Table 1.

Positive association of GWI with anthrax vaccine. p-values are 2-sided. See text for details.

		Anthrax Vaccination
GWI		No	Yes	Total
	Absent	24	45	69
	Present	5	37	42
	Total	29	82	111
	% GWI	17.2%	45.1%
	Statistics
	Pearson χ2 = 7.080, p = 0.008
	Likelihood ratio = 6.788, p = 0.006
	Fisher’s exact test p = 0.008
	φ = 0.353, p = 0.008
	Common odds ratio = 3.947
	Relative risk = 2.617
	Absolute risk increase = 27.9%