Table A1.

Confusion matrix for linear discriminant analysis of PBMC death rate after 24, 48 and 72 h in culture medium.

Method	Clinical Group	Actual Count	Test Class		% Error	Statistics
			ME/CFS	Control
Linear discriminant analysis	ME/CFS	57	45	12	21.0	χ2	26.2
	Control	33	7	26	21.2	p	3.0 × 10−7
	TOTAL	90	52	38	21.1	Fisher p = 1.25 × 10−7
Logistic regression	ME/CFS	57	47	10	17.5	χ2	27.4
	Control	33	8	25	24.2	p	1.6 × 10−7
	TOTAL	90	65	25	20.0	Fisher p = 7.2 × 10−8