Table 1:
Baseline characteristics of study participants according to TBI status, HRS, 2000–2014
| Total sample |
No TBI (n=2400) |
TBI (n=318) |
P value | |
|---|---|---|---|---|
| Women | 1487 (54.7) | 1375 (57.3) | 112 (34.8) | <.0001 |
| Age, mean (SD) | 66.7 (1.3) | 66.7 (1.3) | 66.8 (1.4) | 0.27 |
| Non white | 521 (12.5) | 489 (13.2) | 32 (7.5) | 0.003 |
| Education | 0.02 | |||
| Less than high school or GED | 891 (29.3) | 793 (29.4) | 98 (28.2) | |
| High school | 882 (33.7) | 793 (34.5) | 89 (28.0) | |
| College | 474 (18.2) | 405 (17.5) | 69 (23.5) | |
| Master’s or professional degree | 471 (18.8) | 409 (18.7) | 62 (20.3) | |
| Non Partnered | 843 (28.6) | 749 (28.6) | 94 (28.8) | 0.93 |
| Veterans | 807 (30.6) | 676 (28.9) | 131 (43.7) | <.0001 |
| Hypertension | 1342 (47.2) | 1185 (47.0) | 157 (48.9) | 0.38 |
| Diabetes | 463 (15.6) | 423 (15.9) | 40 (13.0) | 0.27 |
| Cancer | 319 (12.4) | 283 (12.6) | 36 (11.2) | 0.74 |
| Heart disease | 554 (20.1) | 473 (19.4) | 81 (25.3) | 0.02 |
| Stroke | 191 (6.5) | 153 (5.7) | 38 (12.3) | <.0001 |
| Lung disease | 229 (8.0) | 191 (7.6) | 38 (10.8) | 0.13 |
| Arthritis | 1544 (56.2) | 1343 (55.2) | 201 (63.6) | 0.01 |
| CESD | 0.22 | |||
| <3 | 2150 (80.1) | 1907 (80.6) | 243 (76.5) | |
| >=3 | 354 (12.6) | 308 (12.3) | 46 (14.8) | |
| Missing | 214 (7.3) | 185 (7.1) | 29 (8.7) | |
| Ever smoke | 1682 (62.1) | 1455 (61.0) | 227 (70.1) | 0.001 |
| No. of follow-up interviews, median (IQR) | 7 (5–8) | 7 (5–8) | 7 (4–8) | 0.16 |
| Follow-up time, median (IQR) | 13 (8–14) | 13 (8–14) | 13 (7–14) | 0.32 |
| Baseline memory score, mean (SD) | 1.05 (0.4) | 1.09 (0.4) | 1.05 (0.4) | 0.09 |
TBI: Traumatic Brain Injury; GED: general educational development; CESD: Center for Epidemiologic Studies Depression Scale; IQR: interquartile range.
Data are presented as raw numbers with weighted percentage for categorical variables, and weighted t test for continuous variables.