Table 5. ALDH2 haplotype frequencies and the association with drug addiction risk.

Block ID	Haplotype	Freq(case)	Freq(control)	χ2	Pearson's p	OR	95% CI		p-adj
1	ATCGA	0.095	0.091	0.128	0.7201	0.999	0.756	1.320	0.996
	GTCAC	0.190	0.129	19.65	< 0.001*	1.668	1.328	2.094	< 0.001*
	GCAGC	0.278	0.283	0.101	0.7511	1.003	0.836	1.202	0.977
	ATCGC	0.024	0.049	12.76	< 0.001*	0.444	0.281	0.704	< 0.001*
	GTCGC	0.414	0.445	2.726	0.0987	0.859	0.731	1.009	0.065

OR: odd ratio; CI: confidence interval.

p-adj: p-value was adjusted by sex and age;

^*p value ≤ 0.05; Bonferroni's multiple adjustment was applied, with p<0.00125.