3. Descriptive summaries: intervention characteristics, by intervention class.

Intervention Details	Behavioural (BEH), (median, IQR)	Educational (EDU), (median, IQR)	Supportive (SUP), (median, IQR)	Mixed (MIX), (median, IQR)
Study duration (weeks)	12 (12‐52)	12 (6‐26)	12 (12‐16)	14 (12‐52)
Intervention duration (weeks)	4 (2‐12)	0 (0‐4.5)*	12 (9‐13)	12 (10‐25)
# of Intervention episodes	3 (3‐14)	2 (1‐6)	NR (MOST)	7 (5‐10)
Contact time (minutes)	90 (80‐240)	21 (11‐105)	NR	75 (33‐143)

* Educational interventions that took place in a single participant interaction (e.g., dispensing written material, single presentation) were assigned a duration of '0' weeks.

Abbreviations: IQR: interquartile range; NR: not reported; NR (MOST): most studies did not report.