Table 2.
Participant characteristics.
| Characteristics | Groups | P valuea | ||
|
|
Overall (n=36) |
Intact mobility (n=20) |
Limited mobility (n=16) |
|
| Female, n (%) | 19 (53) | 7 (35) | 12 (75) | .02 |
| Age (years), mean (SD) | 71.4 (4.7) | 73.1 (3.7) | 71.6 (5.8) | .40 |
| Weight (kg), mean (SD) | 82.0 (16.8) | 78.1 (17.4) | 87.0 (15.1) | .11 |
| BMI (kg/m2), mean (SD) | 29.4 (5.9) | 27.7 (4.4) | 31.5 (7.0) | .07 |
| White, n (%) | 25 (69) | 13 (65) | 12 (75) | .46 |
| University education, n (%) | 16 (44) | 9 (45) | 7 (44) | >.99 |
| Montreal Cognitive Assessment (of 30), median (IQR) | 27 (26-28) | 27 (26-27) | 28 (27-29) | .03b |
| Smoked previously, n (%) | 17 (47) | 8 (40) | 9 (56) | .33c |
| Good or excellent self-rated health, n (%) | 29 (81) | 18 (90) | 11 (69) | .20 |
| Short Physical Performance Battery (of 12), median (IQR) | 11.0 (10.0-11.0) | 11.0 (10.0-12.0) | 10.0 (9.8-11.0) | .06b |
| 6-meter gait speed (m/s), mean (SD) | 1.2 (0.2) | 1.3 (0.2) | 1.1 (0.2) | <.001 |
| 400-meter gait speed (m/s), mean (SD) | 1.3 (0.2) | 1.4 (0.1) | 1.2 (0.2) | <.001 |
| 400-meter continuous walk step count, mean (SD) | 600 (70) | 562 (29) | 648 (76) | <.001 |
| 400-meter interrupted walk step count, mean (SD) | 656 (73) | 617 (41) | 703 (77) | <.001 |
| Self-reported moderate-to-vigorous physical activityd (min/week), mean (SD) | 343 (368) | 343 (272) | 343 (471) | .10 |
| Self-reported walking (min/week), mean (SD) | 208 (197) | 240 (208) | 167 (182) | .27 |
| Number of comorbidities, median (IQR) | 2.0 (0.0-3.0) | 0.0 (0.0-2.0) | 2.5 (1.0-4.0) | .02b |
| ≥1 comorbidity, n (%) | 19 (53) | 8 (40) | 11 (69) | .04 |
| ≥2 comorbidities, n (%) | 12 (33) | 4 (20) | 8 (50) | .09c |
| Arthritis, n (%) | 13 (36) | 4 (20) | 9 (56) | .04 |
| Obesity, n (%) | 10 (28) | 3 (15) | 7 (44) | .07 |
| Visual impairmentse, n (%) | 10 (28) | 7 (35) | 3 (19) | .46 |
| Degenerative disc diseasef, n (%) | 6 (17) | 2 (10) | 4 (25) | .37 |
| Depression, n (%) | 4 (11) | 1 (5) | 3 (19) | .30 |
| Diabetes (type 1 or 2), n (%) | 4 (11) | 1 (5) | 3 (19) | .30 |
| Osteoporosis, n (%) | 3 (8) | 0 (0) | 3 (19) | .08 |
| Access to a computer with internet, n (%) | 31 (86) | 17 (85) | 14 (88) | >.99 |
| Access to cellphone or smartphone, n (%) | 33 (92) | 18 (90) | 14 (88) | .57 |
aP values comparing intact mobility versus limited mobility, from a chi-square Fisher exact test for categorical variables and from an independent sample t test for continuous variables.
bFrom a Wilcoxon rank-sum test.
cFrom a chi-square Pearson test.
dModerate-to-vigorous physical activity includes self-reported walking.
eFor example, cataracts, glaucoma, and macular degeneration.
fFor example, back disease, spinal stenosis, or severe chronic back pain.