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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