Table 1.

The characteristics of included studies.

Study	Sample size		Age	ARDS diagnosis (PaO2/FiO2, mmHg)	Interventions		Time points that the outcomes were measured and compared
	Prone position group	Control group			Prone position group	Control group
Curley et al., 2005	51	51	2–18 years	<200	Prone position >20 h/days	Supine position	1, 2 days after intervention
Dong et al., 2015	33	32	2–10 years	<200	Prone position >10 h/days	Supine position	1, 2, 3,4 days after intervention
Ibrahim and Elmohamady, 2007	11	11	8–10 years	<200	Prone position for 20 h/days	Supine position	1, 2 days after intervention
Liu and Zhang, 2018	31	31	1–2 years	<200	Prone position >4 h/days	Supine position	1, 2, 3, 7 days after intervention
Sawhney et al., 2005	22	21	0–12 years	<200	Prone position >4 h/days	Supine position	3 days after intervention
Sun et al., 2017	36	36	2–10 years	<300	Prone position >6 h/days	Supine position	1, 2, 7 days after intervention
Wu et al., 2015	33	34	0–21 days	<200	Prone position for 20 h/days	Supine position	1, 2, 3, 5 days after intervention