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Table 3 ECG patterns among athletes and controls

From: Electrocardiographic pattern of apparently healthy African adolescent athletes in Nigeria

ECG variables Athletes
Mean ± SD
Controls
Mean ± SD
Cohen’s d t test P value
Heart rate (beats/min) 80.16 ± 14.021 84.12 ± 14.100 0.282 −2.668 0.008
PR Interval (msecs) 158.17 ± 34.68 148.72 ± 25.33 0.311 2.951 0.003
QTc interval (msecs) 387.33 ± 27.69 387.60 ± 38.79 0.008 −0.075 0.940
T wave amplitude V5 (mm) 4.52 ± 2.21 4.09 ± 1.55 0.225 2.128 0.034
T wave amplitude V6 (mm) 3.44 ± 1.63 3.22 ± 1.39 0.145 1.374 0.170
P wave amplitude (mm) 1.60 ± 0.57 1.53 ± .490 0.132 1.197 0.232
P wave duration (mm) 80.39 ± 8.99 79.78 ± 7.32 0.074 0.707 0.480
R wave in V1 (mm) 4.40 ± 2.64 4.59 ± 2.38 0.075 −0.722 0.471
S wave in V1 (mm) 13.11 ± 6.09 13.30 ± 5.83 0.032 −0.301 0.764
R wave in V2 (mm) 9.19 ± 5.10 8.89 ± 3.94 0.065 0.613 0.541
S wave in V2 (mm) 16.83 ± 6.91 16.25 ± 6.35 0.087 0.834 0.405
R wave in V5 (mm) 19.16 ± 7.56 17.81 ± 5.70 0.201 1.906 0.058
S wave in V5 (mm) 2.46 ± 2.87 1.96 ± 2.38 0.189 1.791 0.074
R wave in V6 (mm) 14.77 ± 5.73 13.4167 ± 4.53 0.261 2.485 0.013
S wave in V6 (mm) 0.91 ± 1.16 0.78 ± 1.23 0.108 1.101 0.272
QRS duration (msecs) 81.28 ± 9.43 79.53 ± 8.38 0.196 1.867 0.063
  1. msecs Milliseconds, mm Millimeters