Table 2.
Means, standard deviations, and ceiling effects for subscales among the ME/CFS and control samples
| Measure | ME/CFS patients (n = 240) | Controls (n = 88) | Number (%) of ME/CFS patients at ceiling | Number (%) of controls at ceiling |
|---|---|---|---|---|
| Multidimensional Fatigue Inventory-20 | ||||
| General fatigue | 17.83 (2.81) | 8.42 (3.23) | 95 (40) | 0 (0) |
| Physical fatigue | 17.44 (3.10) | 6.67 (2.73) | 90 (38) | 0 (0) |
| Mental fatigue | 14.16 (3.59) | 8.02 (3.62) | 17 (7) | 0 (0) |
| Reduced activity | 15.97 (3.57) | 6.64 (3.06) | 48 (20) | 1 (1) |
| Reduced motivation | 12.25 (3.82) | 6.65 (3.13) | 3 (1) | 1 (1) |
| RAND SF-36 | ||||
| Physical functioning | 63.41 (23.59) | 5.23 (9.62) | 14 (6) | 0 (0) |
| Role limitations due to physical health | 94.90 (16.73) | 5.23 (17.20) | 214 (89) | 1 (1) |
| Role limitations due to emotional problems | 29.55 (41.76) | 6.98 (17.80) | 51 (21) | 1 (1) |
| Energy/fatigue | 82.99 (16.94) | 30.30 (15.60) | 54 (23) | 0 (0) |
| Emotional well-being | 30.83 (19.47) | 19.16 (11.61) | 0 (0) | 0 (0) |
| Social functioning | 71.35 (25.00) | 6.47 (12.33) | 54 (23) | 0 (0) |
| Pain | 57.40 (28.50) | 11.63 (14.19) | 33 (14) | 0 (0) |
| General Health | 75.18 (17.98) | 17.42 (14.95) | 22 (9) | 0 (0) |
| DePaul Symptom Questionnaire | ||||
| Autonomic/neuroendocrine/immune | 60.87 (31.35) | 11.83 (10.66) | 0 (0) | 0 (0) |
| Cognitive | 37.71 (15.99) | 6.23 (7.14) | 3 (1) | 0 (0) |
| Post-exertional malaise | 45.06 (12.55) | 6.05 (7.26) | 7 (3) | 0 (0) |
| Sleep | 12.53 (6.11) | 5.39 (4.81) | 11 (5) | 0 (0) |
Note. All ANOVA comparisons of group means were significant at p < .001.