Table 3

Risk of SCD, non-SCD, all-cause mortality and cardiac hospitalisation associated with the ECG risk score in a 10-year follow-up in the Mini-Finland Health Survey

ECG risk score
0
n=4563		1
n=1859		2
n=312		≥3
n=96
SCD
 # of SCDs30552216
 Age-adjusted and sex-adjusted
 HR (95% CI)		13.42
(2.18 to 5.36)		6.79
(3.85 to 11.98)		15.89
(8.42 to 29.97)
 Multivariate adjusted
 HR (95% CI)		13.11
(1.98 to 4.89)		5.59
(3.13 to 9.98)		10.23
(5.29 to 19.80)
Non-SCD
 # of non-SCDs1051025825
 Age-adjusted and sex-adjusted
 HR (95% CI)		11.55
(1.17 to 2.04)		3.65
(2.62 to 5.09)		4.84
(3.09 to 7.57)
 Multivariate adjusted
 HR (95% CI)		11.37
(1.03 to 1.80)		2.90
(2.07 to 4.07)		2.83
(1.79 to 4.48)
Death from any cause
 # of deaths41436613967
 Age-adjusted and sex-adjusted
 HR (95% CI)		11.50
(1.31 to 1.74)		2.57
(2.11 to 3.13)		3.85
(2.96 to 5.02)
 Multivariate adjusted
 HR (95% CI)		11.41
(1.22 to 1.62)		2.23
(1.82 to 2.73)		2.80
(2.14 to 3.68)
Cardiac hospitalisation
 # of hospitalisations48938314153
 Age-adjusted and sex-adjusted
 HR (95% CI)		11.41
(1.23 to 1.61)		2.58
(2.13 to 3.13)		2.98
(2.23 to 3.98)
 Multivariate adjusted
 HR (95% CI)		11.26
(1.10 to 1.44)		2.05
(1.68 to 2.50)		2.01
(1.49 to 2.70)

  • The ECG risk score consisted of five ECG abnormalities: heart rate >80 bpm, PR duration >220 ms, QRS duration>110 ms, LVH and T-wave inversion. The age-adjusted and sex-adjusted and the multivariate adjusted HRs and 95% CIs for SCD, non-SCD, all-cause mortality and hospitalisation due to coronary artery disease or heart failure (cardiac hospitalisation) in the 10-year follow-up were calculated using the Cox proportional hazards model. Variables included in the multivariate analyses consisted of age, sex, systolic blood pressure, total serum cholesterol, diabetes, current smoker, coronary artery disease and the ECG risk score.

  • bpm, beats per minute; LVH, left ventricular hypertrophy; SCD, sudden cardiac death.