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Table 3 Subgroup analysis of ME/CFS patients with and without fibromyalgia

From: Physical activity measures in patients with myalgic encephalomyelitis/chronic fatigue syndrome: correlations between peak oxygen consumption, the physical functioning scale of the SF-36 questionnaire, and the number of steps from an activity meter

  Fibromyalgia + Fibromyalgia − P-value
Number/percentage 58 (58%) 41 (41%)  
Number of steps/day (median/IQR) 4527 (3264–6235) 6401 (3531–8123) 0.14
SF-36 Physical activity 42 (19) 52 (22) 0.02
%peak VO2 74 (19) 80 (16) 0.08
  1. All values are mean (SD) unless otherwise noted. For abbreviations see Table 1