TABLE 4.

Receiver operating characteristic (ROC) curve for predicting GN‐BSI

Parameters	AUC	95% CI	p value	Cut‐off	Sensitivity	Specificity
MPV	0.62	0.56–0.68	<0.001	10.15	0.68	0.52
PCT	0.72	0.67–0.77	<0.001	3.70	0.58	0.75
PWRa	0.63	0.57–0.68	<0.001	10.89	0.82	0.40
PLT/PCTa	0.73	0.67–0.77	<0.001	28.87	0.80	0.55
MPV/PCTa	0.72	0.66–0.77	<0.001	2.17	0.78	0.54
Model	0.79	0.73–0.85	<0.001	0.55	0.75	0.71

Abbreviations: GN‐BSI, gram‐negative bloodstream infections; MPV, mean platelet volume; PCT, procalcitonin; PWR, platelet count‐to‐white blood cell count ratio.

^a Represents a positive prediction when the parameters are less than or equal to the cut‐off value.