Most accurate combined predictors of clinical diagnosis in rheumatoid arthritis and spondylarthropathy
| Sensitivity | Specificity | |
|---|---|---|
| Rheumatoid arthritis | ||
| Self report of diagnosis + hand and wrist x rays performed | 0.95 | 0.92 |
| Self report of diagnosis | 0.99 | 0.87 |
| Self report of diagnosis + morning joint stiffness | 0.91 | 0.90 |
| Self report of diagnosis + rheumatoid factor test performed | 0.99 | 0.75 |
| Rheumatoid factor test performed | 0.62 | 0.90 |
| Hand and wrist x rays performed | 0.86 | 0.60 |
| Morning joint stiffness | 0.83 | 0.48 |
| Pain on waking | 0.72 | 0.45 |
| Spondyloarthropathy | ||
| Self report of diagnosis | 0.85 | 0.96 |
| Self report of diagnosis + family history of spondylitis | 0.81 | 0.91 |
| Self report of diagnosis + family history of reactive arthritis | 0.77 | 0.93 |
| Self report of diagnosis + rheumatoid factor test performed | 0.79 | 0.90 |
| Self report of diagnosis + neck, back, or low back pain | 0.71 | 0.98 |