| Hazard ratio (95% CI) | P-value |
---|---|---|
Age | 0.96 (0.88, 1.04) | 0.33 |
Sex (female vs male) | 0.91 (0.68, 1.23) | 0.55 |
Fatigue (Chalder) Score* | 1.15 (1.03, 1.29) | 0.01 |
Disability (SF-36)* | 0.98 (0.87, 1.12) | 0.79 |
Anxiety (HADS)* | 0.97 (0.90, 1.05) | 0.45 |
Depression (HADS)* | 1.00 (0.92, 1.09) | 0.94 |
Number of symptoms | 0.94 (0.88, 1.01) | 0.08 |
Severity of illness | Â | 0.62 (Ptrend) |
   Mild | 1.00 (reference) |  |
   Moderate | 1.04 (0.74, 1.45) | 0.82 |
   Severe | 1.11 (0.73, 1.67) | 0.62 |