Comparisons of baseline characteristics and CPAP usage between therapeutic and subtherapeutic CPAP groups who completed the treatment protocol
| Therapeutic CPAP(n = 23) | Subtherapeutic CPAP(n = 23) | p value | |
|---|---|---|---|
| For definition of abbreviations, see footnote to table 1. | |||
| Values are expressed as mean (SE). | |||
| *χ2 test. | |||
| †Fisher’s exact test. | |||
| Patients in the subtherapeutic CPAP group had AutoSet CPAP titration study performed after completion of the 3 month study. | |||
| M/F | 19/4 | 18/5 | 1.000† |
| Age (years) | 50.2 (1.7) | 51.4 (2.1) | 0.666 |
| Neck circumference (cm) | 39.2 (0.5) | 38.2 (0.7) | 0.266 |
| Waist circumference (cm) | 95.2 (2.1) | 93.8 (2.2) | 0.646 |
| BMI (kg/m2) | 27.4 (0.7) | 26.9 (0.8) | 0.670 |
| ESS (0–24) | 10.2 (1.0) | 11.2 (1.1) | 0.522 |
| Smoking status | 0.918* | ||
| Never | 18 | 17 | |
| Quit | 3 | 4 | |
| Current | 2 | 2 | |
| Alcohol consumption | 0.193* | ||
| Never | 13 | 14 | |
| Quit | 3 | 0 | |
| Current | 7 | 9 | |
| Hypertension | 0.139† | ||
| Yes | 15 | 9 | |
| No | 8 | 14 | |
| AHI | 31.3 (3.3) | 29.1 (3.6) | 0.652 |
| Minimum Sao2 (%) | 75.6 (2.8) | 75.1 (3.2) | 0.910 |
| Mean Sao2 (%) | 93.2 (0.8) | 94.3 (0.4) | 0.193 |
| Arousal index | 34.1 (3.8) | 32.0 (3.2) | 0.671 |
| Sao2 <90 (TST %) | 7.1 (3.5) | 12.1 (4.5) | 0.383 |
| Mean 24 hour BP | |||
| Systolic | 125.9 (3.0) | 122.0 (3.0) | 0.870 |
| Diastolic | 82.5 (2.2) | 79.6 (2.2) | 0.377 |
| MAP | 96.8 (2.1) | 93.9 (2.1) | 0.347 |
| Wake time BP | |||
| Systolic | 129.1 (3.0) | 127.7 (3.0) | 0.752 |
| Diastolic | 84.3 (2.2) | 83.6 (2.1) | 0.817 |
| MAP | 98.9 (2.1) | 98.1 (2.1) | 0.870 |
| Sleep time BP | |||
| Systolic | 118.3 (3.3) | 113.7 (3.3) | 0.337 |
| Diastolic | 76.9 (2.5) | 73.6 (2.2) | 0.336 |
| MAP | 91.3 (2.5) | 87.5 (2.5) | 0.682 |
| CPAP usage (hours/night) over 3 months | 5.1 (0.4) | 2.6 (0.4) | 0.000 |
| AutoSet CPAP titration pressure (cm H2O) | 10.7 (0.4) | 9.6 (0.5) | 0.099 |