Table 2.

Subgroups analysis based on birth weight and age at assessment.

	No. of study group	WMD	95% CI	Z test P value	I 2 (%)	Q test P value	Egg’s test P value
birth weight
<1000	20	13.95	11.71–16.20	<0.001	81.7	<0.001	0.739
1000–1499	35	9.85	8.43–11.28	<0.001	70.6	<0.001	0.764
1500–2499	11	6.83	4.76–8.89	<0.001	43.7	0.06	0.382
age
<10	36	10.58	8.87–12.30	<0.001	83.5	<0.001	0.278
10~18	17	9.82	7.88–11.75	<0.001	66.4	<0.001	0.151
≥18	8	11.28	8.42–11.68	<0.001	76.8	<0.001	0.588
social determinants
matched	39	9.90	8.42–11.39	<0.001	76.8	<0.001	0.172
non-matched	22	11.42	9.31–13.53	<0.001	84.4	<0.001	0.409