Table 2  Population characteristics by case-control status
CharacteristicCase (n = 889)Control (n= 927)Pa
Age (mean ± SD, years)41.3 ± 6.939.6 ± 6.8<0.001
Female (%)41.543.60.37
Self-reported ethnicity (%)
 White52.4256.420.22
 African American42.4138.51
 Other5.175.07
Subtype (%)
 Cardioembolic20.0
 Large artery7.1
 Lacunar16.1
 Other known cause6.5
 Undetermined cause50.3
Hypertension (%)42.719.2<0.001
Diabetes mellitus (%)16.75.1<0.001
Angina/myocardial infarction (%)5.30.7<0.001
Current smoker (%)42.528.6<0.001
  • a Unadjusted P values for age, sex, and race; age and sex-adjusted P values for other characteristics.