Table 2.
Preliminary Objective Effectiveness Measures
| Baseline (N = 28) | Week 12 (N = 28) | Difference (N = 28) | Percent Change | p-Value | |
|---|---|---|---|---|---|
| Anthropometric | |||||
| Weight, kg | 98.4 (19.0) | 93.7 (19.4) | −4.62 (3.2) | −4.88 (3.4) | <.001 |
| BMI, kg/m2 | 37.1 (6.14) | 35.4 (6.4) | −1.76 (1.19) | −4.88 (3.39) | <.001 |
| Waist circumference, cm | 120.0 (32.95) | 109.4 (12.3) | −10.62 (32.2) | −6.02 (12.01) | .09 |
| Hip circumference, cm | 133.7 (34.43) | 121.1 (13.0) | −12.5 (35.0) | −6.87 (11.90) | .07 |
| Waist-to-hip ratio | 0.90 (0.08) | 0.90 (0.07) | 0.01 (0.06) | 1.09 (6.42) | .54 |
| Objective measures | |||||
| 6-min walk test, m | 405.9 (89.2) | 448.7 (88.2) | 35.7 (41.2) | 9.4 (11.0) | <.001 |
| 50 m improvement, n (%) | 9 (33.33) | ||||
| Maximum gait speed, s | 1.19 (0.26) | 1.29 (0.35) | 0.10 (0.24) | 8.92 (19.18) | .04 |
| Improved 0.1 m/s (%) | 12 (42.9) | ||||
| Mean grip strength, kg | 21.4 (8.2) | 22.27 (7.1) | 0.83 (5.6) | 9.82 (29.6) | .44 |
| Sit-to-stand, s | 9.77 (2.8) | 7.71 (2.2) | −2.06 (2.00) | −18.81 (18.09) | <.001 |
| Subjective measures | |||||
| Late-life functionality | |||||
| Total | 61.1 (8.1) | 67.2 (10.1) | 5.2 (7.1) | 8.6 (11.2) | .003 |
| Upper extremity | 79.6 (10.8) | 83.0 (10.7) | 3.0 (10.3) | 4.7 (13.0) | .19 |
| Basic lower extremity | 74.7 (13.6) | 83.2 (13.5) | 6.9 (11.2) | 10.4 (14.0) | .01 |
| Advanced lower extremity | 50.4 (13.0) | 59.4 (15.4) | 7.2 (9.4) | 14.2 (17.6) | .002 |
| PROMIS, total | |||||
| Mental health T score | 49.5 (8.5) | 54.8 (8.7) | 5.0 (5.7) | 10.9 (12.5) | <.001 |
| Physical health T score | 48.7 (6.4) | 53.4 (7.7) | 4.4 (5.0) | 9.3 (10.3) | <.001 |
| Fitbit activity measures | Mean | Range | Median | IQR | |
| % days worna | 93.9 (9.7) | 57.1–100.0 | 96.4 | 7.6 | |
| Steps per day | 6,133 (2,922) | 1,877–14,815 | 5,467 | 3,476 |
Notes: BMI = body mass index; IQR = interquartile range; PROMIS = Patient-Reported Outcome Measurement Information System. All values listed are mean (SD), or count (%).
aDays worn are represented Percent Change in Difference: the difference in the means as a percent of mean baseline measurement. Percent Change: the mean of an individuals change relative to their baseline.