Table 1.
Baseline Characteristics of the Analytic Sample from the LIFE Study by Perceived Fatigability Status (N=29). Mean (standard deviations) or numbers (%) are reported.
| Perceived Fatigability Status | |||||
|---|---|---|---|---|---|
| Physical | Mental | ||||
| Higher | Lower | Higher | Lower | ||
| Characteristic | Total | (≥15) | (<15) | (≥13) | (<13) |
| N=29 | (n=19) | (n=10) | (n=19) | (n=10) | |
| Age, years | 77.2±5.5 | 77.5±5.9 | 76.6±4.9 | 78.5±5.6 | 74.9±4.6* |
| Race, Caucasian/White | 11(37.9) | 9(47.4) | 2(20.0) | 8(42.1) | 3(30.0) |
| Sex, Female | 25(86.2) | 17(89.5) | 8(80.0) | 17(89.5) | 8(80.0) |
| Education≥ High School, years | 9(31.0) | 6(31.6) | 3(30.0) | 5(26.32) | 4(40.0) |
| Smoking Status, Former or Current | 10(34.5) | 5(26.3) | 5(50.0) | 4(21.1) | 6(60.0)* |
| Body Mass Index, m/kg2 | 31.4±4.9 | 31.6±5.2 | 30.8±4.4 | 31.3±5.0 | 31.5±5.0 |
| Cardiovascular Disease, Yes, self-report | 6(20.7) | 5(26.3) | 1(10.0) | 4(21.1) | 2(20.0) |
| Diabetes/high blood sugar, Yes, self-report | 10(34.5) | 7(36.8) | 3(30.0) | 7(36.8) | 3(30.0) |
| Depression Score, ≥16 | 4(13.8) | 4(21.1) | 0(0.0) | 4(21.1) | 0(0.0) |
| Usual gait speed, m/s | 0.81±0.20 | 0.73±0.15 | 0.96±0.20* | 0.76±0.20 | 0.90±0.16* |
| Usual-paced 400-m walk time, seconds | 491.8±119.6 | 523.2±131.0 | 432.2±64.1* | 519.5±127.2 | 439.3±86.1* |
| Short Physical Performance Battery Score, 0–12 points | 7.6±1.4 | 7.2±1.5 | 8.5±0.7* | 7.3±1.5 | 8.2±1.3* |
| Mini-Mental State Examination score, Points | 90.9±5.7 | 91.1±6.0 | 90.3±5.2 | 90.5±5.7 | 91.7±5.8 |
| Digit Symbol Substitution Score, points | 44.8±13.0 | 47.0±13.0 | 40.8±12.8 | 46.4±12.5 | 41.9±14.2 |
*
P<0.1 for the test of mean differences between higher and lower fatigability within physical or mental fatigability status