Table 3 Feasibility and engagement data

Participation rate, n (%)

Non-use attrition (T₁), n (%)

3 (14.3)

    All participants

50 (78.1)

Intervention dropout (< 5 lessons), n (%)

3 (14.3)

    Referred participants

22 (81.0)

Usage at T₁ ,Yes, n (%) ^#

7 (38.9)

    Volunteers

28 (76.0)

Weeks until discontinuation, Mdn (IQR) ^*

2 (5)

Non-eligibility rate, n (%)

7 (14.0)

Logins into iSupport (T₀-T₁), Mdn (IQR) ^#

6 (11.3)

Study dropout at T₁, n (%)

Lessons visited, Mdn (IQR) ^#

13 (16.5)

    All participants

7 (16.7)

Average attendance rate, M (SD) ^#

53.7 (34.4)

    Intervention arm

6 (28.6)

Visits per module, n (%) ^#

    Control arm

1 (4.8)

    Module 1

16 (88.9)

Study dropout at T₂, n (%)

    Module 2

15 (83.3)

    All participants

4 (9.5)

    Module 3

13 (72.2)

    Intervention arm

4 (19.0)

    Module 4

14 (77.8)

    Control arm

0

    Module 5

11 (61.1)

Retention rate (from T₀ to T₂), n (%)

Mood rating function

    All participants

31 (73.8)

    Used, Yes, n (%) ^#

17 (94.4)

    Intervention arm

11 (52.4)

    Visits, Mdn (IQR) ^#

1 (.3)

    Control arm

20 (95.2)

Printout function, Used, n (%) ^#

17 (94.4)