Table 2.
Patient characteristics.
| Anthropometric data and comorbidities | General population (n = 269) | Fixed-CPAP (n = 130) | Auto-CPAP (n = 139) | p value |
|---|---|---|---|---|
| Age (years) | 58 (50; 64) | 58 (51; 65) | 57 (49; 64) | 0.51 |
| Sex, female, No. (%) | 76 (28.3) | 36 (27.7) | 40 (28.8) | 0.84 |
| BMI (kg/m2) | 30.1 (27.0; 34.8) | 31.2 (27.5; 35.1) | 29.6 (26.6; 34.5) | 0.11 |
| Current smoker, No. (%) | 51 (19.0) | 25 (19.2) | 26 (18.7) | 0.91 |
| Hypertension, No. (%) | 180 (66.9) | 95 (73.1) | 85 (61.2) | 0.04 |
| Diabetes, No. (%) | 49 (18.2) | 25 (19.2) | 24 (17.3) | 0.68 |
|
| ||||
| Treatment parameters | ||||
| Residual AHI (events/h) | 3.7 (2.2; 6.9) | 3.8 (2.2; 8.0) | 3.6 (2.1; 6.3) | 0.31 |
| CPAP use (hours) | 5.5 (3.9; 6.7) | 5.7 (3.9; 6.8) | 5.4 (3.8; 6.7) | 0.41 |
| CPAP level, (cmH2O) | 8.5 (7; 10) | 9.0 (8; 11) | 7.5 (6.5; 9.4) | <0.0001 |
| Oronasal maska, No. (%) | 99 (37.9) | 52 (41.9) | 47 (34.3) | 0.20 |
| Chin strap, No. (%)b | 5 (1.9) | 0 (0) | 5 (3.6) | 0.06 |
| Heated humidifier, No. (%)c | 130 (48.7) | 64 (50) | 66 (47.5) | 0.68 |
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| ||||
| Sleep apnea severity at diagnosis | ||||
| AHI, (events/h) | 39.4 (29.6; 56.9) | 39.4 (29.0; 59.1) | 39.8 (30.0; 56.6) | 0.62 |
| Epworth sleepiness scale, 1–24 | 9 (6; 13) | 10 (6; 15) | 9 (6; 13) | 0.07 |
BMI: body mass index, AHI: apnea-hypopnea index, and CPAP: continuous positive airway pressure; data are expressed as % or median (IQR). aMask type from 8 patients was missing; bchin strap use from 6 patients was missing; cheated humidifier use from 5 patients was missing. Data are reported as medians and quartiles or numbers and percentages, as appropriate.