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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