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Table 1 Characteristics of children enrolled in the study (n = 99)

From: IGRA tests perform similarly to TST but cause no adverse reactions: pediatric experience in Finland

Characteristic n
Male 63
Age (yrs), median (min-max) 9 (0–18)
BCG vaccinated* 68
BCG non-vaccinated 6
BCG vaccination status unknown 25
Born outside Finland or at least one of the parents is from a country with endemic TB: 57
➢ Somalia (several families) 25
➢ Vietnam 6
➢ Peru (1 family) 4
➢ Russia 4
➢ Kosovo 2
➢ Nigeria 2
➢ Afghanistan, Angola, Azerbadzan, Burma Burundi, Estonia, India, Congo, Sudan, Thailand, Turkey, Uganda 12 (one each)
➢ Siblings who live in Russia 2
HIV infection 2
TST test performed 87
TST not performed 8
Data missing 4
Culture or/and Nucleic acid amplification (NAA) method performed 6
➢ acid fast staining positive 2/6 (also culture pos)
➢ culture positive (M. tuberculosis) 4/6
➢ NAA positive 2/6 (also culture pos)
Radiological examination performed 95
Radiological findings  
➢ normal 81/95 (85%)
➢ pulmonary TB 4
➢ enlargement of the hilus zone (Hodgkin lymphoma, TB lymphadenitis, one mild in LTBI, one mild in salmonelosis) 4 (one each)
➢ interstitial changes (vasculitis) 1
➢ pleural effusion (pleuritis and chylothorax) 2
➢ pneumonia 2
➢ bronchoectasia 1
Indications for IGRA-tests  
➢ exposure to TB 62
➢ clinical signs compatible with TB 37
  1. * All children born in Finland before September 2006 were supposed to be BCG vaccinated even if this was not mentioned in the record.