Delineating a Retesting Zone Using Receiver Operating Characteristic Analysis on Serial QuantiFERON Tuberculosis Test Results in US Healthcare Workers

Table 1

Test results for analyzed HCWs from VA Palo Alto Health Care System (VAPAHCS), University of Illinois Chicago (UIC) and the Cleveland Clinic (CC).

Test results	VAPAHCS	UIC	CC	Total (𝑛)
Repeat positive result	113	338	25	476
Reversion	73	275	38	386
Total (𝑛)	186	613	63	862

Note: HCWs were excluded if their only positive test result was their last test taken or if data for only one test result was available.