Table 3.
Latent class analysis versus reference standard calculations using data from Cohort 2 (MRI versus bone scintigraphy versus clinical tests)
| Diagnostic test | Latent class analysis | Calculations using reference standard | ||
|---|---|---|---|---|
| Sensitivity (95% PI) | Specificity (95% PI) | Sensitivity (95% CI) | Specificity (95% CI) | |
| Snuffbox swelling | 0.63 (0.45–0.80) | 0.41 (0.31–0.54) | 0.42 (0.20–0.66) | 0.76 (0.72–0.80) |
| Hematoma | 0.36 (0.18–0.54) | 0.71 (0.61–0.80) | 0.92 (0.68–0.99) | 0.32 (0.27–0.33) |
| Flexion loss less than 25% | 0.63 (0.46–0.82) | 0.33 (0.22–0.43) | 1.00 (0.78–1.0) | 0.29 (0.25–0.29) |
| Extension loss less than 25% | 0.72 (0.56–0.87) | 0.27 (0.20–0.38) | 1.00 (0.79–1.0) | 0.23 (0.19–0.23) |
| Grip strength loss less than 25% | 0.73 (0.52–0.89) | 0.14 (0.07–0.22) | 1.00 (0.83–1.0) | 0.08 (0.05–0.08) |
| Pronation strength loss less than 25% | 0.70 (0.53–0.87) | 0.15 (0.10–0.25) | 1.00 (0.82–1.0) | 0.09 (0.06–0.09) |
| Supination strength loss less than 25% | 0.65 (0.38–0.81) | 0.15 (0.09–0.23) | 1.00 (0.85–1.0) | 0.06 (0.03–0.06) |
| MRI | 0.84 (0.65–0.96) | 0.99 (0.96–1.0) | 0.75 (0.57–0.75) | 1.00 (0.97–1.0) |
| Bone scan | 0.94 (0.80–0.99) | 0.89 (0.79–0.95) | 1.00 (0.80–1.0) | 0.89 (0.86–0.89) |
| Reference standard | 0.86 (0.56–0.97) | 0.97 (0.91–0.99) | ||
| Prevalence (%) | 15.8 | 15.4 | ||
PI = probability interval; CI = confidence interval.