Table 3.

Quality of description of intervention strategies based on the TIDieR checklist

Study	TIDieR items												TIDieR scorea
	1.Brief name of intervention	2.Intervention rationale	3.Description of materials	4.Description of procedures	5.Intervention provider	6.Mode of delivery	7.Location	8.Frequency/ timing, dose, duration, item	9.Tailoring	10.Modifications	11.Plans to assess adherence/ fidelity	12.Actual assessment of fidelity/adherence
Barrow61	✓	✓			✓								3
Frey62	✓	✓	✓	✓	✓	✓	✓	✓	✓				9
Donenberg38	✓	✓	✓	✓	✓	✓		✓					7
Tone39	✓	✓	✓	✓	✓	✓	✓	✓					8
O’Neil63	✓	✓	✓	✓	✓	✓		✓		✓			8
Dilzell32	✓	✓	✓		✓			✓					5
Furniss41	✓	✓	✓	✓	✓	✓	✓	✓	✓				9
Courtney21	✓	✓	✓	✓	✓		✓	✓					7
Chen64	✓	✓	✓	✓	✓	✓	✓	✓		✓	✓	✓	11
Katz33	✓	✓	✓	✓	✓	✓	✓	✓					8
Goodman65	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓			10
Li18	✓	✓		✓	✓			✓	✓				6
Schmidlen24	✓	✓	✓	✓	✓	✓		✓	✓		✓	✓	10
Garcia34	✓	✓	✓	✓				✓					5
Aeilts66	✓	✓	✓	✓	✓	✓		✓					7
Kahn67	✓	✓	✓	✓	✓	✓		✓					7
Caswell-Jin23	✓		✓	✓	✓	✓		✓					6
Patenaude68	✓	✓								✓			3
Yoon56	✓	✓	✓	✓	✓	✓		✓	✓				8
Haas69	✓	✓	✓		✓	✓							6
Frey70	✓	✓	✓	✓	✓	✓	✓	✓	✓				9
Delahunty71	✓	✓	✓	✓	✓	✓	✓	✓	✓				9
Pande72	✓	✓	✓	✓	✓	✓	✓			✓			8
Sermijn40	✓	✓	✓	✓	✓	✓	✓	✓					8
Menko73	✓	✓	✓	✓		✓		✓					6
Kassem74	✓	✓		✓	✓	✓		✓					6
Kauffman75	✓	✓	✓	✓	✓	✓	✓	✓					8
No. of studies with adequate description	27	26	23	23	24	21	12	23	9	5	2	2
Percentage of studies with adequate description/ %	100	96.3	85.2	85.2	88.9	77.8	44.4	85.2	33.3	18.5	7.4	7.4

^aWe allocated one point for each item of the TIDieR checklist to indicate completeness of the descriptions of strategies.