Supplemental Digital Content 3
Table S1. QuantiFERON-TB Gold In-Tube results according to the study group defined by
tuberculin skin testing results shown in Table 1, Supplemental Digital Content.
Group of patients QFN-G-IT results
Positive Negative
No LTBI 0 26
BCG reactors 0 6
LTBI 5 10
Probable active TB 0 2
Previous active TB 1 1
Definitions: No LTBI: Children with TST <5mm; BCG-reactors: BCG-vaccinated children with TST between 5 and 10mm; LTBI: children non-BCG-vaccinated children with TST≥5mm and BCG-vaccinated children with TST ≥10mm; Probable active TB: children with absence of culture confirmation but with abnormal radiography consistent with active TB; Previous active TB:
children with active TB diagnosed in the past, whom active TB chemotherapy was administrated
TST: Tuberculin skin testing; QFN-G-IT: QuantiFERON-TB Gold In Tube; LTBI: Latent
Tuberculosis infection; TB: Tuberculosis; BCG: Mycobacterium bovis bacillus Calmette-Guérin
