Table 3.
Changes in PSG parameters from diagnostic to CPAP studies
| PSG data | Total cohort (n = 149) |
Females (n = 68) |
Males (n = 81) |
P-value |
|---|---|---|---|---|
| Sleep latency | 0 (−20.5, 11) | 2 (−22.95, 16) | −1 (−18.5, 7) | 0.285 |
| REM latency | −15 (−82.5, 31) | −23.75 (−87.5, 17.5) | −2 (−53, 48) | 0.048* |
| Total sleep time | −36.7 (−111.4, 22.9) | −33 (−111.25, 17.75) | −42 (−121.3, 25.25) | 0.905 |
| WASO | −4 (−41, 48) | −7.6 (−43.95, 47.75) | −4 (−34.1, 48) | 0.706 |
| Sleep efficiency | −0.9 (−10.4, 7.65) | −0.9 (−9.35, 7.9) | −0.95 (−10.5, 7.2) | 0.969 |
| N1 stage (%) | −2.5 (−9.05, 1.9) | −2.55 (−7.9, 2.1) | −2.5 (−12.2, 1.8) | 0.349 |
| N2 stage (%) | −8.65 (−19.9, 0.25) | −10.05 (−20.8, −0.75) | −5.2 (−19.55, 2.22) | 0.270 |
| N3 stage (%) | 34.877.65 (0.65, 15.1) | 10.25 (1.65, 17.85) | 6.55 (0, 13.75) | 0.110 |
| REM (%) | 5.3 (−3, 14.75) | 3 (−3.6, 11.85) | 6.9 (−2.7, 16.85) | 0.137 |
| RAI | −10.65 (−29.75, −4) | −9.5 (−24.8, −3.9) | −13.55 (−34, −4.2) | 0.390 |
| SAI | 3.2 (0.6, 6.8) | 3 (−0.3, 7.2) | 3.45 (1.3, 6.55) | 0.208 |
| TAI | −10.2 (−27.8, −1.4) | −9.2 (−26.45, −2.15) | −10.45 (−31.8, −0.35) | 0.971 |
| Total AHI | −32.5 (−52.6, −14.9) | −26.05 (−55.05, −12.7) | −38.6 (−52.4, −18.5) | 0.270 |
| NREM AHI | −28.7 (−49.3, −11.8) | −19.45 (−49.85, −10.1) | −33.6 (−48.5, −15.2) | 0.308 |
| REM AHI | −34.9 (−63, −15.5) | −41.5 (−68.45, −22.65) | −28.3 (−56.7, −10.1) | 0.029* |
| SpO2 (wake) | 1 (0, 2) | 1 (0, 2) | 1 (0, 2) | 0.145 |
| SpO2 (NREM) | 2 (1, 3) | 2 (1, 3) | 2 (1, 3) | 0.245 |
| SpO2 (REM) | 3 (1, 6) | 3 (1, 6) | 3 (1, 6) | 0.948 |
| SpO2 (Total) | 2 (0.5, 3) | 2 (0, 3) | 2 (1, 3) | 0.473 |
| SpO2 (Nadir) | 8 (2, 13.5) | 8.5 (1.5, 15) | 8 (2.5, 13) | 0.888 |
P-value obtained via Kruskal–Wallis’s rank sum test. Data displayed as median (IQR).