TABLE 1.
Baseline Characteristics of Study Population
| Prevalent Atrial Fibrillation | Incident Atrial Fibrillation | |||||
|---|---|---|---|---|---|---|
| Follow-up Period | 6 Months | 9 Months | 12 Months | 6 Months | 9 Months | 12 Months |
| Number of patients | 2,893 | 1,713 | 768 | 408 | 238 | 96 |
| Age, mean (SE) | 63.0 (11.6) | 63.0 (11.6) | 63.0 (11.6) | 64.4 (11.6) | 65.2 (12.3) | 65.0 (12.5) |
| Age, n (%) | ||||||
| 18-44 | 116 (4.0) | 66 (3.9) | 32 (4.2) | 16 (3.9) | 9 (3.8) | 4 (4.2) |
| 45-64 | 1,733 (59.9) | 1,034 (60.4) | 469 (61.1) | 217 (53.2) | 126 (52.9) | 52 (54.2) |
| 65-74 | 552 (19.1) | 320 (18.7) | 141 (18.4) | 97 (23.8) | 51 (21.4) | 17 (17.7) |
| 75+ | 492 (17.0) | 293 (17.1) | 126 (16.4) | 78 (19.1) | 52 (21.8) | 23 (24.0) |
| Gender, n (%) | ||||||
| Male | 1,999 (69.1) | 1,211 (70.7) | 554 (72.1) | 309 (75.7) | 176 (73.9) | 65 (67.7) |
| Female | 894 (30.9) | 502 (29.3) | 214 (27.9) | 99 (24.3) | 62 (26.1) | 31 (32.3) |
| Region of residence, n (%) | ||||||
| East | 295 (10.2) | 164 (9.6) | 88 (11.5) | 38 (9.3) | 25 (10.5) | 11 (11.5) |
| Midwest | 901 (31.1) | 557 (32.5) | 274 (35.7) | 129 (31.6) | 73 (30.7) | 33 (34.4) |
| South | 1,394 (48.2) | 806 (47.1) | 315 (41.0) | 201 (49.3) | 116 (48.7) | 46 (47.9) |
| West | 303 (10.5) | 186 (10.9) | 91 (11.8) | 40 (9.8) | 24 (10.1) | 6 (6.3) |
| CHADS2, mean (SE) | 1.47 (1.13) | 1.44 (1.09) | 1.43 (1.08) | 1.53 (1.12) | 1.52 (1.05) | 1.69 (1.05) |
| CHADS2, n (%) | ||||||
| 0 | 557 (19.3) | 332 (19.4) | 145 (18.9) | 77 (18.9) | 41 (17.2) | 12 (12.5) |
| 1 | 1,089 (37.6) | 651 (38.0) | 302 (39.3) | 131 (32.1) | 78 (32.8) | 30 (31.3) |
| 2 | 776 (26.8) | 465 (27.1) | 209 (27.2) | 138 (33.8) | 85 (35.7) | 36 (37.5) |
| 3 | 314 (10.9) | 184 (10.7) | 80 (10.4) | 36 (8.8) | 23 (9.7) | 12 (12.5) |
| 4 | 117 (4.0) | 64 (3.7) | 23 (3.0) | 22 (5.4) | 10 (4.2) | 6 (6.3) |
| 5 | 37 (1.3) | 16 (0.9) | 8 (1.0) | 4 (1.0) | 1 (0.4) | 0 (0.0) |
| 6 | 3 (0.1) | 1 (0.1) | 1 (0.1) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
Source: IMS Health LifeLink Health Plan Claims Database, 2010-2012.23
Note: 12-month and 9-month cohorts were derived from the 6-month cohort.
SE = standard error.