Table 2.
The diagnostic value of morning stiffness (different durations) in arthralgia for the presence of arthritis
| OR (95% CI) adjusted for age and gender | Sensitivity | Specificity | PPV | NPV | |
|---|---|---|---|---|---|
| Leiden EARC | |||||
| ≥30 minutes | 1.24 (0.89-1.73) | 31.9% | 72.1% | 49.5% | 55.2% |
| ≥60 minutes | 1.49 (1.001-2.20) | 21.2% | 84.2% | 53.5% | 55.5% |
| ≥90 minutes | 1.98 (1.18-3.30) | 13.5% | 92.9% | 62.0% | 55.6% |
| Groningen EARC | |||||
| ≥30 minutes | 1.63 (1.07-2.47) | 40.3% | 70.0% | 62.3% | 48.7% |
| ≥60 minutes | 2.21 (1.33-3.69) | 27.0% | 85.3% | 69.3% | 48.6% |
| ≥90 minutes | 2.16 (1.14-4.10) | 16.8% | 91.8% | 71.7% | 47.2% |
| REACH | |||||
| ≥30 minutes | 1.07 (0.69-1.65) | 54.4% | 48.2% | 53.0% | 50.3% |
| ≥60 minutes | 1.55 (0.97-2.47) | 37.8% | 72.6% | 59.7% | 47.9% |
| ≥90 minutes | 2.05 (1.18-3.58) | 26.7% | 85.1% | 65.8% | 48.0% |
OR, odds ratio; CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value; EARC, Early Arthritis Recognition Clinic; REACH, Rotterdam Early Arthritis Cohort.