Table 5. Hazard ratio (95% confidence interval) of atrial fibrillation by combined dietary and biomarker DHA and EPA, ARIC Minnesota field center, 1987–2005.

Tertiles	Both Lowest Tertile	Other	Both Highest Tertile			P for trend
AF cases	78	255	67
Person-years	11,708	43,270	11,856
HR (95% CI)*	1.0 (ref.)	0.95 (0.72–1.24)	0.98 (0.69–1.39)			0.91

^*Adjusted for age, sex, BMI, education, energy intake, exercise levels, smoking status and amount, alcohol intake, total cholesterol, use of cholesterol lowering medications, systolic blood pressure, use of antihypertensive medications, diabetes, coronary heart disease, and ECG-defined left ventricular hypertrophy.

CI: Confidence interval. HR: hazard ratio.