Table 4 Baseline mean differences between patients that withdrew and completed the study.
Variable (mean or %, ± SD) | All N = 49 | Withdrawn N = 22 | Completers N = 27 | P-value | |
|---|---|---|---|---|---|
Smart phone data | N = 46 | N = 16 | N = 27 |  | |
 EMA Surveys Completed (%) | 79.1 ± 23.3 | 66.3 ± 25.7 | 88.2 ± 16.7 |  < 0.01* | |
 Ambulatory Assessments Completed (%) | 78.3 ± 23.3 | 65.9 ± 26.4 | 87.0 ± 16.3 |  < 0.01* | |
Perceived cognition | |||||
 Cognitive Ability (AU) | 76.3 ± 16.0 | 74.2 ± 16.7 | 77.7 ± 15.7 | 0.48 | |
 Days impairment reported (%) | 0.21 ± 0.30 | 0.26 ± 0.37 | 0.16 ± 0.23 | 0.30 | |
 Impairment Severity (AU) | 17.8 ± 16.9 | 20.3 ± 17.3 | 16.0 ± 16.6 | 0.40 | |
 Impairment Impact (AU) | 14.7 ± 17.9 | 19.2 ± 22.9 | 11.5 ± 12.9 | 0.21 | |
Objective cognition | |||||
 Symbol Search (RT) | 1814 ± 567 | 2011 ± 792 | 1675 ± 271 | 0.09 | |
 Change Detection (k-value) | 3.1 ± 0.6 | 3.0 ± 0.7 | 3.3 ± 0.5 | 0.17 | |
 Shopping List (# accurate trials) | 7.8 ± 1.0 | 7.7 ± 1.0 | 7.9 ± 0.9 | 0.44 | |
Affect (AU) | |||||
 Worried | 19.6 ± 20.1 | 22.4 ± 21.9 | 17.7 ± 18.9 | 0.46 | |
 Happy | 71.7 ± 17.4 | 73.9 ± 12.4 | 70.1 ± 20.3 | 0.44 | |
 Fatigue | 36.1 ± 22.5 | 36.9 ± 22.1 | 35.6 ± 23.1 | 0.84 | |
 Stress | 25.8 ± 23.4 | 27.2 ± 21.9 | 24.9 ± 24.9 | 0.75 | |
 Sad | 18.8 ± 19.8 | 19.1 ± 17.6 | 18.6 ± 21.6 | 0.94 | |
 Pain | 18.1 ± 19.8 | 18.7 ± 19.5 | 17.7 ± 20.3 | 0.86 | |
Nighttime sleep | N = 45 | N = 19 | N = 26 |  | |
 Valid days | 6.3 ± 2.2 | 5.1 ± 2.3 | 7.1 ± 1.8 |  < 0.01* | |
 Sleep Midpoint (military time, h) | 02:54 ± 01:00 | 02:54 ± 01:12 | 02:54 ± 00:54 | 0.93 | |
 Sleep Midpoint Variability (military time, h) | 00:37 ± 00:17 | 00:39 ± 00:20 | 00:35 ± 00:166 | 0.84 | |
 Total Sleep Time (h) | 7.6 ± 1.0 | 7.6 ± 1.3 | 7.7 ± 0.8 | 0.87 | |
 Total Sleep Time Variability (h) | 1.1 ± 0.5 | 1.4 ± 0.6 | 1.0 ± 0.4 | 0.07 | |
 WASO (min) | 44.2 ± 21.7 | 43.9 ± 19.5 | 44.5 ± 23.5 | 0.88 | |
Physical activity | N = 45 | N = 18 | N = 27 |  | |
 Valid Days | 6.5 ± 2.1 | 5.4 ± 2.2 | 7.2 ± 1.8 |  < 0.01* | |
 Wear Time (h/day) | 13.9 ± 2.7 | 13.6 ± 2.6 | 14.2 ± 2.7 | 0.35 | |
 Steps per day | 6638.2 ± 4696.6 | 7139.6 ± 4500.1 | 6303.9 ± 4878.3 | 0.51 | |
 Sedentary Time (%) | 70.6 ± 9.4 | 69.3 ± 8.5 | 71.6 ± 9.9 | 0.43 | |
 Light Activity Time (%) | 28.2 ± 8.9 | 29.1 ± 8.4 | 27.5 ± 9.4 | 0.57 | |
 Moderate Activity Time (%) | 1.2 ± 2.0 | 1.6 ± 3.0 | 0.92 ± 0.93 | 0.26 | |
