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Table 1 Demographic and behavioral characteristics of the study participants

From: Tuberculosis contact investigation with a new, specific blood test in a low-incidence population containing a high proportion of BCG-vaccinated persons

Variables n
Age of contacts (years) – mean (± SD) 28.5 (± 10.5)
Previous BCG vaccination 157 (50.8%)
Origin (Foreign/German) 84 (27.1%)/ 225 (72.9%)
Residence time (weeks) – mean (± SD) 535.4 (± 394)
Exposure time (hours) – mean (± SD) 221 (± 273)
Previous contact tracing; TST results 8; 1 TST-positive
No. of contacts per source – mean (± SD) 20 (± 13)
Foreign places of birth 25