Table 4.
Association of ESS with PSG parameters
| Covariates | ESS ≤ 10 {n = 146} | ESS > 10 {n = 90} | P-value | ||
|---|---|---|---|---|---|
|
|
|
||||
| Mean (SD) | Median (IQR) | Mean (SD) | Median (IQR) | ||
| BMI (kg/m2) | 33.3 (7.9) | 32.1 (8.1) | 36.2 (8.6) | 34.6 (11.7) | 0.008* |
| Age (years) | 53.0 (14.3) | 54.0 (22.0) | 52.6 (13.3) | 52.0 (16.0) | 0.80* |
| PSQI | 8.2 (4.4) | 7.0 (7.0) | 9.2 (3.8) | 9.0 (6.0) | 0.05* |
| SE (%) | 68.7 (21.2) | 75.0 (21.3) | 67.7 (21.0) | 72.4 (32.5) | 0.72* |
| AHI | 27.1 (33.1) | 13.5 (25.7) | 38.1 (40.7) | 20.9 (53.0) | 0.05δ |
| AI | 18.2 (13.4) | 15.0 (16.0) | 15.1 (9.9) | 13.0 (14.0) | 0.11δ |
| APLM/hour | 0.6 (1.3) | 0 (0.6) | 0.3 (1.2) | 0 (0) | 0.004δ |
| RERA/hour | 2.1 (3.6) | 0.6 (2.5) | 2.2 (4.1) | 0.7 (2.3) | 0.68δ |
Notes:
*
P-value based on t-test;
δ
P-value based on Wilcoxon test.
Abbreviations: AHI, Apnea–Hypopnea Index; AI, Arousal Index; APLM, Arousing Periodic Limb Movements; BMI, Body Mass Index kg/m2; ESS, Epworth Sleepiness Scale; IQR, interquartile range; PSQI, Pittsburg Sleep Quality Index; RERA, respiratory effort-related arousals; PSG, polysomnography; SD, standard deviation; SE, sleep efficiency.