.2 ± 11.1) | 78.1 (77.0 ± 11.2) | 0.206 |
| Stage 3/4 (% TST) | 0.2 (4.3 ± 7.1) | 0.8 (3.6 ± 5.8) | 0.6 (5.3 ± 9.5) | 0.3 (3.3 ± 5.8) | 0.296 |
| REM (% TST) | 11.2 (11.4 ± 8.3) | 9.3 (11.8 ± 9.1) | 10.3 (12.3 ± 9.4) | 8.3 (10.3 ± 8.0) | 0.407 |
| Sleep onset latency (min) | 4.0 (9.0 ± 12.1) | 4.6 (8.8 ± 10.5) | 4.3 (12.9 ± 28.4) | 4.0 (9.0 ± 13.6) | 0.575 |
Data are expressed as median (mean ± standard deviation)
aPairwise comparisons, using the Wilcoxon signed-rank test and undergoing Bonferroni adjustment, indicated that the arousal index was significantly (p = 0.021) greater during ASV manual (PSmin 6) titration compared to CPAP. No significant differences were noted for CPAP versus ASV manual (PSmin 6) (p = 0.288) or ASV versus ASV manual (PSmin 6) (p > 0.99)