Table 2.

The comparison of baseline characteristics between Chinese Han children with tetralogy of Fallot (TOF patients) and normal Chinese Han children (healthy controls).

Clinical characteristics	TOF patients (n=160)	Healthy controls (n=240)	P value
Age	4.27±1.93	5.68±2.17	<0.0001a
BMI	16.03±3.36	16.28±2.63	0.406a
Gender (male/female)	103/57	148/92	0.583b
Family history of TOF	38/122(23.8%)	23/217(9.6%)	0.0001b

TOF – tetralogy of Fallot; BMI – body mass index;

^ap value of student’s t test;

^bchi-square test.