Association of premature birth and maternal education level on attention deficit hyperactivity disorder in children: A meta-analysis

Table 6 Summary of meta-regression

Condition	t	P value	OR	95%CI
Merge	0.45	0.686	0.78	-4.81 to 6.38
Quality	0.21	0.894	0.04	-0.58 to 0.66
China	3.10	0.053	3.16	-6.40 to 0.09
Age1	2.33	0.102	2.60	-0.96 to 6.17
Multicenter	0.17	0.876	0.09	-1.56 to 1.74

¹The groups were divided by age: Children aged 10 were included in the control group, while the intervention group consisted of samples with ages above 10.

OR: Odds ratio; CI: Confidence interval.