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Table 1 Characteristics of source population and study group: number and prevalence of positive TST

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

Variable Population in nation born in 1991 Population in project area born in 1991 No. TST positives in project area Prevalence of TST positives in project area
  No. No. (%) No. % (95% CI)
Total 63662 33456 (53) 531 1.6 (1.5 – 1.7)
Gender     
Male 32617 17127 (53) 286 1.7 (1.5 – 1.9)
Female 31045 16329 (53) 245 1.5 (1.3 – 1.7)
Origin of child     
Western-born 57775 29712 (51) 288 0.9 (0.9 – 1.1)
Second generation immigrant 2867 2052 (72) 111 5.4 (4.5 – 6.5)
First generation immigrant 3020 1692 (56) 132 7.8 (6.6 – 9.2)
  1. Characteristics of children born in 1991 in nation and project area and 531 children referred because of positive tuberculin skin test result in the school based screening programme in Norway in the school year of 2005–6.