Table 3.
Basic summary statistics of the behavioral and self-assessment data collected from smartphones.
| Type, daily variable | Completeness, n (%) | Median | Mean (SD) | |||
| Phone calls (count per patient day) | ||||||
|
|
Number of incoming answered calls | 982 (100) | 2.0 | 3.2 (3.5) | ||
|
|
Mean duration of incoming calls (s/call) | 820 (83.5) | 119.9 | 210.3 (286.3) | ||
|
|
SD of duration of incoming calls (s) | 600 (61.1) | 117.7 | 234.5 (324.3) | ||
|
|
Number of outgoing calls | 982 (100) | 4.0 | 7.5 (10.9) | ||
|
|
Mean duration of outgoing calls (s/call) | 886 (90.2) | 79.1 | 147.2 (232.8) | ||
|
|
SD of duration of outgoing calls (s) | 756 (77.4) | 113.3 | 195.9 (245.7) | ||
|
|
Fraction of outgoing calls | 886 (90.2) | 0.7 | 0.7 (0.2) | ||
|
|
Number of missed calls | 982 (100) | 1.0 | 1.8 (2.7) | ||
|
|
Fraction of missed calls | 982 (100) | 0.2 | 0.2 (0.2) | ||
|
|
Number of incoming + outgoing calls | 963 (98.0) | 105.8 | 170.2 (229.4) | ||
|
|
Mean duration of incoming + outgoing calls (s/call) | 877 (89.3) | 145.8 | 234.0 (256.8) | ||
|
|
SD of duration of incoming + outgoing calls (s) | 982 (100) | 8.0 | 12.5 (14.4) | ||
| Text messages | ||||||
|
|
Number of sent text messages | 982 (100) | 0.0 | 3.8 (13.3) | ||
|
|
Mean length of text messages | 343 (34.9) | 39.4 | 54.3 (48.7) | ||
| Activity | ||||||
|
|
Sum of steps | 103 (10.5) | 480 | 5299.9 (32454.8) | ||
|
|
Daily travelled distance (km) | —a | — | — | ||
| Self-assessment | ||||||
|
|
Self-assessment of sleep time (h) | 270 (27.5) | 8.0 | 8.0 (2.5) | ||
|
|
Self-assessment of mood (from −4 to +4) | 268 (27.3) | 0.0 | −0.6 (1.6) | ||
|
|
Comment about sleep (number of characters) | 39 (4) | 22.0 | 27.1 (21.0) | ||
|
|
Comment about mood (number of characters) | 37 (4) | 25.0 | 40.2 (46.6) | ||
aNot collected due to technical issues and privacy concerns.