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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
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BMC Psychiatry

ISSN: 1471-244X

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