T wave alternans

without T wave alternans

Total

χ²

P

The study group

215

472

687

193.151

<0.01

The control group

19

653

672

Total

234

1125

1359

χ²

P

A with B

0.08

0.778

A with C

66.328

<0.01

A with D

73.951

<0.01

A with E

3.972

0.046

B with C

58.525

<0.01

B with D

67.341

<0.01

B with E

4.553

0.033

C with D

4.995

0.025

C with E

6.561

0.01

D with E

12.793

<0.01