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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Circulation. 2011 Jan 17;123(4):374–380. doi: 10.1161/CIRCULATIONAHA.110.976613

Table 1. Characteristics of the participants by myocardial infarction (MI) status.

MI Cases Non-MI Controls P*
n of participants 1989 2096
Age, years 58.5 (11.1) 58.3 (11.3) 0.64
Female, % 26.1 26.2 0.94
Area of residence, % rural 26 26.4 0.87
Waist-to-hip ratio 0.97 (0.07) 0.95 (0.07) <0.0001
Physical activity, MET hours/day 34.3 (15.9) 35.6 (16.2) 0.01
Alcohol consumption, g/day 7.41 (19.53) 5.95 (14.42) 0.007
Total calories, kcal/day 2705 (945) 2450 (771) <0.0001
Current smoker, % 39.8 21.6 <0.0001
Family history of CHD, % 12.2 7.7 <0.0001
Genotyping call rate, % 98.5 98.5 0.99

MET, metabolic equivalent task; CHD, coronary heart disease

*

for continuous variables, we use general linear model for comparisons; and for categorical variables, we used chi-square test.