Correlation of PSQI and ESS with DAS28-ESR, HAQ-DI, and FFS during tocilizumab treatment. Correlations by Pearson’s coefficient (r) between the individual changes in scores of Pittsburgh Sleep Quality Index (PSQI) and of Epworth Sleepiness Scale (ESS) with the corresponding changes of DAS28-ESR, Health Assessment Questionnaire Disability Index (HAQ-DI), and FACIT-Fatigue Scale (FFS), in 15 tocilizumab-treated patients with rheumatoid arthritis from baseline through 6 months.
| DAS28 | HAQ-DI | FFS | |
|---|---|---|---|
| PSQI | r = 0.37, p = 0.17 | r = 0.6, p = 0.02 | r = −0.46, p = 0.08 |
| ESS | r = −0.01, p = 0.96 | r = −0.05, p = 0.86 | r = −0.36, p = 0.2 |
DAS28-ESR: 28-joint Disability Activity Score-erythrocyte sedimentation rate; FACIT: Functional Assessment of Chronic Illness Therapy.