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Table 1 Clinical characteristics of subjects surveyed

From: Mitochondrial DNA variants correlate with symptoms in myalgic encephalomyelitis/chronic fatigue syndrome

Age Healthy controls Patients
Number Proportion females Number Proportion females Acute onset Duration of illness (>3 years)
21–30 25 0.6 23 0.57 14 (61 %) 11 (48 %)
31–40 22 0.48 20 0.65 14 (70 %) 15 (75 %)
41–50 34 0.71 40 0.75 32 (80 %) 27 (68 %)
51–60 71 0.76 59 0.63 51 (86 %) 45 (76 %)
61–75 44 0.7 51 0.8 43 (84 %) 47 (92 %)