Table 2.
Polysomnographic and cardiovascular variables of all subjects.
| All subjects (n=471)
|
P | |||
|---|---|---|---|---|
| Normal (n=226) | Mild-to-moderate (n=127) | Severe (n=118) | ||
| PSQI | 6.49 (0.27) | 7.18 (0.34) | 7.55 (0.39) | 0.077 |
| ESS | 6.71 (0.32)a | 7.31 (0.40) | 8.16 (0.46)a | 0.048* |
| AHI (events/h) | 6.79 (0.51)a | 21.62 (0.65)a | 46.56 (0.71)a | <0.001* |
| Lowest O2 (%) | 87.78 (0.39)a | 84.24 (0.49)a | 78.59 (0.53)a | <0.001* |
| Desat. < 90% (%) | 1.20 (0.52)a | 1.58 (0.66) | 8.83 (0.72)a | <0.001* |
| ODI | 5.02 (0.66)a | 14.83 (0.84)a | 36.01 (0.91)a | <0.001* |
| cSBP (mmHg) | 115.4 (1.05) | 118.6 (1.32) | 118.5 (1.44) | 0.118 |
| cDBP (mmHg) | 74.6 (0.63) | 75.9 (0.80) | 76.8 (0.87) | 0.159 |
| baPWV (cm/s) | 1632.9 (19.6) | 1633.9 (248.0) | 1675.3 (282.7) | 0.202 |
| CAVI | 5.64 (0.14) | 5.79 (0.18) | 6.25 (0.20) | 0.062 |
| hs-CRP (mg/L) | 1.04 (0.11) | 1.31 (0.14) | 1.39 (0.15) | 0.154 |
Data are presented as means (s.e.m.).
*
P<0.05, gender- and BMI-adjusted ANCOVA;
a
P<0.05 by pairwise comparison between the means with same superscript with Boferroni’s correction
PSQI, Pittsburgh sleep quality index; ESS, Epworth sleepiness scale; AHI, apnea-hypopnea index; Lowest O2, lowest O2 saturation during sleep study; Desat. < 90%, percentage of sleep with desaturation of oxygen below 90%; ODI, oxygen desaturation index; cSBP, central systolic blood pressure; cDBP, central diastolic blood pressure; baPWV, brachial-ankle pulse wave velocity; CAVI, cardio-ankle vascular index; hs-CRP, high-sensitivity C-reactive protein