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Table 4 Prevalence of borderline 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 %
Right axis deviation 176 1.78% 28 0.88% 204 1.56% < 0.01
Left axis deviation 98 0.99% 9 0.28% 107 0.82% < 0.01
Left atrial enlargement 70 0.71% 22 0.69% 92 0.70% > 0.05
Right atrial enlargement 55 0.56% 16 0.50% 70 0.54% > 0.05
Complete RBBB 18 0.18% 1 0.03% 19 0.15% < 0.05
Any of the above findings 386 3.90% 66 2.07% 452 3.46% < 0.01
  1. Note: *: p value of chi-square test between men and women
  2. RBBB right bundle branch block