Table 1.
Study population characteristics. a PCS, physical component score; MCS, mental component score.
| ME/CFS | Controls | Mann–Whitney U-Test | |
|---|---|---|---|
| Age | 46.1 ± 10.5 | 42.1 ± 14.2 | p = 0.11 |
| Gender | |||
| Female | 47 | 29 | NA |
| Male | 12 | 15 | NA |
| BMI (kg/m2) | 26.5 ± 5.7 | 27.5 ± 5.0 | p = 0.30 |
| Ethnicity | |||
| Hispanic or Latino | 9 | 6 | NA |
| Not Hispanic or Latino | 46 | 37 | NA |
| Unknown | 4 | 1 | NA |
| Race | |||
| American Indian or Alaska Native | 0 | 1 | NA |
| Asian | 2 | 5 | NA |
| Black or African American | 0 | 3 | NA |
| Native Hawaiian or other Pacific Islander | 1 | 0 | NA |
| White | 51 | 32 | NA |
| Unknown | 5 | 3 | NA |
| Onset of disease | |||
| Gradual | 44% | NA | NA |
| Sudden | 56% | NA | NA |
| Illness Duration (years) | 12.1 ± 9.6 | NA | NA |
| Bell Score | 34.6 ± 12.2 | 95.5 ± 8.5 | p < 0.001 |
| SF-36 | |||
| Physical function | 38.6 ± 19.3 | 94.2 ± 9.3 | p < 0.001 |
| Role physical | 16.1 ± 18.8 | 98.3 ± 4.5 | p < 0.001 |
| Pain | 41.9 ± 22.0 | 83.9 ± 16.7 | p < 0.001 |
| General health | 22.9 ± 11.6 | 81.2 ± 13.9 | p < 0.001 |
| Vitality | 17.6 ± 14.0 | 70.3 ± 17.8 | p < 0.001 |
| PCS a | 27.2 ± 7.2 | 56.1 ± 4.7 | p < 0.001 |
| Social function | 26.3 ± 20.7 | 97.7 ± 11.5 | p < 0.001 |
| Role emotional | 81.5 ± 24.8 | 97.0 ± 7.9 | p < 0.001 |
| Mental health | 66.4 ± 18.8 | 83.9 ± 10.1 | p < 0.001 |
| MCS a | 45.1 ± 9.5 | 55.3 ± 5.1 | p < 0.001 |