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Table 5 Prevalence of abnormal ECG findings in the male and female marathon runners

From: Prevalence of abnormal and borderline electrocardiogram changes in 13, 079 Chinese amateur marathon runners

  Men (n = 9897) Women (n = 3182) Total (n = 13,079) P*
n % n % n %
T wave inversion 2 0.02% 2 0.06% 4 0.03% > 0.05
ST segment depression 6 0.06% 6 0.19% 12 0.09% < 0.01
Pathologic Q waves 2 0.02%   2 0.02%  
Premature ventricular contraction 4 0.04% 1 0.03% 5 0.04% > 0.05
Atrial fibrillation 1 0.01%   1 0.01%  
Prolonged QT interval 1 0.01%   1 0.01%  
Any of the above findings 15 0.15% 7 0.22% 22 0.17% > 0.05
  1. Note: *: p value of chi-square test between men and women