Percent of patients with ME/CFS and controls with/without a family history of ME/CFS
| Family history status | ME/CFS(n = 400) | Controls(n = 414) | Total | Significance level |
|---|---|---|---|---|
| % (n) | % (n) | |||
| Family history | 18.0 (72) | 3.9 (16) | 88 | < 0.05 |
| No family history | 82.0 (328) | 96.1 (398) | 726 |