Table 3.

Hazard ratio for stroke^* contrasting any PVC^† vs. no PVC by subgroup of traditional risk factors: The Atherosclerosis Risk In Communities Study

Subgroup	Hazard ratio (95% CI)‡			% of cohort
Diabetes	0.73	0.4	1.32	9
Hypertension	1.00	0.72	1.41	34
No diabetes and no hypertension	1.72	1.14	2.59	62
None of the four traditional risk factors§	2.09	1.21	3.58	44
Complete study sample	1.20	0.91	1.52	100

^*Incident stroke cases from study enrollment (1987-89) through 31st December 2004

^†PVC (premature ventricular complexes) coded by investigators using 2-minute (3-lead ECG strips) at baseline

^‡Estimates from models adjusted for age, gender, race, education, resting heart rate, LDL-cholesterol, HDL-cholesterol, serum K+, and serum Mg⁺⁺; models were additionally adjusted for hypertension, diabetes, prevalent CHD, and smoking whenever appropriate

^§No diabetes, hypertension, smoking history, or CHD at study baseline