Table 1

Lactate responses to exercise in enterovirus positive and negative CFS cases (PCR data from tissue controls for comparison)

No of SATET+ CFS casesNo of SATET− CFS casesTissue controls
10/48 CFS cases were PCR positive v 0/29 tissue controls (p=0.01).
9/28 SATET+ CFS cases were PCR positive compared with 1/20 SATET− (OR 9.0, 95% CI 1.04 to 78.17).
CFS, chronic fatigue syndrome; PCR, polymerase chain reaction; SATET, subanaerobic threshold exercise test; +, positive; −, negative.