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Table 2 Quantitative characterization of the 13 difference features distributions in the HFDB and the IDB

From: Serial electrocardiography to detect newly emerging or aggravating cardiac pathology: a deep-learning approach

 

HFDB

IDB

Total

Controls

Cases

Total

Controls

Cases

(N = 129)

(N = 81)

(N = 48)

(N = 482)

(N = 398)

(N = 84)

\(\Delta QRSdur\) (ms)

0.0

[− 4.0;8.0]

0.0

[− 4.0;4.5]

4.0*

[− 4.0;17.0]

0.0

[− 2.0;16.0]

0.0

[− 4.0;4.0]

8.0**

[0.0;17.0]

\(\Delta QT\) (ms)

1.0

[− 13.3;20.3]

− 1.0

[− 13.0;− 13.8]

7.5

[− 15.5;34.0]

2.0

[− 14.0;16.0]

2.5

[− 14.0;15.0]

0.0

[− 17.0;19.0]

\(\Delta |{\overline{QRSmax}}|\) (μV)

− 26.0

[− 149.0;86.6]

− 34.2

[− 144.9;57.3]

− 11.9

[− 196.4;175.7]

− 21.1

[− 131.3;79.8]

− 12.1

[− 127.9;96.1]

− 38.9*

[− 144.0;16.0]

\(\Delta |{\overline{Tmax}}|\) (μV)

− 15.5

[− 65.7;39.7]

− 4.6

[− 42.0;40.0]

− 48.2*

[− 133.9;33.2]

− 9.5

[− 68.1;53.5]

− 11.4

[− 68.0;45.4]

3.0

[− 70.4;87.8]

\(\Delta |{\overline{QRSintg}}|\) (mV·ms)

0.4

[− 3.9;5.3]

− 0.76

[− 3.9;3.0]

3.5*

[− 2.7;10.8]

− 0.0

[− 2.9;3.4]

− 0.3

[− 3.3;2.8]

1.7***

[− 1.5;9.1]

\(\Delta |{\overline{Tintg}}|\) (mV·ms)

− 2.7

[− 13.3;7.1]

0.0

[− 10.6;7.1]

− 7.4

[− 19.2;8.1]

− 0.6

[− 10.6;8.9]

− 0.9

[− 10.7;7.5]

6.6**

[− 10.4;30.1]

\(\Delta QRScmplx\) (%)

0.3

[− 1.2;1.6]

− 0.0

[− 1.2;1.0]

1.3**

[− 0.7;3.4]

0.1

[− 0.8;1.1]

0.0

[− 1.0;0.9]

0.6***

[− 0.3;2.8]

\(\Delta Tcmplx\) (%)

0.4

[− 1.0;1.5]

0.0

[− 1.2;1.0]

1.6***

[0.2;4.1]

0.1

[− 1.2;1.4]

0.0

[− 1.1;1.1]

0.4

[− 3.6;4.4]

\(|\overline{\Delta VG}|\) (mV·ms)

27.5

[16.1;41.8]

25.0

[14.6;36.2]

32.7*

[18.1;50.0]

50.0

[37.5;65.2]

49.6

[38.0;63.0]

56.0

[33.4;86.6]

\(|\Delta SA|\) (°)

13.3

[5.3;27.0]

9.1

[3.6;14.8]

31.7***

[14.9;56.0]

9.3

[4.0;17.2]

8.3

[3.7;15.1]

15.1***

[7.1;45.5]

\(\Delta HR\) (bpm)

0.4

[− 5.2;6.1]

− 0.7

[− 5.3;4.6]

2.9*

[− 2.2;10.0]

1.4

[− 4.3;6.5]

0.5

[− 4.9;5.8]

4.9***

[− 0.2;10.1]

\(|\overline{\Delta J}|\) (μV)

24.6

[14.9;40.3]

21.5

[13.1;35.3]

32.7**

[18.8;47.4]

25.7

[17.1;43.5]

22.8

[15.1;35.2]

68.6***

[41.5;122.7]

\(\Delta Tsym\) (%)

− 0.1

[− 3.1;2.5]

− 0.2

[− 2.8;1.5]

0.0

[− 5.1;4.1]

0.2

[− 2.8;2.5]

0.2

[− 2.4;2.1]

0.8

[− 4.3;5.4]

  1. Values are reported as percentiles 50th [25th;75th] percentiles
  2. *,**,***: reflects P-value \(<0.05\), \(<0.01\), \(<10^{-3}\), respectively, when comparing corresponding features computed for cases vs controls