Table 4

 Radiographic abnormality versus normal for age <16 years

Full extensionFull flexionFull proEqual ROM
NPV, negetive predictive value; PPV, positive predictive value; ROM, range of movement.
Sensitivity0.408 (0.304, 0.520)0.513 (0.403, 0.622)0.500 (0.390, 0.610)0.158 (0.093, 0.256)
Specificity0.902 (0.802, 0.954)0.836 (0.724, 0.908)0.787 (0.669, 0.871)1.000 (0.941. 1.000)
PPV0.838 (0.689, 0.923)0.796 (0.664, 0.885)0.745 (0.611, 0.845)1.000 (0.757, 1.000)
NPV0.550 (0.452, 0.644)0.580 (0.475, 0.677)0.558 (0.453, 0.658)0.488 (0.402, 0.575)