Table 4.

Sensitivity, Specificity, positive predictive value, negative predictive value, positive and negative likelihood ratio for CRBSI (n = 114)

	Prevalence of local sign	Sensitivity	Specificity	PPV	NPV	Positive LR	Negative LR
≥ 1 local sign (n = 1938)	13.3	40.4	86.9	2.4	99.5	3.09	0.69
Redness (n = 1633)	11.2	28.1	88.9	2.0	99.4	2.54	0.81
Pain (n = 59)	0.4	1.7	99.6	3.3	99.2	4.46	0.99
Non-purulent discharge (n = 251)	1.7	6.1	98.3	2.8	99.3	3.64	0.95
Purulent discharge (n = 102)	0.7	11.4	99.4	12.7	99.3	18.55	0.99

PPV, positive predictive value; NPV, negative predictive value; LR likelihood ratio