Table 5.
Comparison of respiratory variables across diagnostic PSG and titration studies (CPAP, ASV, and ASV manual (PSmin 6))
| Diagnostic PSG (N = 31) | CPAP (N = 31) | ASV (N = 31) | ASV manual (PSmin 6) (N = 31) | p values for pairwise comparisons | ||||
|---|---|---|---|---|---|---|---|---|
| Overall p value (Friedman test) | CPAP vs. ASV | CPAP vs. ASV manual (PSmin 6) | ASV vs. ASV manual (PSmin 6) | |||||
| AHI | 32.5 (38.8 ± 31.1) | 10.1 (17.4 ± 20.1) | 1.4 (4.5 ± 7.3) | 2.1 (7.6 ± 16.7) | <0.001 | <0.001 | 0.009 | >0.99 |
| CAI | 6.4 (16.1 ± 18.8) | 2.4 (8.4 ± 12.4) | 0.0 (0.2 ± 0.8) | 0.0 (0.2 ± 0.9) | <0.001 | <0.001 | <0.001 | >0.99 |
| OAI | 1.9 (9.7 ± 15.2) | 2.8 (4.5 ± 6.3) | 0.0 (0.3 ± 0.5) | 0.0 (0.5 ± 1.1) | <0.001 | <0.001 | <0.001 | >0.99 |
| HI | 10.2 (14.8 ± 12.6) | 2.8 (4.5 ± 5.1) | 1.4 (4.6 ± 7.4) | 3.2 (7.9 ± 16.2) | 0.441 | – | – | – |
| ODIa | 24.2 (32.8 ± 29.2) | 6.0 (15.1 ± 20.2) | 1.9 (5.9 ± 8.6) | 2.6 (9.5 ± 19.2) | 0.161 | – | – | – |
| Av. O2 saturation | 93.4 (92.9 ± 3.4) | 94.9 (94.6 ± 2.3) | 94.6 (94.6 ± 2.6) | 94.6 (94.5 ± 3.2) | 0.627 | – | – | – |
| Min. O2 saturation | 80.5 (79.9 ± 7.8) | 85.0 (85.5 ± 6.0) | 85.0 (82.9 ± 16.2) | 86.6 (79.7 ± 22.8) | 0.991 | – | – | – |
Data are expressed as median (mean ± standard deviation). The above p values for the pairwise comparisons, using the Wilcoxon signed-rank test, have undergone Bonferroni adjustment
HI hypopnea index, ODI oxygen saturation index
aDefined as the number of times per hour that the oxygen saturation dropped below 4 % of baseline