Table 3.

The AUC of NLR, MLR, platelets, and FRI risk predictor for the diagnosis of tibia FRI.

Variable	AUC (95% CI)	SEM	P value	Youden index	Cut-off value	Sensitivity	Specificity
NLR	0.299 (0.244-0.355)	0.028	< 0.001	0	—	—	—
MLR	0.417 (0.355-0.478)	0.031	0.009	0.015	0.132	94.7%	6.8%
Platelets	0.684 (0.627-0.741)	0.029	< 0.001	0.317	262.500	58.2%	73.5%
FRI risk predictor	0.955 (0.935-0.976)	0.011	< 0.001	0.813	0.554	91.2%	90.1%

AUC: area under the curve; SEM: standard error of mean; NLR: neutrophil–lymphocyte ratio; MLR: monocyte–lymphocyte ratio; FRI risk predictor: e^logit(P)/(1 + e^logit(P)).