Table 2.
Comparison of baseline parameters between patients on CPAP and Conservative treatment (CT)
| CPAP (n = 28) | CT (n = 22) | P value | |
|---|---|---|---|
| Male/Female | 25/3 | 16/6 | 0.157 |
| Age (yrs) | 48.8 (1.8) | 50.5 (2.0) | 0.526 |
| Body mass index (kg/m²) | 28.2 (0.7) | 28.0 (1.2) | 0.875 |
| Neck circumference (cm) | 40.5 (0.7) | 38.5 (0.8) | 0.060 |
| Waist circumference (cm) | 97.9 (1.9) | 95.3 (2.8) | 0.437 |
| Hip circumference (cm) | 102.2 (1.4) | 100.8 (2.3) | 0.589 |
| Cholesterol (mmol/l) | 5.8 (0.4) | 5.2 (0.2) | 0.180 |
| HDL Cholesterol (mmol/l) | 1.3 (0.1) | 1.3 (0.1) | 0.923 |
| LDL Cholesterol (mmol/l) | 3.3 (0.3) | 3.0 (0.2) | 0.449 |
| Triglycerides (mmol/l) | 3.3 (1.6) | 2.2 (0.5) | 0.477 |
| Fasting plasma glucose (mmol/l) | 5.2 (0.2) | 5.5 (0.2) | 0.223 |
| Smoking status | |||
| Non smoker | 20 | 13 | 0.386 |
| Smoker | 8 | 9 | |
| Alcoholic consumption | |||
| Non drinker | 14 | 9 | 0.577 |
| Drinker | 14 | 13 | |
| ESS (0-24) | 13.4 (0.9) | 12.7 (1.0) | 0.603 |
| Congestive Heart Failure | |||
| Yes | 0 | 3 | 0.079 |
| No | 28 | 19 | |
| Diabetes Mellitus | |||
| Yes | 3 | 3 | 1.000 |
| No | 25 | 19 | |
| Hypertension | |||
| Yes | 14 | 9 | 0.577 |
| No | 14 | 13 | |
| On anti-hypertensive drugs | |||
| Yes | 14 | 8 | 0.166 |
| No | 14 | 14 | |
| On diabetic drugs | |||
| Yes | 2 | 1 | 1.000 |
| No | 26 | 21 | |
| Carotid plaque in baseline study | |||
| Yes | 7 | 5 | 1.000 |
| No | 21 | 17 | |
| Systolic blood pressure (mmHg) | 140.8 (3.2) | 139.7 (6.1) | 0.873 |
| Diastolic blood pressure (mmHg) | 81.7 (2.1) | 79.1 (3.4) | 0.497 |
| AHI (events per hr) | 39.0 (3.6) | 36.1 (5.1) | 0.633 |
| REM-AHI (events per hr) | 39.1 (6.5) | 32.5 (5.7) | 0.459 |
| Non-REM-AHI (events per hr) | 39.0 (3.7) | 36.2 (5.3) | 0.662 |
| Minimum SaO2 (%) | 74.7 (2.1) | 74.8 (4.2) | 0.983 |
| Mean SaO2 (%) | 93.7 (0.4) | 92.1 (1.2) | 0.209 |
| Arousal index (per hr of sleep) | 31.1 (2.4) | 27.1 (3.4) | 0.331 |
| Percentage of sleep time with SaO2<90% | 11.1 (2.7) | 17.0 (6.3) | 0.399 |
| Snoring/TST (%) | 11.8 (4.6) | 18.5 (7.7) | 0.435 |
| Sleep efficiency (%) | 82.5 (2.0) | 84.5 (2.3) | 0.513 |
| Mean carotid IMT (micron) | 757.5 (30) | 760.0 (30) | 0.952 |
Data expressed as mean (SE)