. Author manuscript; available in PMC: 2011 Jul 1.

Published in final edited form as: Heart Rhythm. 2010 Mar 4;7(7):898–903. doi: 10.1016/j.hrthm.2010.03.002

Table 1.

Clinical characteristics and electrocardiographic repolarization measures (n=5,890)

Men (%)	45.2
Age (years)	52.1±14.3
Current smoking (%)	21.9
Body mass index (kg/m²)	26.9±4.7
Heart rate (beats/minute)	63.3±10.7
Systolic blood pressure (mmHg)	134.2±21.0
Diastolic blood pressure (mmHg)	81.9±11.0
Hypertension (%)	46.8
Coronary heart disease (%)	6.6
Previous myocardial infarction (%)	2.3
Heart failure (%)	1.1
Diabetes mellitus (%)	5.6
ECG left ventricular hypertrophy (%)	17.8
TPE interval^* (ms)	83.4±12.5
PCA ratio (%)	15.5±8.4
TMD (°)	14.6±13.4
TCRT (unitless)	0.36±0.52
TWR (technical units)	16,810±22,749

Maximum precordial TPE interval. Values are mean±SD for continuous variables and percentages for categoric variables. PCA=principal component analysis, TCRT=total cosine R-to-T, TMD=T-wave morphology dispersion, TPE=T-wave peak to T-wave end interval, TWR=T-wave residuum.