Table 2. Expected and identified frequency of patients with IDO2 Variant Alleles.

		Recessive Logistic Model		Number (and %) of homozygous minor allele
IDO2 Variant	Predicted Minor allele frequency	Estimate coefficient	P-value	Race	Non-IBD (177)	CD (686)
rs4503083 (T to A)	10.9%–50.0%	−1.295	0.025	White	66/142 (46.5%)	399/614 (35.0%)
Y359stop				Black	6/34 (17.6%)	13/63 (20.6%)
				Other	0/1 (0%)	7/9 (77.8%)
rs4736794 (A to G)	6.7%–50.0%	−0.498	0.698	White	29/142 (46.5%)	399/614 (35.0%)
				Black	2/34 (5.9%)	13/63 (3.2%)
				Other	0/1 (0%)	6/9 (66.7%)
rs10109853 (C to T)	18.2%–100%	−0.072	0.786	White	97/142 (68.3%)	473/614 (77.0%)
				Black	20/34 (58.8%)	35/63 (55.6%)
				Other	1/1 (100%)	7/9 (77.8%)
rs35212142(T to A)	5.6%–50.0%	12.923	0.981	White	8/142 (5.6%)	28/614 (4.6%)
				Black	2/34 (5.9%)	0/63 (0%)
				Other	0/1 (0%)	0/9 (0%)