Table 1. Sensitivity and specificity of various inflammatory back pain criteria for the diagnosis of ankylosing spondylitis (AS) or non-radiographic axial spondyloarthritis (nr-axSpA) for different investigators/patient
| Diagnosing rheumatologist | Blinded rheumatologist | Patient | |
|---|---|---|---|
| % | % | % | |
| Sensitivity /AS | |||
| Berlin 2 out of 4 | 85.2 | 81.8 | 87.4 |
| Calin | 87.5 | 79.6 | 73.6 |
| ASAS | 89.8 | 75.0 | 79.3 |
| Sensitivity/nr-axial SpA | |||
| Berlin 2 out of 4 | 82.6 | 80.4 | 85.6 |
| Calin | 85.6 | 79.4 | 76.7 |
| ASAS | 78.3 | 73.9 | 68.9 |
| Specificity | |||
| Berlin 2 out of 4 | 44.9 | 32.4 | 18.6 |
| Calin | 26.7 | 24.9 | 20.4 |
| ASAS | 35.6 | 39.6 | 31.2 |