Comparison of Auto- and Fixed-Continuous Positive Airway Pressure on Air Leak in Patients with Obstructive Sleep Apnea: Data from a Randomized Controlled Trial
Table 2
Patient characteristics.
Anthropometric data and comorbidities
General population (n = 269)
Fixed-CPAP (n = 130)
Auto-CPAP (n = 139)
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
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.
