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Table 2 Univariate regression analysis of predictors for QTc in all participants

From: High prevalence of altered cardiac repolarization in patients with COPD

  β 95% confidence interval p-value
Cardiovascular risk    
Age, y 0.30 0.15/0.45 <0.001*
Male/Female -0.08 -0.23/0.08 0.317
BMI, kg/m2 0.13 -0.02/0.28 0.104
Current smoker, N (%) -0.01 -0.16/0.15 0.934
Pack years of smoking, N 0.28 0.13/0.44 <0.001*
Pocock risk score, % 0.17 -0.00/0.35 0.054
Respiratory variables    
FEV1% pred. -0.30 -0.48/-0.12 0.001*
FVC% pred. -0.32 -0.50/-0.15 <0.001*
SaO2, % -0.34 -0.51/-0.17 <0.001*
Medication    
Medication affecting QT, N (%) 0.13 -0.03/0.28 0.108
Beta blocker, N (%) 0.05 -0.11/0.20 0.558
Combined inhaled long-acting β-adrenergic and steroid, N (%) 0.28 0.13/0.43 <0.001*
Statins, N (%) 0.23 0.07/0.38 0.004*
  1. *p < 0.05; QTc: QT interval corrected for heart rate; BMI: body mass index; FEV1: forced expiration in one second; FVC: forced vital capacity; SaO2: arterial oxygen saturation.