Comparisons of baseline parameters between therapeutic and subtherapeutic CPAP groups
| Therapeutic CPAP(n = 28) | Subtherapeutic CPAP(n = 28) | p value | |
|---|---|---|---|
| For definition of abbreviations, see footnote to table 1. | |||
| Values are expressed as mean (SE). | |||
| *χ2 test. | |||
| †Fisher’s exact test. | |||
| M/F | 22/6 | 21/7 | 1.000† |
| Age (years) | 50.3 (1.6) | 51.2 (1.8) | 0.718 |
| Neck circumference (cm) | 39.1 (0.6) | 37.9 (0.6) | 0.163 |
| Waist circumference (cm) | 95.2 (1.8) | 92.9 (2.1) | 0.406 |
| Hip circumference (cm) | 100.7 (2.0) | 102.0 (1.7) | 0.623 |
| BMI (kg/m2) | 27.5 (0.6) | 26.9 (0.7) | 0.546 |
| ESS score | 10.7 (1.0) | 11.6 (1.0) | 0.543 |
| Smoking status | 0.894* | ||
| Never | 21 | 22 | |
| Quit | 4 | 4 | |
| Current | 3 | 2 | |
| Alcohol consumption | 0.543* | ||
| Never | 17 | 17 | |
| Quit | 3 | 1 | |
| Current | 8 | 10 | |
| Hypertension | 0.181† | ||
| Yes | 17 | 11 | |
| No | 11 | 17 | |
| AHI (events/hour) | 32.9 (3.2) | 29.5 (3.1) | 0.455 |
| Minimum Sao2 (%) | 73.4 (2.5) | 75.8 (2.8) | 0.531 |
| Mean Sao2 (%) | 93.0 (0.6) | 94.4 (0.4) | 0.057 |
| Arousal index | 33.2 (3.6) | 30.3 (3.1) | 0.550 |
| Sao2 <90 (TST %) | 5.6 (2.8) | 11.3 (3.8) | 0.231 |
| Mean 24 hour BP (mm Hg) | |||
| Systolic | 125.4 (2.6) | 122.0 (2.7) | 0.359 |
| Diastolic | 81.8 (1.9) | 80.0 (1.7) | 0.483 |
| MAP | 96.2 (1.8) | 94.1 (2.0) | 0.417 |
| Wake time BP | |||
| Systolic | 128.6 (2.6) | 127.2 (2.7) | 0.689 |
| Diastolic | 83.7 (1.9) | 83.7 (1.7) | 0.966 |
| MAP | 98.3 (1.8) | 97.9 (1.9) | 0.857 |
| Sleep time BP | |||
| Systolic | 117.7 (2.9) | 113.9 (3.0) | 0.314 |
| Diastolic | 75.8 (2.1) | 74.1 (2.0) | 0.478 |
| MAP | 90.6 (2.1) | 87.8 (2.3) | 0.317 |