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Table 3 Relation between BCG scar and outcome of Quantiferon

From: Relation between BCG vaccine scar and an interferon-gamma release assay in immigrant children with “positive” tuberculin skin test (≥10 mm)

  With scar Without scar  
  Pos QFT/total number Pos QFT/total number p-value
Somalia 97/193 (50 %) 129/156 (83 %) <0.0001
Middle East + North Africa 34/140 (24 %) 34/50 (68 %) <0.0001
Rest of Africa 17/57 (30 %) 27/42 (64 %) 0.001
South East Asia 10/40 (25 %) 8/9 (89 %) 0.0007
Europe 4/41 (10 %) 4/9 (44 %) 0.0264
China + Taiwan + Mongolia 0/9 (0 %) 2/2 (100 %) 0.0182
India + Nepal 0/5 (0 %) 1/2 (50 %) ns
South America 1/7 (14 %) 0 ns
All boys 90/291 (31 %) 127/167 (76 %) <0.0001
All girls 73/201 (36 %) 78/103 (76 %) <0.0001
ALL CHILDREN 163/492 (33 %) 205/270 (76 %) <0.0001
  1. Positive Quantiferon (number out of total (%) with positive QFT in children with and without scar arriving to Sweden from different parts of the world. All children had TST ≥10 mm. (p-values refer to comparisons of proportions in children with and without BCG scar in the respective population)