Fatigue as measured by the MFI, as well as BMI and CRP, were similar between all three groups (p > 0.05), but quality of life as measured by the SF36 was better in PR3-AAV-CFS patients than in FM controls (p = 0.02) (Table 5, Fig. 1). Here, CRP is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.