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Table 2 Annual risk of tuberculosis infection

From: Decreased annual risk of tuberculosis infection in South Korean healthcare workers using interferon-gamma release assay between 1986 and 2005

AGE Number MID_YEARa ARI (%) 95% CI
20–24 230 2005.4 0.29 0.15–0.44
25–29 605 2003.7 0.26 0.18–0.34
30–34 403 2001.0 0.36 0.26–0.47
35–39 501 1998.5 0.51 0.40–0.62
40–44 481 1995.9 0.82 0.69–0.96
45–49 518 1993.5 1.05 0.91–1.20
50–54 286 1991.0 1.35 1.14–1.59
55–59 163 1988.5 1.26 1.01–1.57
 ≥ 60 46 1986.0 1.11 0.69–1.68
  1. aMidyear of TB infection (y) = 2017-mean age of each age group/2