Table 2

CPAP treatment effects on ECG risk markers for atrial fibrillation and sudden cardiac death

Standard careCPAP
OutcomeNBaseline
mean (SD)
Follow-up
mean (SD)
NBaseline
mean (SD)
Follow-up
mean (SD)
Treatment effect (95% CI)P Value
Heart rate12265.4 (11.2)64.7 (12.6)12865.1 (10.5)64.0 (10.2)−0.4 (−2.4 to 1.7)0.71
P wave max119106.6 (9.9)106.8 (10.7)126108.3 (11.2)108.1 (12.4)0.0 (−2.4 to 2.5)0.98
P wave mean11987.1 (8.0)86.1 (8.2)12687.6 (8.6)87.6 (10.0)0.9 (−0.8 to 2.6)0.32
P wave dispersion11941.9 (12.0)43.4 (12.0)12642.6 (11.8)43.3 (12.8)−0.4 (−3.4 to 2.7)0.82
QTmax118400.3 (30.4)402.4 (33.6)126406.3 (34.6)408.8 (35.1)1.5 (−4.3 to 7.3)0.61
QTmean118382.1 (28.7)384.4 (30.6)126387.5 (31.4)389.8 (30.4)0.9 (−3.9 to 5.7)0.72
QTcmean*118395.1 (20.2)395.3 (21.0)126400.3 (24.6)399.8 (25.6)0.9 (−3.5 to 5.4)0.68
QT dispersion11841.5 (15.4)41.0 (17.1)12644.6 (17.8)43.7 (16.8)1.8 (−2.3 to 5.8)0.39
PQ114155.9 (24.1)154.3 (23.6)125156.3 (26.9)157.5 (26.6)2.4 (−2.1 to 7.0)0.30
TpTe/QT1220.2 (0.0)0.2 (0.0)1280.2 (0.0)0.2 (0.0)0.0 (−0.0 to 0.0)0.89
TpTec*12276.2 (13.5)75.1 (11.4)12876.0 (14.4)75.5 (13.2)0.2 (−2.6 to 2.9)0.92
  • Values are mean (SD). 95% CI of the difference between groups in change from baseline.

  • *Corrected for heart rate.

  • CPAP, continuous positive airway pressure.