Research Article

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 resultsVAPAHCSUICCCTotal ( )

Repeat positive result11333825476

Total ( )18661363862

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.