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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: J Electrocardiol. 2009 Dec 9;43(3):209–214. doi: 10.1016/j.jelectrocard.2009.10.002

Table 4.

Hazards ratios and 95% Confidence interval (HR: 95%) of all cause mortality and cardiovascular mortality stratified by ECG recording method in a multivariable Cox Proportional Hazards Analysis

All Cause Mortality Cardiovascular Mortality
Model 1 Model 2 Model 3 Model 1 Model 2 Model 3
Age + Race + Sex Model 1+
hypertension
+ diabetes +
history of
heart disease
+ history of
stroke/ TIA		 Model 2+
Socioeconomic
status		 Age + Race +
Sex		 Model 1+
hypertension +
diabetes + history of
heart disease +
history of stroke/ TIA		 Model 2+
Socioeconomic
status
7-Lead ECG 1.65
(1.31 – 2.06)		 1.54
(1.22 – 1.95)		 1.50
(1.19 – 1.90)		 2.27
(1.59 – 3.23)		 1.92
(1.32 – 2.85)		 1.87
(1.28 – 2.73)
12-Lead ECG 1.82
(1.31 – 2.05)		 1.59
(1.25 – 2.02)		 1.60
(1.26 – 2.04)		 2.57
(1.80 – 3.68)		 2.16
(1.49 – 3.11)		 2.21
(1.53 – 3.19)
P-value* 0.54 0.85 0.70 0.60 0.65 0.51
*

P value for comparison of the Hazard ratios in the 7-Lead ECG group vs. the 12-Lead ECG group