Table 2.
Use of PTSD Coach, version 3.1, among new users between April 20, 2020, and April 19, 2021, separated by platform.
| Use category | iOS users (n=80,006) | Android users (n=48,685) | Difference testa | Effect size | ||||||||||
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t test (df) | Chi-square (df) | Cohen d | Cramer V | ||||||||
| Overall use | ||||||||||||||
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Number of visits, mean (SD) | 3.18 (7.17) | 3.39 (7.78) | −3.66 (128,689) | N/Ab | 0.02 | N/A | |||||||
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Number events per visit, mean (SD) | 15.39 (23.57) | 22.00 (28.40) | −102.16 (128,689) | N/A | 0.61 | N/A | |||||||
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Visit duration (in minutes), mean (SD) | 4.12 (6.67) | 5.40 (7.78) | −101.95 (128,689) | N/A | 0.64 | N/A | |||||||
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Total duration (in minutes), mean (SD) | 16.03 (53.95) | 20.06 (65.50) | −99.52 (128,689) | N/A | 0.62 | N/A | |||||||
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Number of unique days, mean (SD) | 2.62 (4.67) | 2.83 (5.16) | −5.80 (128,689) | N/A | 0.03 | N/A | |||||||
| Use over time | ||||||||||||||
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Days between first and last use, mean (SD) | 30.21 (64.33) | 33.72 (66.04) | −5.44 (128,689) | N/A | 0.03 | N/A | |||||||
| Use of specific features | ||||||||||||||
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Home, n (%) | 47,718 (59.64) | 37,045 (76.09) | N/A | 3643.14 (1) | N/A | 0.17 | |||||||
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Number of content areas, mean (SD) | 1.24 (1.40) | 1.49 (1.40) | −30.52 (128,689) | N/A | 0.18 | N/A | |||||||
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Manage Symptoms content area, n (%) | 41,730 (52.16) | 29,919 (61.45) | N/A | 1060.20 (1) | N/A | 0.09 | |||||||
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Selected symptom | 34,396 (42.99) | 21,951 (45.09) | N/A | 54.02 (1) | N/A | 0.02 | ||||||
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Rated pretool SUDsc | 33,087 (41.36) | 23,884 (49.06) | N/A | 727.86 (1) | N/A | 0.08 | ||||||
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Rated pretool and posttool SUDsc | 7828 (9.78) | 10,013 (20.57) | N/A | 2946.87 (1) | N/A | 0.15 | ||||||
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Accessed coping tool | 31,056 (38.82) | 22,258 (45.72) | N/A | 594.30 (1) | N/A | 0.07 | ||||||
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Track Progress content area, n (%) | 20,275 (25.34) | 15,205 (31.23) | N/A | 525.90 (1) | N/A | 0.06 | |||||||
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Completed 1 PCL-5d | 10,137 (12.67) | 7452 (15.31) | N/A | 178.27 (1) | N/A | 0.04 | ||||||
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Completed ≥2 PCL-5s | 2785 (3.48) | 2402 (4.93) | N/A | 232.07 (1) | N/A | 0.04 | ||||||
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Set assessment reminder | 6507 (8.13) | 5140 (10.56) | N/A | 216.20 (1) | N/A | 0.04 | ||||||
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Learn content area, n (%) | 20,766 (25.96) | 15,900 (32.66) | N/A | 667.72 (1) | N/A | 0.07 | |||||||
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Accessed learn topic | 11,863 (14.83) | 9101 (18.69) | N/A | 331.82 (1) | N/A | 0.05 | ||||||
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Get Support content area, n (%) | 16,407 (20.51) | 11,294 (23.2) | N/A | 129.80 (1) | N/A | 0.03 | |||||||
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Accessed web or phone resource | 2346 (2.93) | 2189 (4.5) | N/A | 217.76 (1) | N/A | 0.04 | ||||||
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Added support contact | 2707 (3.38) | 3422 (7.03) | N/A | 886.82 (1) | N/A | 0.08 | ||||||
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Completed safety plan for suicide prevention, n (%) | 162 (0.2) | 158 (0.32) | N/A | 18.18 (1) | N/A | 0.01 | |||||||
aAll differences were statistically significant at P<.001.
bN/A: not applicable.
cSUDs: subjective units of distress.
dPCL-5: Posttraumatic Stress Disorder Checklist for DSM-5.