Table 1.
Description of study sample demographics and cognitive reserve indicators.
| Sample Characteristics | Total Study Sample (n = 14,574) 1,2 n (%) |
Confusion or Memory Loss at W4 (n = 3262, 22%) 1,2 n (%) |
No Confusion or Memory Loss at W4 (n = 11,312, 78%) 1,2 n (%) |
|---|---|---|---|
| Probable PTSD | |||
| Yes | 1213 (8.3%) | 550 (16.7%) | 663 (5.9%) |
| No | 13,252 (90.9%) | 2675 (82.0%) | 10,577 (93.5%) |
| Gender | |||
| Male | 8975 (61.6%) | 2016 (61.8%) | 6959 (61.5%) |
| Female | 5599 (38.4%) | 1246 (38.2%) | 4353 (38.5%) |
| Age group | |||
| 35–44 years | 2827 (19.4%) | 570 (17.5%) | 2257 (20.0%) |
| 45–54 years | 5526 (37.9%) | 1277 (39.2%) | 4249 (37.6%) |
| 55–64 years | 6221 (42.7%) | 1415 (43.4%) | 4806 (42.5%) |
| Educational attainment | |||
| Bachelor’s degree or more | 8693 (59.7%) | 1666 (51.1%) | 7027 (62.1%) |
| Less than a bachelor’s degree | 5820 (39.9%) | 1576 (48.3%) | 4244 (37.5%) |
| Marital status | |||
| Married or living with partner | 10,482 (71.9%) | 2269 (69.6%) | 8213 (72.6%) |
| Divorced/separated, widowed, or never married | 4033 (27.7%) | 979 (30.0%) | 3054 (27.0%) |
| Employment status | |||
| Currently employed | 12,193 (83.7%) | 2671 (81.9%) | 9522 (84.2%) |
| Not currently employed | 2335 (16.0%) | 579 (17.8%) | 1756 (15.5%) |
| Number of close friends | |||
| Have 3 or more close friends | 12,719 (87.3%) | 2720 (83.4%) | 9999 (88.4%) |
| Have 0–2 close friends | 1452 (10.0%) | 448 (13.7%) | 1004 (8.9%) |
| Communicate with friends | |||
| Visited/talked/emailed with friends at least twice in last 30 days | 13,681 (93.9%) | 2950 (90.4%) | 10,731 (94.9%) |
| Did not visit/talk/email with friends at least twice in last 30 days | 729 (5.0%) | 265 (8.1%) | 464 (4.1%) |
| People who understand your problems | |||
| Someone is available to understand your problems most or all of the time | 9952 (68.3%) | 1888 (57.9%) | 8064 (71.3%) |
| Someone is available to understand your problems none to some of the time | 4401 (30.2%) | 1311 (40.2%) | 3090 (27.3%) |
| Physical activity | |||
| Very or somewhat physically active in general | 11,413 (78.3%) | 2287 (70.1%) | 9126 (80.7%) |
| Not or not very physically active in general | 3096 (21.2%) | 951 (29.2%) | 2145 (19.0%) |
1 Column percentages may sum to <100% due to missing data. 2 Column percentages may sum to >100% due to rounding. PTSD: posttraumatic stress disorder; W4: wave 4.