TABLE 2.
Characteristics of medical encounters between January 2001 and December 2013 by data source. The Atherosclerosis Risk in Communities (ARIC) cohort
| Characteristic | Medicare | ARIC | Matched Sample |
|---|---|---|---|
| Hospital records | 38 334 | 34 739 | 25 549 |
| Age group | |||
| Aged <75 yrs. | 18 177 (47.4%) | 17 424 (50.2%) | 12 532 (49.1%) |
| Aged ≥75 yrs. | 20 157 (52.6%) | 17 315 (49.8%) | 13 017 (50.9%) |
| Sex | |||
| Female | 22 415 (58.5%) | 19 250 (55.4%) | 14 607 (57.2%) |
| Male | 15 919 (41.5%) | 15 489 (44.6%) | 10 942 (42.8%) |
| Center | |||
| Forsyth County | 8175 (21.3%) | 8665 (24.9%) | 5779 (22.6%) |
| Jackson | 10 193 (26.6%) | 9130 (26.3%) | 6682 (26.2%) |
| Minneapolis | 9698 (25.3%) | 7724 (22.2%) | 5538 (21.7%) |
| Washington County | 10 268 (26.8%) | 9220 (26.5%) | 7550 (29.6%) |
| Hospital type | |||
| Non-teaching | 21 025 (61.4%) | 16 083 (64.0%) | |
| Teaching | 9431 (27.5%) | 6580 (26.2%) | |
| Out of area | 3797 (11.1%) | 2475 (9.8%) | |
| Missing | 486 | 411 | |
| Unique beneficiaries | 8905 | 9523 | 7995 |
| Mean(SD) # of hospitalizations | 4.3 (4.66) | 3.6 (3.58) | 3.2 (3.21) |