Table 2.

Baseline demographics, ALSFRS-RSE survey and wearable device compliance.

Population
Total number of participants, N	20
Demographics
Age, mean (SD), median [min, max]	61.4 (10.6), 64 [34, 76]
Male, N (%)	12 (60%)
Female, N (%)	8 (40%)
Race
White, N (%)	17 (85%)
More Than One Race, N (%)	2 (10%)
Native Hawaiian or Other Pacific Islander, N (%)	1 (5%)
Handedness
Right	15 (75%)
Left	2 (10%)
Unknown	3 (15%)
Ethnicity
Not Hispanic or Latino, N (%)	18 (90%)
Mobile operating system
iOS, N (%)	15 (75%)
Android, N (%)	5 (25%)
Data collection compliance
Smartphone data
Number of surveys, mean (SD), median [min, max]	6.9 (3.6), 6 [2, 15]
Days between surveys, mean (SD), median [min, max]	36.8 (24.0), 32 [6, 112]
Accelerometer data
Days with collected accelerometer data, mean (SD), median [min, max]	170.4 (35.6), 178 [23, 191]
Days with valid accelerometer data, mean (SD), median [min, max]	97.4 (51.9), 124 [3, 165]

For compliance, patient-specific values are aggregated across all study participants. A valid day in the observation period was defined as a day with at least 1260 device wear time minutes (21 h).