Table 1. Demographic Characteristics of Participants, Stratified by Center for Epidemiologic Studies Depression 10-Item Scale (CES-D-10) Score of 8 or More at Baseline.
| Demographic categories | Patients, No. (%) | |||
|---|---|---|---|---|
| Aspirin group (n = 9524)a | Placebo group (n = 9586)a | |||
| CES-D-10 < 8 | CES-D-10 ≥ 8 | CES-D-10 < 8 | CES-D-10 ≥ 8 | |
| Total | 8599 (90.3) | 925 (9.7) | 8632 (90.0) | 954 (10.0) |
| Age, mean (SD), y | 75.1 (4.6) | 75.3 (4.8) | 75.1 (4.5) | 75.1 (4.6) |
| Weight, mean (SD), kg | 76.9 (15.0) | 77.6 (16.6) | 77.1 (14.7) | 76.6 (15.8) |
| BMI, mean (SD) | 28.0 (4.7) | 28.8 (5.5) | 28.0 (4.6) | 28.6 (5.3) |
| Female | 4778 (55.6) | 595 (64.3) | 4753 (55.1) | 653 (68.5) |
| Country | ||||
| Australia | 7526 (87.5) | 795 (86.0) | 7578 (87.8) | 800 (83.9) |
| United States | 1073 (12.5) | 130 (14.0) | 1054 (12.2) | 154 (16.1) |
| Living status | ||||
| At home alone | 2710 (31.5) | 387 (41.8) | 2739 (31.7) | 414 (43.4) |
| At home with family, friends, or a spouse | 5858 (68.1) | 529 (57.2) | 5856 (67.8) | 534 (56.0) |
| In a residential homeb | 31 (0.4) | 9 (1.0) | 37 (0.5) | 6 (0.6) |
| Hispanic/Latino ethnicity | 215 (2.5) | 25 (2.7) | 209 (2.4) | 39 (4.1) |
| Race | ||||
| White | 7992 (94.0) | 832 (90.6) | 8015 (93.8) | 855 (90.7) |
| Black/African American | 391 (4.6) | 66 (7.2) | 387 (4.5) | 65 (6.9) |
| Other | 124 (1.4) | 20 (2.2) | 143 (1.7) | 23 (2.4) |
| English-speaking | 8189 (95.2) | 885 (95.7) | 8274 (95.9) | 912 (95.6) |
| Born overseas | 1928 (22.4) | 215 (23.2) | 1937 (22.4) | 195 (20.4) |
| Education >12 y | 4744 (55.2) | 473 (51.2) | 4737 (54.9) | 523 (54.8) |
| Smoking status | ||||
| Current | 298 (3.5) | 54 (5.8) | 326 (3.8) | 56 (5.9) |
| Former | 3519 (40.9) | 389 (42.1) | 3522 (40.8) | 367 (38.4) |
| Never | 4782 (55.6) | 482 (52.1) | 4784 (55.4) | 531 (55.7) |
| Alcohol drinking | ||||
| Current | 6644 (77.3) | 664 (71.8) | 6629 (76.8) | 701 (73.5) |
| Former | 488 (5.7) | 78 (8.4) | 493 (5.7) | 77 (8.1) |
| Never | 1467 (17.0) | 183 (19.8) | 1510 (17.5) | 176 (18.4) |
| Depression historyc | ||||
| Unsure | 48 (1.6) | 8 (1.8) | 41 (1.4) | 12 (2.8) |
| No | 2356 (77.5) | 238 (53.1) | 2385 (78.2) | 216 (49.8) |
| Yes | 635 (20.9) | 202 (45.1) | 623 (20.4) | 206 (47.4) |
Abbreviation: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared).
a
One CES-D-10 score was missing in the aspirin group, and 3 were missing in the placebo group at baseline.
b
Supervised care or assisted living.
c
The question about a history of depression were only asked after June 2013 (n = 6970 participants).