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Table 7 Results for regression models with first MI as a dependent variable with ECGA and additional independent variables of the 977 cohort participants of men aged 45–50 at baseline in 1993 followed for 25 years

From: Prospective associations between ECG abnormalities and death or myocardial infarction in a cohort of 980 employed, middle-aged Swedish men

Infarct models

Independent variable(s)

Estimated OR

95% confidence interval for OR

p value for OR

Pseudo-R2 for model, %

ECGA only (model 1)

ECGA = 0

Reference

  

2.11

ECGA = 1

3.16

(1.74; 5.73)

0.000

ECGA = 9

1.59

(0.82; 3.06)

0.168

FRI only (model 2)

FRI = 1

Reference

  

8.57

FRI = 2

6.35

(1.40; 28.8)

0.017

FRI = 3

9.27

(2.11; 40.7)

0.003

FRI = 4

14.3

(3.24; 61.5)

0.000

FRI = 5

25.4

(6.02; 106)

0.000

ECGA and FRI (model 3)

ECGA = 0

Reference

  

10.6

ECGA = 1

2.82

(1.51; 5.28)

0.001

ECGA = 9

1.43

(0.70; 2.89)

0.324

FRI = 1

Reference

  

FRI = 2

6.22

(1.36; 28.3

0.018

FRI = 3

7.98

(1.79; 35.5)

0.006

FRI = 4

14.1

(3.28; 60.6)

0.000

FRI = 5

24.3

(5.77; 103)

0.000

ECGA and FRI variables (model 4)

ECGA = 0

Reference

  

14.9

ECGA = 1

3.43

(1.74; 6.76)

0.000

ECGA = 9

1.24

(0.57; 2.70)

0.579

ECGA and all explanatory variables (model 5)

ECGA = 0

Reference

  

24.6

ECGA = 1

4.22

(1.85; 9.64)

0.001

ECGA = 9

1.18

(0.47; 2.96)

0.719

  1. ECG category 0, ECG performed 1993 and 1998, no ECGA; ECG category 1, ECG performed 1993 and/or 1998 with one or more abnormalities; and ECG category 9, ECG performed 1993 or 1998 without abnormality