Table 3.

Interferon-γ values in mIU/mL in the different study groups.

Study groups	n	Mean	SD	Median	Min	Max
Negative controls	26	49.1	108.3	0	0	423.9
Vaccinated HCWs	94
Positive IGRA at calculated cutoff	82	998.8	758.5	808.8	164.5	2499
Negative IGRA at calculated cutoff	12	43.5	43.1	31.5	0	114.2
KTRs	48
Positive IGRA at calculated cutoff	12	697,6	713.2	316.1	176.9	2499.5
Negative IGRA at calculated cutoff	36	21.6	27.7	9.7	0	84.1

Calculated cutoff: 147 mIU/mL.