Lactate responses to exercise in enterovirus positive and negative CFS cases (PCR data from tissue controls for comparison)
| No of SATET+ CFS cases | No of SATET− CFS cases | Tissue 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. | |||
| PCR+ | 9 | 1 | 0 |
| PCR− | 19 | 19 | 29 |