Table 3 ECG measurements.

From: Deep neural network-estimated electrocardiographic age as a mortality predictor

 

CODE-15% (n = 80,679)

ELSA-Brasil (n = 7,691)

 

± 8 years

>8 years younger

>8 years older

p value

± 8 years

>8 years younger

>8 years older

p value

Heart rate (bpm)

70 (63–78)

70 (62–79)

71 (64–79)

<0.001

66 (61–72)

64 (59–71)

69 (63–75)

<0.001

P duration (ms)

106 (100–114)

108 (100–116)

108 (100–116)

<0.001

108 (102–116)

110 (102–116)

108 (100–116)

0.558

QRS axis

47 (27–65)

45 (25–62)

43 (24–60)

<0.001

44 (21–60)

43 (20–61)

44 (19–61)

0.737

QRS duration (ms)

90 (84–96)

90 (84–96)

92 (84–98)

<0.001

86 (80–92)

86 (82–92)

86 (80–90)

0.068

Average RR interval (ms)

845 (757–942)

845 (750–950)

837 (750–932)

<0.001

–

–

–

–

QTc (ms)

411 (400–424)

413 (401–425)

413 (401–425)

<0.001

416 (405–427)

414 (403–426)

418 (406–429)

<0.001

  1. The table displays the median, and (“under parentesis”) the interquartile range, for the ECG measurements. It considers three groups of patients: those with ECG-age more than 8 years greater than the chronological age (denoted by: “>8 years older”); those with ECG-age within a range of 8 years from their chronological age (denoted by: “±8 years”); and, those with ECG-age more than 8 years smaller than the chronological age (denoted by: “>8 years younger”). Statistical comparison of the medians is made through Kruskal–Wallis two-sided test.
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