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Table 5 Estimated percentages of “yes” response, with confidence intervals in brackets for dichotomous risk factors by ECG category

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

Risk factor ECG category 0 (n = 790) ECG category 1 (n = 79) ECG category 9 (n = 108)
Blue collar workers 39 (36–43) 39 (27–50) 36 (26–46)
Married or cohabiting 77 (74–80) 79 (69–88) 74 (65–83)
Noisy work environment 3.7 (2.4–5.0) 8.0 (1.7–14.3) 5.3 (0.69–9.83)
Smoker 28 (25–31) 26 (16–36) 30 (20–39)
Diabetes at baseline 0.008 (0.001–0.014) 0.039 (0.000–0.084) 0.042 (0.000–0.0832)
Hypertension at baseline 8.8 (6.79–10.7) 21 (11.6–30.4) 9.5 (3.48–15.4)
Family heart attack 23 (20.0–25.8) 29 (18.8–39.9) 27 (18.2–36.4)
  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