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Table 3 Passive remote measurement technology data availability stratified by baseline depression status and measurement

From: Remote Assessment of Disease and Relapse in Major Depressive Disorder (RADAR-MDD): recruitment, retention, and data availability in a longitudinal remote measurement study

Data Type Data Completiona Total Sample (n = 623) No/Some Baseline Depression Symptoms (n = 245) High Baseline Depression Symptoms (n = 378) X2 (P value)
   N (%) N (%) N (%)  
Battery Level Any data 603 (96.8) 232 (94.7) 371 (98.1)  
No data 20 (3.2) 13 (5.3) 7 (1.9)  
0–25% 239 (38.4) 83 (33.9) 156 (41.3) 4.9 (0.18)
26–50% 126 (20.2) 48 (19.6) 78 (20.6)
51–75% 132 (21.2) 57 (23.3) 75 (19.8)
76 + % 126 (20.2) 57 (23.3) 69 (18.3)
Gyroscope Any data 561 (90.0) 217 (88.6) 344 (91.0)  
No data 62 (10.0) 28 (11.4) 34 (9.0)  
0–25% 293 (47.0) 106 (43.3) 187 (49.5) 4.6 (0.19)
26–50% 129 (20.7) 48 (19.6) 81 (21.4)  
51–75% 127 (20.4) 59 (24.1) 68 (18.0)  
76 + % 74 (11.9) 32 (13.1) 42 (11.1)  
Ambient Light Any data 583 (93.6) 223 (91.0) 360 (95.2)  
No data 40 (6.4) 22 (9.0) 18 (4.8)  
0–25% 250 (40.1) 89 (36.3) 161 (42.6) 3.7 (0.30)
26–50% 125 (20.1) 48 (19.6) 77 (20.4)  
51–75% 122 (19.6) 51 (20.8) 71 (18.8)  
76 + % 126 (20.2) 57 (23.3) 69 (18.3)  
Ambient Noise Any data 581 (93.3) 222 (90.6) 359 (95.0)  
No data 42 (6.7) 23 (9.4) 19 (5.0)  
0–25% 273 (43.8) 100 (40.8) 173 (45.8) 5.4 (0.15)
26–50% 134 (21.5) 47 (19.2) 87 (23.0)  
51–75% 124 (19.9) 58 (23.7) 66 (17.5)  
76 + % 92 (14.8) 40 (16.3) 52 (13.8)  
GPS Location Any data 603 (96.8) 232 (94.7) 371 (98.2)  
No data 20 (3.2) 13 (5.3) 7 (1.8)  
0–25% 246 (39.5) 85 (34.7) 161 (42.6) 5.3 (0.15)
26–50% 133 (21.3) 51 (20.8) 82 (21.7)  
51–75% 129 (20.7) 58 (23.7) 71 (18.8)  
76 + % 115 (18.5) 51 (20.8) 64 (16.9)  
Bluetooth Devices Any data 596 (95.7) 231 (94.3) 365 (96.6)  
No data 27 (4.3) 14 (5.7) 13 (3.4)  
0–25% 237 (38.0) 82 (33.5) 155 (41.0) 5.4 (0.15)
26–50% 128 (20.5) 48 (19.6) 80 (21.2)  
51–75% 133 (21.3) 59 (24.1) 74 (19.6)  
76 + % 125 (20.1) 56 (22.9) 69 (18.3)  
App Useb Any data 579 (92.9) 225 (91.8) 354 (93.7)  
No data 44 (7.1) 20 (8.2) 24 (6.3)  
0–25% 240 (38.5) 82 (33.5) 158 (41.8) 9.8 (0.02)
26–50% 133 (21.3) 46 (18.8) 87 (23.0)  
51–75% 122 (19.6) 58 (23.7) 64 (16.9)  
76 + % 128 (20.5) 59 (24.1) 69 (18.3)  
Phone interactionsc Any data 584 (93.7) 225 (9.2) 359 (95.0  
No data 39 (6.3) 20 (8.9) 19 (5.0)  
0–25% 237 (38.0) 83 (33.9) 154 (40.7) 8.8 (0.03)
26–50% 136 (21.8) 46 (18.8) 90 (23.8)  
51–75% 119 (19.1) 55 (22.5) 64 (16.9)  
76 + % 131 (21.0) 61 (24.9) 70 (18.5)  
  1. aCalculated as the total number of days in which at least one data point has been provided. bApp names, foreground or background app use, time spent using apps. cHow individuals interact with their phones, including phone screen on time, number of interactions with keyboard, screen touches, and extent to which the phone is asleep or awake