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Table 1 Characteristics of 455 contacts according with the presence of boosting

From: The presence of a booster phenomenon among contacts of active pulmonary tuberculosis cases: a retrospective cohort

  Presence of boosting Absence of boosting P value
Gender (male/female) 9/19 151/276 0.8
Presence of BCG scar* (yes/no) 16/11 293/127 0.2
Age (mean ± SD) 42.3 ± 21.1 28.7 ± 21.7 0,001
  1. SD: standard deviation; * There was information about BCG vaccination in the chart of 447 contacts that underwent the second TST.