Table 3.

Prevalence odds ratio of atrial fibrillation among African Americans compared to Whites, according to two definitions of AF, and asymptomatic and paroxysmal atrial fibrillation, 2014–2016, N=2,434 (weighted for sampling design and non-response)

	Odds of AF	Odds Ratio (95% CI)*
Model 1: Atrial Fibrillation defined on aECG, ARIC study visit ECG, or Hospitalization
African American	50/1116	0.42 (0.25,0.72)
White	124/1144	1.
Model 2: Atrial Fibrillation occurrence defined by aECG or ARIC study visit ECG
African American	28/1138	0.48 (0.23,0.99)
White	64/1204	1.
Model 3: Asymptomatic Atrial Fibrillation† defined on aECG
African American	23/1139	0.54 (0.24, 1.22)
White	48/1209	1.
Model 4: Paroxysmal Atrial Fibrillation defined on aECG‡
African American	13/1138	1.04 (0.29,3.72)
White	18/1207	1

^*Odds ratios and 95% confidence intervals adjusted for gender, prevalent CHD, age, eGFR, hypertension and diabetes. Odds ratios that are bolded were statistically significant (P < 0.05).

^†Asymptomatic AF defined by AF on Holter and no symptoms on post-test questionnaire. Symptoms defined by any of the following self-reported symptoms while wearing the Holter: racing or irregular heartbeat, dizziness, or fainting.

^‡Paroxysmal AF was defined by time in AF <99%; time in AF does not include 0%