2x2 Contingency table and 4-point risk score contingency table for select indices.

Tabulates the percentage of CPD and VD that scored in the range indicated. For example, 68% of the CPD cases had height ≦156.1 cm and 27% of VD had height in the range greater 156.1 cm and less than 160.3 cm. The 2x2 contingency table for the Kinect risk score shows that 84% of the CPD cases and 87% of the VD can be deected with a FNR of 13% and a FPR of 16%. The 4-point scale for the Kinect risk score shows that 78% of the CPD cases were scored as very high risk with a FPR ≤10% and 74% of the VD were scored at mild risk with a FNR ≤10%. Note: CPD = cephalopelvic disproportion, VD = vaginal delivery, FPI = fetal pelvic index, LRCPD = CPD likelihood ratio = TPR/FPR within the range of risk values of interest, TPR = true positive rate, FPR = false positive rate, LRVD = vaginal delivery likelihood ratio = TNR/FNR within the range of risk values of interest, TNR = true negative rate, and FNR = false negative rate. Green shaded areas denote ‘true’ predictions (i.e., TPR or TNR) and the orange shaded areas denote ‘false’ predictions (i.e., FPR or FNR).