Table 1.
Sample Characteristics in Fatigued and Fatigue-Free Participants by Energy Status in the Health, Aging, and Body Composition Study at Baseline, Total N = 2 613
| Fatigue (n = 724) | Fatigue-Free (n = 1 889) | |||||
|---|---|---|---|---|---|---|
| Mean ± SD or n (column %) | ||||||
| Higher Energy | Lower Energy | p Value | Higher Energy | Lower Energy | p Value | |
| Energy level | 240 (33.2) | 484 (66.8) | 1 221 (64.7) | 668 (35.3) | ||
| Demographics and baseline health status | ||||||
| Age, y | 74.7 ± 2.9 | 74.9 ± 2.9 | .52 | 74.5 ± 2.8 | 74.7 ± 2.9 | .12 |
| Black | 110 (45.8) | 178 (36.8) | .02 | 475 (38.9) | 233 (34.9) | .08 |
| Female | 154 (64.2) | 306 (63.2) | .80 | 555 (45.5) | 319 (47.8) | .34 |
| Postsecondary education | 88 (36.8) | 199 (41.1) | .02 | 580 (47.6) | 306 (46.0) | .15 |
| Diabetes | 32 (13.3) | 79 (16.3) | .29 | 153 (12.5) | 105 (15.7) | .05 |
| Congestive heart failure | 8 (3.4) | 21 (4.4) | .49 | 20 (1.7) | 19 (2.9) | .08 |
| Cerebrovascular disease | 18 (7.5) | 47 (10.0) | .29 | 69 (5.7) | 65 (9.8) | <.01 |
| Peripheral arterial disease | 13 (5.6) | 31 (6.7) | .56 | 42 (3.5) | 44 (6.8) | <.01 |
| Coronary heart disease | 57 (24.0) | 135 (28.4) | .21 | 204 (16.9) | 160 (24.5) | <.01 |
| Incident hypertension | 130 (54.2) | 285 (58.9) | .23 | 588 (48.2) | 395 (59.2) | <.01 |
| Cancer | 37 (15.5) | 83 (17.2) | .56 | 198 (16.3) | 133 (19.9) | .05 |
| Current smoker | 103 (42.9) | 199 (41.1) | .78 | 587 (48.2) | 326 (48.8) | .22 |
| 400 m walk time, m/s | 333.1 ± 69.2 | 339.0 ± 61.8 | .86 | 311.1 ± 51.1 | 328.8 ± 57.6 | <.01 |
| Baseline values of outcome variables | ||||||
| Usual gait speed, m/s | 1.09 ± 0.20 | 1.06 ± 0.21 | .07 | 1.19 ± 0.21 | 1.12 ± 0.21 | <.01 |
| Rapid gait speed, m/s | 1.46 ± 0.31 | 1.42 ± 0.33 | .11 | 1.62 ± 0.32 | 1.52 ± 0.33 | <.01 |
| 3MS*, 0–100 | 89.0 ± 8.2 | 90.6 ± 7.5 | .01 | 90.9 ± 7.6 | 91.1 ± 7.1 | .05 |
| CES-D†, 0–60 | 5.8 ± 5.2 | 7.1 ± 7.0 | <.01 | 3.4 ± 4.0 | 4.8 ± 5.1 | <.01 |
| DSST‡ | 33.1 ± 16.5 | 35.5 ± 13.5 | .05 | 37.3 ± 14.4 | 37.0 ± 14.2 | .64 |
Notes: t Tests were used for continuous variables, and chi-square tests for categorical variables.
*Teng Mini-Mental State Examination.
†Center for Epidemiologic Studies Depression scale.
‡Digit Symbol Substitution Test.