Table 2

Subgroup analyses for studies reporting screen time outcomes

	Number of studies	Mean difference (min/day)	95% CIs				Heterogeneity within subgroups
Subgroup	Number of studies	Mean difference (min/day)	Lower	Upper	Z	p Value	χ²	I² (%)	p Value
Duration of intervention
Short (<6 months)	11	−15.45	−32.63	1.73	1.76	0.08	93.36	89	<0.00001
Long (≥6 months)	6	−16.14	−23.33	−8.94	4.39	<0.0001	6.34	21	<0.0001
Behaviours targeted
Targeted SB alone	4	−34.24	−53.53	−14.95	3.48	0.0005	7.44	60	0.06
Targeted SB, PA and diet	13	−12.19	−17.72	−6.65	4.31	<0.0001	14.38	17	0.28
Child age
<3 years	4	−13.17	−20.70	−5.64	3.43	0.0006	3.21	6	0.36
≥3 years	13	−18.20	−32.54	−3.87	2.49	0.01	100.65	88	<0.00001
Setting
Preschool/childcare	7	−11.97	−21.41	−2.54	2.49	0.01	7.69	22	0.26
Home	4	−30.55	−54.80	−6.31	2.47	0.01	12.86	77	0.005
Community-based (eg, community venues)	3	−16.03	−23.93	−8.12	3.97	<0.0001	1.10	0	0.58
Healthcare centre/paediatric office	3	−9.91	−23.88	4.05	1.39	0.16	3.52	43	0.17