| |
Length
|
Width
|
Length/Thickness
|
Width/Thickness
|
Age
|
Combinationb
|
|---|
|
Sensitivity
|
0.664
|
0.418
|
0.648
|
0.705
|
0.779
|
0.730
|
|
Specificity
|
0.536
|
0.739
|
0.704
|
0.641
|
0.707
|
0.746
|
|
Accuracy
|
0.559
|
0.681
|
0.694
|
0.653
|
0.748
|
0.741
|
|
DOR
|
2.280
|
2.037
|
4.361
|
4.507
|
8.496
|
7.939
|
|
AUC
|
0.619
|
0.604
|
0.706
|
0.688
|
0.766
|
0.791
|
|
AUC: 95% CI
|
0.559–0.679
|
0.544–0.664
|
0.649–0.763
|
0.633–0.744
|
0.716–0.816
|
0.744–0.837
|
|
P for AUC = 0.5c
|
0.001
|
0.012
|
< 0.001
|
< 0.001
|
< 0.001
|
< 0.001
|
|
P for AUC = Combinationd
|
< 0.001
|
< 0.001
|
0.024
|
0.005
|
0.473
|
n/a
|
- aDFI distance between the fabella and the insertion of the lateral head of the gastrocnemius onto the femur, DOR diagnostic odds ratio, AUC area under curve, CI confidence interval, n/a not applicable. bCombination = Width + Length/Thickness + Age, Logistic regression: Backward. cP value of each AUC tested against 0.5; binomial z test. dP value of each AUC tested against the AUC of combination; binomial z test
