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Table 1 Characteristics of healthy controls, chronic fatigue syndrome (CFS) patients, Q fever fatigue syndrome (QFS) patients, and asymptomatic Q fever seropositive controls

From: A possible role for mitochondrial-derived peptides humanin and MOTS-c in patients with Q fever fatigue syndrome and chronic fatigue syndrome

Characteristics Healthy controls (n = 10) CFS (n = 10) QFS (n = 10) Q fever seropositives (n = 10)
Male sex, number (%) 5 (50) 5 (50) 5 (50) 5 (50)
Age, years Median (IQR) 54 (37–61) 48 (41–52) 43 (40–58) 50 (43–57)
Duration of symptoms, monthsa Median (IQR) 110 (31–253) 78 (62–87)
CIS subscale fatigue severity score, mean ± SD 51 ± 5.1 52 ± 4.1
SIP-8 total score, mean ± SD 1600 ± 735.0 1474 ± 483.7
  1. QFS Q fever fatigue syndrome, CFS chronic fatigue syndrome, IQR interquartile range; CIS Checklist Individual Strength, SD standard deviation, SIP-8 Sickness Impact Profile-8
  2. aSymptom duration: time onset of symptoms until blood sampling