Table 1. Descriptive data and t-test for case patients (N=103) and control subjects (N=63).

	Case patients			Control subjects
	Male (N=51)	Female (N=52)	p	Male (N=34)	Female (N=29)	p
Age (months)	17.27±3	18.12±3	0.188	17.62±3	18.03±3	0.629
Birth weight (g)	3172±608	3276±632	0.397	3205±492	3203±444	0.986
Week of birth	38.80±2	39.00±1	0.523	39.25±1	38.67±1	0.127