Table 4.

Analysis of association between maternal age at pregnancy and MAO variants of male ADHD probands

Genes	Variants	Alleles	≤ 26 yrs	> 26 yrs	Chi-square (p-value)	Relative risk (95% confidence interval)
MAOA	30 bp-uVNTR	3R	0.76	0.61	4.03 (0.05)	1.26 (1.01 – 1.57)
		4R	0.24	0.39
	rs5906883	A	0.73	0.61	2.66 (0.10)	–
		C	0.27	0.39
	rs1465107	G	0.25	0.36	2.3 (0.13)	–
		A	0.75	0.64
	rs1465108	A	0.75	0.64	2.3 (0.13)	–
		G	0.25	0.36
	rs5905809	C	0.28	0.39	2.09 (0.15)	–
		G	0.72	0.61
	rs5906957	A	0.72	0.61	2.09 (0.15)	–
		G	0.28	0.39
	rs6323	T	0.15	0.33	7.22 (0.007)	1.27 (1.06 – 1.52)
		G	0.85	0.67
	rs1137070	C	0.25	0.40	3.87 (0.05)	1.23 (1.00 – 1.54)
		T	0.75	0.60
MAOB	rs4824562	A	0.83	0.81	0.06 (0.81)	–
		G	0.17	0.19
	rs56220155	G	0.33	0.20	3.66 (0.06)	1.19 (1.00 – 1.44)
		A	0.67	0.80
	rs2283728	T	0.23	0.16	0.98 (0.32)	–
		C	0.77	0.84
	rs2283727	C	0.77	0.84	0.98 (0.32)	–
		A	0.23	0.16
	rs3027441	C	0.25	0.15	2.51 (0.11)	–
		T	0.75	0.85
	rs6324	C	0.75	0.85	2.51 (0.11)	–
		T	0.25	0.15
	rs3027440	T	0.83	0.86	0.31 (0.58)	–
		C	0.17	0.14

Statistically significant differences are presented in bold