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Table 2 QuantiFERON®TB Gold positive results distributed by TST-induration, gender, BCG-status and origin

From: School based screening for tuberculosis infection in Norway: comparison of positive tuberculin skin test with interferon-gamma release assay

  Total study group TST 6–9 mm TST 10–14 mm TST =>15 mm
Variable TST QFT+   TST QFT+ TST QFT+ TST QFT+
  No. No. (%) 95% CI No. No. (%) No. No. (%) No. No. (%)
Study group 511 44 (9) 6.4 – 11.2 207 8 (4) 198 13 (7) 106 23 (22)
Gender          
Male 275 21 (8) 4.9 – 11.2 110 6 (6) 110 7 (6) 55 8 (15)
Female 236 23 (10) 6.4 – 14.0 97 2 (2) 88 6 (7) 51 15 (29)
Origin of child          
Western-born 280 16 (6) 3.4 – 8.9 131 6 (5) 110 7 (6) 39 3 (8)
Second generation immigrant 108 6 (6) 2.3 – 11.1 41 1 (2) 44 1 (2) 23 4 (17)
First generation immigrant 123 22 (18) 11.9 – 25.4 35 1 (3) 44 5 (11) 44 16 (36)
BCG-scar          
Scar 236 23 (10) 6.4 – 14.0 80 2 (3) 89 5 (6) 67 16 (24)
No scar 262 18 (7) 4.2 – 10.4 125 6 (5) 101 7 (7) 36 5 (14)
Doubtful or no report 13 3 (23) 6.2 – 50.9 2 0 8 1 3 2
  1. Number of QuantiFERON®TB Gold positive results among 511 tuberculin skin test positive children detected in the Norwegian school based screening programme in the school year of 2005–6.