Genetic Polymorphism in the RYR1 C6487T Is Associated with Severity of Hypospadias in Chinese Han Children

Table 1

Demographics of the studied subjects.

	Case group	Control group	X^2/t	P
	(n = 263) (%)	(n = 312) (%)
Premature delivery (case)	64 (24.33)	20 (6.41)	36.75	< 0.001
Ectopic pregnancy	75 (28.52)	26 (8.33)	40.15	< 0.001
Low birth weight (case)	86 (32.70)	39 (12.50)	34.22	< 0.001
Intake of drugs in pregnancy; (case)	43 (16.35)	39 (12.50)	1.73	0.388
Maternal age (age)	27.30 ± 3.48	26.91 ± 5.70	0.988	0.334
Delivery times (case)	1.66 ± 0.70	1.71± 0.51	1.526	0.128