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Table 2 Prevalences of arrhythmias in men, women and all participants

From: Prevalences and associated factors of electrocardiographic abnormalities in Chinese adults: a cross-sectional study

ECG abnormalities All participants, No. (percentage) Men (n = 13,983) Women (n = 20,982) P value# (men vs women)
20-44y 45-59y ≥60y All ages 20-44y 45-59y ≥60y All ages
Major arrhythmias 550 (1.70%) 1.30% 2.37% 5.56%*** 2.37% 0.58% 1.06% 2.38%*** 1.04% < 0.001
 Atrial fibrillation or flutter 77 (0.28%) 0.14% 0.23% 1.20%** 0.35% 0.08% 0.05% 0.80%* 0.20% 0.130
 Complete LBBB 28 (0.12%) 0.06% 0.20% 0.61% 0.20% 0.01% 0.03% 0.15%* 0.05% 0.037
 Complete RBBB 289 (0.85%) 0.51% 1.21% 2.97%*** 1.16% 0.35% 0.59% 1.10%** 0.55% 0.001
 Nonspecific IVCD 59 (0.20%) 0.29% 0.43% 0.59% 0.38% 0.00% 0.06% 0.03% 0.02% < 0.001
 Mobitz Type II or III AV conduction defects 16 (0.04%) 0.01% 0.07% 0.04% 0.03% 0.00% 0.17% 0.02% 0.05% 0.536
 Supraventricular or ventricular rhythm/tachycardia 28 (0.09%) 0.14% 0.14% 0.12% 0.14% 0.01% 0.10% 0.07% 0.05% 0.084
 WPW 44 (0.09%) 0.14% 0.04% 0.02%** 0.09% 0.12% 0.04% 0.05% 0.09% 0.926
 Artificial pacemaker 9 (0.03%) 0.01% 0.04% 0.00% 0.02% 0.00% 0.01% 0.16% 0.03% 0.117
Minor arrhythmias 3046 (9.92%) 11.05% 10.82% 14.26%* 11.58% 6.58% 7.85% 14.17%*** 8.29% < 0.001
 Sinus bradycardia 703 (2.81%) 3.99% 4.29% 3.22% 3.94% 1.62% 2.03% 1.39% 1.70% < 0.001
 Sinus tachycardia 540 (1.68%) 0.94% 1.07% 2.06%* 1.18% 1.78% 1.38% 4.52% 2.14% 0.004
 Atrial or junctional or ventricular premature beats 544 (1.57%) 0.91% 1.04% 4.33%*** 1.58% 0.87% 1.73%** 3.41%*** 1.57% 0.945
 Incomplete RBBB 285 (0.97%) 1.53% 1.47% 0.94% 1.40% 0.34% 0.85%* 0.67% 0.55% < 0.001
 Mobitz Type I AV conduction defect 141 (0.47%) 0.43% 0.85%* 0.79% 0.62% 0.15% 0.17% 1.08% 0.32% 0.045
 Short PR interval 241 (0.70%) 0.84% 0.26%* 0.13%* 0.54% 1.02% 0.89% 0.34%*** 0.86% 0.084
 Other minor arrhythmias 592 (1.73%) 2.40% 1.84% 2.80% 2.31% 0.81% 0.79% 2.75% 1.15% < 0.001
  1. The percentages shown above were compared by Chi-square or Fisher’s test. *, * and *** indicated the p values comparing the percentages of ECG findings in the middle/older age group with those in the young age group (* p < 0.05, ** p < 0.01, *** p < 0.001). # The p values revealed the differences comparing the percentages of ECG findings between men and women. The underlined p values indicated the significant differences (p < 0.05). LBBB left bundle branch block, RBBB right bundle branch block, IVCD intravascular conducting delay, AV atrial-ventricular, WPW Wolff-Parkinson-White