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Table 2 Comparison of baseline parameters between patients on CPAP and Conservative treatment (CT)

From: A prospective cohort study of the long-term effects of CPAP on carotid artery intima-media thickness in Obstructive sleep apnea syndrome

  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
  1. Data expressed as mean (SE)