Table 3 Concurrent validity with 95 % confidence intervals (CI) of clinical spinal assessment and scoliometer measurement versus radiographic Cobb angle
Clinical assessment vs Cobb | Scoliometer vs Cobb | |||||
|---|---|---|---|---|---|---|
95 % CI | 95 % CI | |||||
Sensitivity | 75 % | 19.4 % | 99.4 % | 50 % | 6.8 % | 93.2 % |
Specificity | 95.8 % | 78.9 % | 99.9 % | 95.8 % | 73 % | 99 % |
ROC area | 0.85 | 0.61 | 1 | 0.71 | 0.42 | 0.99 |
Likelihood ratio (+) | 18 | 2.4 | 133 | 6 | 1.2 | 31.2 |
Likelihood ratio (−) | 0.3 | 0.1 | 1.4 | 0.5 | 0.2 | 1.5 |
Positive predictive value | 75 % | 19.4 % | 99.4 % | 50 % | 6.8 % | 93.2 % |
Negative predictive value | 95.8 % | 78.9 % | 99.9 % | 91.7 % | 73 % | 99 % |