Parameter | Threshold value [°] for proof/exclusion of normal feet | Threshold range [°] | Number of feet classifiable according to threshold value | ||
---|---|---|---|---|---|
100% Sensitivity | 100% Specificity | Normal feet (n = 22) | Flatfeet (n = 22) | ||
Talocalcaneal angle (dorsoplantar-view) | < 12.5 | > 26.5 | 14 | 1 | 6 |
Talonavicular coverage | > − 16 | <− 28.5 | 12,5 | 9 | 18 |
Talo-first-metatarsal-base angle | > − 7.5 | <−17.5 | 10 | 9 | 18 |
Calcaneus-fifth-metatarsal angle | > − 3.5 | <−16.5 | 13 | 9 | 4 |
Talo-first-metatarsal angle (dorsoplantar-view) | > − 1.5 | <−12.5 | 11 | 7 | 12 |
Calcaneal-pitch angle | > 21.5 | < 10.5 | 11 | 9 | 7 |
Costa-Bartani angle | < 124.5 | > 141.5 | 17 | 10 | 11 |
Talo-first-metatarsal angle (lateral-view) | > − 13.5 | <−20 | 6,5 | 12 | 20 |
Talocalcaneal angle (lateral-view) | < 47.5 | > 69.5 | 22 | 2 | 2 |
Talometatarsal index | > − 31 | <−34 | 3 | 20 | 21 |
Talocalcaneal index | < 66 | > 88 | 22 | 7 | 5 |