Table 3.
Demographic and clinical characteristics of patients who initiated CPAP and primary failures.
| Initiated CPAP N = 229 |
Primary Failures N = 78 |
p | |
|---|---|---|---|
| Age [years] | 57.8 ± 10.2 | 54.2 ± 12.1 | 0.013 |
| BMI [kg/m2] | 33.2 ± 5.2 | 33.2 ± 6.2 | 0.960 |
| Sex—M (%) | 189 (82.5%) | 57 (73.1%) | 0.071 |
| AHI | 38.0, 22.0–58.3 | 28.9, 17.8–51.0 | 0.028 |
| AHI CPAP | 4.0, 2.0–11.0 | 4.0, 1.3–9.0 | 0.511 |
| 90% CPAP pressure [mbar] | 11.4 ± 2.5 | 11.1 ± 2.3 | 0.307 |
| AHI ≥ 15 [N] | 202 (88.2%) | 63 (80.9%) | 0.099 |
| Positional OSA | 109/185 (59%) * | 42/60 (70%) * | 0.167 |
| ESS | 10.0, 7.0–13.0 | 8.0, 5.0–12.0 | 0.085 |
* The total number of cases is lower than for the whole group as some patients slept only in one position and their positional status was not to be assessed. AHI—apnoea/hypopnoea index, BMI—body mass index, CPAP—continuous positive airway pressure, ESS—Epworth Sleepiness Scale score, M—males, N—number, OSA—obstructive sleep apnoea/hypopnoea syndrome. All data are presented as a mean ± SD or median, lower–upper quartile or frequencies.