Table V.

Summary statistics for the prediction accuracy of the finite element (FE) model and the experienced clinicians when relying on their experience and when judging whether cortical involvement was larger than 30 mm.¹⁴ 95% confidence intervals are given between brackets

		F, n	NF, n	Sensitivity	Specificity	PPV	NPV
FE model whole group*	F predicted	8	14	0.89 (0.52 to 1.00)	0.63 (0.46 to 0.78)	0.36 (0.26 to 0.48)	0.96 (0.79 to 0.99)
	NF predicted	1	24
FE model split to institute†	F predicted	8	8	0.89 (0.52 to 1.00)	0.79 (0.63 to 0.90)	0.50 (0.34 to 0.66)	0.97 (0.82 to 0.99)
	NF predicted	1	30
Experience
Clinician 1	F predicted	2	2	0.22 (0.03 to 0.60)	0.95 (0.82 to 0.99)	0.50 (0.14 to 0.86)	0.84 (0.78 to 0.88)
	NF predicted	7	36
Clinician 2	F predicted	0	6	0.00 (0.00 to 0.34)	0.84 (0.69 to 0.94)	0.00	0.78 (0.76 to 0.80)
	NF predicted	9	32
Clinician 3	F predicted	3	3	0.33 (0.07 to 0.70)	0.92 (0.79 to 0.98)	0.50 (0.19 to 0.81)	0.85 (0.78 to 0.90)
	NF predicted	6	35
30 mm cortical involvement
Clinician 1	F predicted	2	1	0.22 (0.03 to 0.60)	0.97 (0.86 to 1.00)	0.67 (0.17 to 0.95)	0.84 (0.79 to 0.88)
	NF predicted	7	37
Clinician 2	F predicted	1	6	0.11 (0.00 to 0.48)	0.84 (0.69 to 0.94)	0.14 (0.02 to 0.55)	0.80 (0.75 to 0.84)
	NF predicted	8	32
Clinician 3	F predicted	0	1	0.00 (0.00 to 0.34)	0.97 (0.86 to 1.00)	0.00	0.80 (0.80 to 0.81)
	NF predicted	9	37

^*Without considering inter-scanner differences

^†Prediction of the FE models based on different thresholds for each institute (institute 1: 7.5 × body weight (BW), institute 2: 6.5 × BW, institute 3: 8.0 × BW)

F, fracture group; NF, non-fracture group; PPV, positive predictive value; NPV, negative predictive value