Table 1.
Baseline characteristics of the patients.
| All | Non-OSA (AHI < 15) | OSA (AHI ≥ 15) | p-value | |
|---|---|---|---|---|
| N = 230 | N = 70 | N = 160 | ||
| Demographic and clinical variables | ||||
| Age (years) -median [IQR]- | 49.0 [44.0;55.0] | 47.0 [40.0;52.0] | 51.0 [45.0;55.0] | 0.002 |
| Sex (men), n (%) | 182 (79.1%) | 48 (68.6%) | 134 (83.8%) | 0.015 |
| BMI (kg/m2) -median [IQR]- | 30.9 [26.5;34.7] | 27.5 [25.4;31.9] | 31.7 [28.1;35.2] | <0.001 |
| Systolic blood pressure (mmHg) -median [IQR]- | 134 [123;146] | 127 [116;137] | 136 [127;148] | <0.001 |
| Diastolic blood pressure (mmHg) -median [IQR]- | 86.0 [79.5;94.5] | 81.8 [75.2;87.8] | 88.5 [82.5;95.0] | <0.001 |
| Smoking status: -n(%)- | 0.564 | |||
| Non-smoker | 81 (35.5%) | 28 (40.0%) | 53 (33.5%) | |
| Former smoker | 79 (34.6%) | 24 (34.3%) | 55 (34.8%) | |
| Smoker | 68 (29.8%) | 18 (25.7%) | 50 (31.6%) | |
| Respiratory parameters | ||||
| AHI (events/h) -median [IQR]- | 29.5 [12.1;51.0] | 8.44 [5.00;11.4] | 43.8 [27.4;63.9] | <0.001 |
| TSat90 (%) -median [IQR]- | 2.40 [0.21;12.7] | 0.05 [0.00;0.58] | 5.15 [2.00;20.6] | <0.001 |
| Arousal index (events/h) -median [IQR]- | 33.8 [21.1;53.6] | 18.9 [13.7;25.9] | 43.3 [32.1;60.7] | <0.001 |
| Minimum SaO2 (%) -median [IQR]- | 82.0 [73.0;87.0] | 89.0 [86.0;91.0] | 79.0 [71.0;83.0] | <0.001 |
| Mean SaO2 (%) -median [IQR]- | 93.0 [91.0;94.0] | 94.0 [93.0;95.0] | 93.0 [91.0;94.0] | <0.001 |
| ESS (0–24) -median [IQR]- | 10.0 [7.00;13.0] | 10.0 [7.00;14.0] | 10.0 [7.00;13.0] | 0.469 |
Abbreviations: BMI = Body Mass Index; AHI = Apnea-Hypoapnea Index; TSat90 = Night Time with Oxygen Saturation Less Than 90%; ESS = Epworth Sleepiness Scale.