Table 1.

Results of two-way table analysis for DRB1*13:02 and GWI.

A. Two-way table
		Group		Total
		Control	GWI
DRB1*13:02	Absent	13	52	65
	Present	8	3	11
Total		21	55	76

B. Analysis of the two-way table
Test	Value	DF	Significance (2-sided)
Pearson Chi-Square	13.08	1	P = 0.0003

C. Mantel-Haenszel common odds ratio estimate
Estimated odds ratio ($\widehat{\omega }$)	ln($\widehat{\omega }$)	SE of ln($\widehat{\omega }$)	Asymptotic significance (2-sided)
0.094 95% lower bound: 0.022 95% upper bound: 0.403	− 2.367	0.745	P = 0.001