Table 1.
Baseline characteristics of Atherosclerosis Risk in Communities (ARIC) cohort members that participated in the ambulatory electrocardiography study, stratified by race, 2014–2016, N=2,434 (weighted* for sampling and non-response)
| White | African American | p-value | |
|---|---|---|---|
| Age in years, mean ± SD | 78 ± 8 | 77 ± 6 | 0.01 |
| Female, n(%) | 696 (55) | 778 (67) | <0.01 |
| Former smoker, n(%) | 593 (53) | 505 (48) | 0.02 |
| Obese, n(%) | 353 (28) | 552 (47) | <0.01 |
| Hypertension, n(%) | 828 (65) | 1004 (87) | <0.01 |
| Diabetes, n(%) | 339 (27) | 415 (36) | <0.01 |
| Enlarged left atrial volume index, n(%) | 218 (17) | 226 (19) | 0.16 |
| Prevalent coronary heart disease, n(%) | 226 (18) | 99 (8) | <0.01 |
| Estimated Glomerular Filtration Rate (eGFR) | |||
| eGFR = 0 to <30 ml/min/1.73 m2 | 21 (2) | 17 (1) | <0.01 |
| eGFR = 30 to <60 ml/min/1.73 m2 | 351 (28) | 254 (22) | |
| eGFR >=60 ml/min/1.73 m2 | 888 (70) | 882 (76) | |
| Premature Atrial Contractions (PAC) from 48 Hour Holter | |||
| PACs <1% (Referent) | 1034 (82) | 962 (83) | 0.32 |
| PACs 1 – 5% (Occasional) | 169 (13) | 158 (14) | |
| PACs >5% (Frequent) | 65 (5) | 45 (4) | |
| AF on ECG from any of 5 ARIC study visits, n(%) | 35 (3) | 9 (1) | <0.01 |
| AF from ARIC ECG or hospitalization discharge code, n(%) | 99 (8) | 38 (3) | <0.01 |
*
Analyses based on 1,193 participants, N=742 African Americans and N=451 Whites weighted for non-response and sampling design