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. 2021 Apr 16;9(4):e21087. doi: 10.2196/21087

Table 2.

Use of CAREs features on both webpage and app ends.

Features Rate of users with at least one use (%) Mean totala
Social workers (webpage end)

Record urine test results 20 (100) 32.87

Location tracking 16 (80) 12.04

View assessment information 12 (60) 26.56

Send urine test reminder 7 (35) 3.47

Send assessment reminder 3 (15) 0.65
Drug users (app end)

Assessment 20 (100) 24.15

Education 15 (75) 63.3

SOS



Music relaxation 9 (45) 2.65


Abdominal breathing 7 (35) 1.6


Hotline for doctors 3 (15) 0.25


Hotline for voluntary drug rehabilitation center 3 (15) 0.25


Call family number 9 (45) 1.75

aMean total: mean number of times across the participants in the intervention group over the whole study course.