Table II.
Results of polysomnographic study and color Doppler imaging parameters.
| Parameter | Controls | Severe OSAHS | P-value |
|---|---|---|---|
| AHI | 4.0±3.0 (3.0 to 6.0) | 37.4±15.4 (32,8 to 42,0) | <0.001a,b |
| Saturated O2 % | 94.5±1.0 (92,2 to 94,8) | 93.8±1.5 (93,3 to 94,2) | 0.02a,b |
| RDI | 29.5±20.8 (22.6 to 36.3) | 150.2±58.1 (132.7 to 167.6) | <0.001a,b |
| RI | 0.7±0.1 (0.7 to 0.7) | 0.7±0.1 (0.7 to 0.7) | 0.13c |
| PSV | 41.4±14.3 (36.7 to 46.1) | 42.2±15.3 (37.6 to 46.8) | 0.63a |
| EDV | 12.4±5.6 (10.1 to 12.9) | 11.5±4.6 (10.7 to 14.1) | 0.63a |
| PVA | 29.0±10.2 (25.7 to 32.4) | 30.7±12.0 (27.0 to 34.3) | 0.50a |
aP-value determined by non-parametric Mann-Whitney U-test.
bIndicates statistically significant values.
cVariable followed a normal distribution according to the Shapiro-Wilk test for normality and P-value was determined using the t-test. Values are expressed as the mean ± standard deviation (95% CI) or n. OSAHS, obstructive sleep apnea-hypopnea syndrome; AHI, apnea-hypopnea index; RDI, respiratory disturbance index; RI, resistivity index; PSV, peak systolic blood velocity; EDV, end diastolic blood velocity; PVA, patient-ventilator asynchrony.