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Table 1 Risk factors for LTBI by TST

From: Results of five-year systematic screening for latent tuberculosis infection in healthcare workers in Portugal

 

TST in mm

 

<5

≥5 - <10

≥10 - <15

≥15

 

N (%)

N (%)

N (%)

N (%)

BCG scar or record (%)

1061 (63.2)

446 (68.3)

714 (61.3)

924 (53.9)

Age ± SD (years)

35 ± 10.7

37 ± 11.9

39 ± 12

41 ±10.7

Duration of exposure ± SD

9 ± 9.6

12 ± 11.3

13 ± 11.6

16 ± 10.8

Low Risk (row%)

215 (25.7)

100 (12.0)

212 (25.4)

309 (37.0)

Moderate risk

897 (34.7)

331 (12.8)

558 (21.6)

802 (31.0)

High risk

566 (31.7)

222 (12.4)

394 (22.1)

603 (33.8)

All (%)

1678 (32.2)

653 (12.5)

1164 (22.3)

1714 (32.9)