P axis

QRS axis

T axis

QTA

Mean ± SD (degrees)

48.54 ± 20.08

37.69 ± 21.10

30.41 ± 19.11

7.28 ± 23.26

Pearson’s regression coefficient (r)

0.032

−0.295

−0.002

−0.266

P value

0.773

0.006

0.984

0.014