Pearson correlations between PATGL and DOCGL and the three composite indices (BASDAI, ASDAS-CRP and RAPID3-like index) including a version of RAPID3 not including PATGL, as well as the individual components to evaluate criterion validity
| Index and individual components | PATGL | DOCGL |
|---|---|---|
| BASDAI 1: Fatigue | 0.65 | 0.39 |
| BASDAI 2: Back Pain | 0.74 | 0.54 |
| BASDAI 3: Pain/swelling peripheral joints | 0.42 | 0.42 |
| BASDAI 4: Enthesitis | 0.56 | 0.51 |
| BASDAI 5: Severity of MS | 0.63 | 0.54 |
| BASDAI 6: Duration of MS | 0.44 | 0.41 |
| PATGL (0–10) | – | 0.58 |
| Physical function (0–10) | 0.50 | 0.45 |
| Pain global (0–10) | 0.76 | 0.57 |
| CRP (mg/L) | 0.17 | 0.28 |
| BASDAI (0–10) | 0.76 | 0.62 |
| ASDAS-CRP (0—not defined upper end) | 0.70 | 0.61 |
| RAPID3-like (0–30) | 0.90 | 0.62 |
| RAPID3-like without PATGL | 0.72 | 0.56 |
PATGL and DOCGL are considered the ‘gold standard’ measures, representing patient and physician perspectives for disease activity.
ASDAS, Ankylosing Spondylitis Disease Activity Score; BASDAI, The Bath Ankylosing Spondylitis Disease Activity Index; CRP, C-reactive protein; PATGL, patient global assessment; RAPID3-like, routine assessment of patient index data-like.