Table 1.
Demographic and Clinical Characteristics of Study Sample Overall and by Classification*
| Variable | Overall cohort (n = 289) | Superior integrators (n = 90) | Good integrators (n = 76) | Poor integrators (n = 79) | Deficient integrators (n = 44) |
|---|---|---|---|---|---|
| % Of study cohort | 100 | 31 | 26 | 28 | 15 |
| % Female | 53 | 46 | 62 | 56 | 48 |
| % Caucasian | 78 | 83 | 67 | 76 | 86 |
| % Moderate visual impairment | 27 | 22 | 26 | 34 | 27 |
| % With neuropathy | 5 | 4 | 5 | 5 | 5 |
| % With prevalent falls | 24 | 17 | 29 | 25 | 30 |
| % With incident falls | 52 | 42 | 46 | 54 | 80 |
| Time to fall (d) | 726.85 (515.28) 60–1,994 | 769.27 (561.18) 88–1,944 | 759.63 (529.74) 120–1,714 | 719.91 (493.70) 60–1,691 | 595.91 (414.28) 60–1,431 |
| Age (y) | 76.67 (6.37) 65–93 | 76.39 (6.08) 65–92 | 75.78 (5.88) 66–91 | 77.03 (6.92) 65–93 | 78.14 (6.60) 67–92 |
| Education (y) | 14.96 (2.89) 5–21 | 15.13 (2.61) 8–21 | 14.82 (3.00) 5–21 | 15.00 (2.98) 8–21 | 14.77 (3.15) 8–21 |
| GHS (0–10) | 1.18 (0.95) 0–4 | 0.90 (0.86) 0–3 | 1.18 (0.93) 0–4 | 1.41 (0.91) 0–3 | 1.34 (1.10) 0–4 |
| RBANS total score (65–135) | 94.48 (11.81) 65–132 | 95.83 (11.70) 76–130 | 96.08 (11.69) 65–118 | 92.38 (11.12) 65–132 | 92.77 (12.98) 70–126 |
| Overall RT (ms) | 398.65 (101.90) 243–945 | 398.72 (101.80) 258–822 | 381.50 (76.67) 243–764 | 403.40 (108.93) 248–781 | 419.60 (123.77) 278–945 |
| Somatosensory RT (ms) | 439.18 (112.12) 252–895 | 441.19 (119.80) 273–880 | 421.72 (86.72) 271–743 | 442.42 (114.13) 252–848 | 459.42 (129.45) 289–895 |
| Visual RT (ms) | 399.13 (109.15) 233–1050 | 399.81 (98.79) 262–805 | 382.73 (98.27) 233–1050 | 405.10 (121.67) 250–901 | 415.37 (122.83) 275–915 |
| VS RT (ms) | 358.39 (100.55) 213–1019 | 355.67 (94.95) 239–781 | 341.77 (66.85) 226–617 | 362.64 (111.55) 213–793 | 385.02 (132.02) 245–1019 |
| RT facilitation (ms) | 32.18 (34.93) –135–132 | 38.45 (24.05) –11–115 | 33.23 (25.17) –45–84 | 27.96 (45.19) –135–132 | 25.15 (44.67) –123–112 |
| VS integration† | 0.04 (0.14) –0.32–0.49 | 0.16 (0.09) 0.04–0.41 | 0.08 (0.09) –0.05–0.49 | –0.04 (0.11) –0.31–0.26 | –0.11 (0.08) –0.32– –0.01 |
| Unipedal stance time (s) | 15.14 (11.16) 0–30 | 16.43 (10.72) 0–30 | 16.83 (11.04) 0–30 | 13.49 (11.66) 0–30 | 12.57 (10.79) 0–30 |
Notes: GHS = global health score; RBANS = Repeatable Battery for Assessment of Neuropsychological Status; RT = reaction time; VS = visual–somatosensory.
*Values are presented as mean ± SD for continuous variables and % for dichotomous variable, followed by the range.
†Area under the curve of the cumulative distribution function difference wave over the 0–10 percentile.