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Table 5 Repeated Measures - Comparisons of serial parameters between CPAP and CT at baseline, 6 months and 12 months

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 = 12)    CT (n = 12)   P-value
  Baseline 6 m 12 m Baseline 6 m 12 m  
Neck circumference (cm) 40.0 (1.1) 39.2 (0.9) 39.4 (1.0) 37.6 (1.0) 37.4 (1.0) 37.5 (1.1) 0.516
Waist circumference (cm) 96.3 (3.2) 94.3 (3.3) 94.6 (3.5) 91.9 (2.9) 88.7 (3.6) 91.1 (3.5) 0.527
Hip circumference (cm) 101.7 (2.2) 102.6 (2.5) 104.2 (2.3) 97.5 (2.1) 98.8 (2.3) 100.4 (2.6) 0.967
Body mass index (kg/m²) 27.4 (1.1) 27.6 (1.1) 27.4 (1.1) 25.9 (1.1) 25.9 (1.1) 26.0 (1.2) 0.723
Systolic BP (mmHg) 139.9 (3.6) 118.0 (5.0) 121.7 (4.7) 128.9 (5.7) 124.8 (4.7) 126.8 (6.8) 0.108
Diastolic BP (mmHg) 81.7 (2.7) 76.9 (3.8) 80.0 (3.4) 75.2 (2.9) 82.4 (3.9) 81.5 (5.3) 0.219
ESS (0-24) 12.7 (1.0) 7.3 (1.3) 6.4 (1.2) 11.5 (1.3) 8.7 (1.4) 8.6 (1.6) 0.145
CPAP usage (hrs/night) N/A 4.5 (0.7) 4.7 (0.7) N/A N/A N/A N/A
Mean carotid IMT (micron) 721.7 (40) 690.8 (40) 659.2 (30) 660.0 (20) 684.6 (10) 690.0 (20) 0.006
  1. Values are expressed as mean (SE)
  2. The p-values of BP trends from baseline to 12 months within the CPAP group are as follows: systolic BP, p < 0.001; diastolic BP, p = 0.517