Table 1.

Comparison analysis of the clinical characteristics between AIS patients with positive and negative methylation of PITX1 promoter

Parameters		Methylation		P value	χ2 value
		Positive	Negative
Age (y)	10–13	14	8	0.021*	6.148
	14–16	8	20
Sex	Female	19	27	0.308	1.696
	Male	3	1
Cobb angle of main curve (°)	≤30	2	18	0.0001*	15.639
	>30	20	10

^*P < 0.05