Table 4.
Demographic and clinical characteristic of patients still on treatment, secondary failures, and all failures.
| Still on CPAP N = 165 |
Secondary Failures N = 64 |
p | All Failures N = 142 |
p | |
|---|---|---|---|---|---|
| Age [years] | 57.6 ± 10.0 | 58.2 ± 9.1 | 0.68 | 56.0 ± 11.0 | 0.208 |
| BMI [kg/m2] | 33.2 ± 5.6 | 33.1 ± 4.1 | 0.87 | 32.7 ± 5.3 | 0.932 |
| Sex—M (%) | 136 (82.4%) | 53 (82.5%) | 0.94 | 110 (77.5%) | 0.346 |
| AHI | 40.6, 24.6–60.9 | 30.7, 16.5–52.1 | 0.017 | 30.4, 17.0–52.0 | 0.001 |
| AHI CPAP | 4.0, 2.0–11.0 | 4.0, 1.5–11.0 | 0.804 | 4.0, 1.3–10.0 | 0.826 |
| 90% CPAP pressure [mbar] | 11.0, 10.0–13.0 | 11.0, 10.0–12.0 | 0.214 | 11.0, 10.0–12.0 | 0.079 |
| AHI ≥ 15 | 151 (91.5%) | 51 (79.7%) | 0.024 | 114 (80.3%) | 0.007 |
| Positional OSA | 74/129 (57%) * | 35/56 (63%) * | 0.624 | 77/116 (66%) * | 0.188 |
| ESS | 10.0, 7.0–13.0 | 9.0, 6.0–13.0 | 0.706 | 9.0, 6.0–12.5 | 0.163 |
* The total number of cases is lower than for the whole group because some patients slept only in one position and their positional status was not possible to assess. AHI—apnoea/hypopnoea index, BMI—body mass index, CPAP—continuous positive airway pressure, ESS—Epworth Sleepiness Scale score, OSA—obstructive sleep apnea/hypopnea syndrome, M—males, N—number. All data are presented as a mean ± SD or median, lower–upper quartile or frequencies.