Table 2.

Prevalence of ECG abnormalities at baseline (N=4518)^*

MAJOR ABNORMALITIES **	349 (7.7%)
Ventricular conduction defect	58 (1.3%)
Major Q/QS waves abnormalities	80 (1.8%)
Minor Q/QS with ST/T abnormalities	13 (0.3%)
Major isolated ST/T abnormalities	211 (4.7%)
Left ventricular hypertrophy	56 (1.2%)
Atrial fibrillation/flutter	3 (0.1%)
Major AV conduction abnormalities	4 (0.1%)
Major QT prolongation index (QTI ≥ 116%)	14 (0.3%)
MINOR ABNORMALITIES **	2194 (48.6%)
Minor isolated Q/QS	194 (4.3%)
Minor isolated ST/T	516 (11.4%)
High R-waves	570 (12.6%)
ST elevation	399 (8.8%)
Incomplete bundle branch block (BBB)	785 (17.4%)
Incomplete right BBB	162 (3.6%)
Incomplete left BBB	623 (13.8%)
Minor QT prolongation index (QTI ≥ 112%)	35 (0.8%)
Short PR interval	92 (2.0%)
Left axis deviation	132 (2.9%)
Right axis deviation	2 (0.0%)
Frequent ventricular premature beats (VPBs)	29 (0.6%)
Other minor arrhythmias	313 (6.9%)
ANY MAJOR OR MINOR ABNORMALITY **	2325 (51.5%)

^*Values expressed as N (%).

^**The sum of individual ECG abnormalities under each category of major, minor or major/minor ECG abnormalities is larger than the total number of major, minor and major/minor abnormalities respectively. This is because some patients have more than one abnormality (overlap). However, the reported “over all” minor, major or minor/major abnormalities represent the proportion of participants with at least one ECG abnormality (with no overlap).