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Table 2 R-wave peak time at lead II at different subgroups

From: R-wave peak time at lead II in Chinese healthy adults

Subgroup (age)

R-wave peak time at lead II (ms) male

R-wave peak time at lead II (ms) female

P value

21 ~ 30

28.98 ± 4.87

30.03 ± 3.54c

0.000

31 ~ 40

29.67 ± 4.60

30.75 ± 3.40b c

0.000

41 ~ 50

30.09 ± 5.08

29.35 ± 4.62

0.181

51 ~ 60

29.95 ± 4.91

29.54 ± 4.95

0.502

61 ~ 70

30.41 ± 4.80a

29.65 ± 5.16

0.453

71 ~ 80

29.26 ± 5.63

28.95 ± 4.64c

0.005

  1. aCompared with group age 21 ~ 30 in the male group, bcompared with group age 41 ~ 80 in the female group, ccompared with corresponding group in the male