Table 4 Descriptive statistics of EQ-5D-5L utility score and EQ-VAS at baseline and follow-up
From: Responsiveness of the EuroQoL 5-Dimension (EQ-5D) questionnaire in patients with spondyloarthritis
| Â | Mean | Standard deviation | Observed range | Theoretical range | Floor (%) | Ceiling (%) |
|---|---|---|---|---|---|---|
EQ-5D-5L | ||||||
 Baseline | 0.798 | 0.170 | 0.280 to 1.000 | − 0.391 to 1.000 | 0.0 | 6.2 |
 Baselinea | 0.798 | 0.162 | 0.310 to 1.000 | − 0.391 to 1.000 | 0.0 | 5.1 |
 Follow-up | 0.794 | 0.185 | -0.110 to 1.000 | − 0.391 to 1.000 | 0.0 | 13.3 |
 Mean change | -0.004 | 0.114 | -0.390 to 0.410 |  |  |  |
EQ-VAS | ||||||
 Baseline | 64.88 | 17.21 | 10 to 97 | 0 to 100 | 0.0 | 0.0 |
 Baselinea | 65.73 | 16.68 | 15 to 97 | 0 to 100 | 0.0 | 0.0 |
 Follow-up | 64.26 | 18.07 | 5 to 95 | 0 to 100 | 0.0 | 0.0 |
 Mean change | -0.63 | 20.11 | -60 to 50 |  |  |  |