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Table 6 Results for regression models with death 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

Death model 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    1.4
ECGA = 1 1.52 (0.83; 2.76) 0.106
ECGA = 9 2.09 1.26 3.46 0.001
FRI only (model 2) FRI = 1 Reference    2.9
FRI = 2 0.68 (0.35; 1.31) 0.248
FRI = 3 0.77 (0.40; 1.46)
0.418
FRI = 4 1.51 (0.66; 2.67) 0.154
FRI = 5 2.16 (1.25; 3.73) 0.006
ECGA and FRI (model 3) ECGA = 0 Reference    3.8
ECGA = 1 1.58 (0.85; 2.93) 0.146
ECGA = 9 1.84 (1.06; 3.20) 0.030
FRI = 1 Reference   
FRI = 2 0.68 (0.35; 1.32) 0.256
FRI = 3 0.69 (0.36; 1.34) 0.272
FRI = 4 1.40 (0.75; 2.51) 0.246
FRI = 5 2.12 (1.22; 3.69) 0.007
ECGA and FRI variables (model 4) ECGA = 0 Reference    8.3
ECGA = 1 1.41 (0.73; 2.73) 0.301
ECGA = 9 1.84 (1.01; 3.37) 0.048
ECGA and all explanatory variables (model 5) ECGA = 0 Reference    13.8
ECGA = 1 1.42 (0.69; 3.02) 0.247
ECGA = 9 2.52 (1.27; 4.97) 0.021
  1. ECG category 0, ECG performed in 1993 and 1998, no ECGA; ECG category 1, ECG performed in 1993 and/or 1998 with one or more abnormalities; and ECG category 9, ECG performed in 1993 or 1998 without abnormality