Table 3.

Fisher’s exact analysis excluding African American children

	Total cohort			Males only			Females only
Age cut-off	Relative risk	95% CI	p-value	Relative risk	95% CI	p-value	Relative risk	95% CI	p-value
18 months	1.06	0.81-1.38	0.668	1.17	0.87-1.58	0.309	0.734	0.41-1.31	0.292
24 months	1.06	0.75-1.50	0.745	1.10	0.74-1.62	0.642	0.910	0.41-2.00	0.814
36 months	1.13	0.72-1.78	0.588	1.19	0.72-1.97	0.490	0.835	0.28-2.48	0.745