Table 4– Characteristics of 2337 contacts of pulmonary tuberculosis patients in relation to latent tuberculosis infection (LTBI) diagnosis at the Public Health Service in Amsterdam (the Netherlands) from 2008 to 2011
FactorContacts diagnosed with LTBIContacts without LTBI diagnosisCrude ORAdjusted OR
All254 (11)2083 (89)
Index factors
 Sex
  Males164 (12)1159 (88)11
  Females90 (9)924 (91)0.8 (0.5–1.4)0.9 (0.5–1.4)
 Age
  0–14 years3 (3)102 (97)0.6 (0.1–4.8)0.6 (0.2–1.8)
  15–34 years157 (16)806 (84)2.0 (1.1–3.5)2.1 (1.2–3.6)
  35–54 years60 (7)811 (93)0.9 (0.5–1.7)1.2 (0.6–2.3)
  ≥55 years34 (9)364 (91)11
 Country of birth
  The Netherlands76 (8)847 (92)1
  Outside the Netherlands178 (13)1236 (87)1.5 (0.9–2.4)
 At risk#
  No242 (11)1989 (89)1
  Yes12 (11)94 (89)0.6 (0.1–2.5)
 Sputum smear status
  Positive245 (12)1851 (88)11
  Negative9 (4)232 (96)0.4 (0.2–0.8)0.3 (0.1–0.7)
Contact factors
 Sex
  Male158 (13)1048 (87)11
  Female96 (9)982 (91)0.6 (0.5–0.8)0.6 (0.5–0.9)
 Age
  0–4 years8 (4)176 (96)0.3 (0.1–0.6)0.1 (0.1–0.3)
  5–14 years21 (14)131 (86)0.7 (0.4–1.3)0.4 (0.2–0.8)
  15–34 years88 (10)766 (90)0.5 (0.3–0.7)0.3 (0.2–0.5)
  35–54 years93 (11)775 (89)0.6 (0.5–0.8)0.6 (0.4–0.8)
  ≥55 years44 (16)231 (84)11
 Nationality
  Dutch153 (10)1354 (90)11
  Other78 (37)135 (63)4.0 (3.0–5.5)2.8 (1.9–4.1)
  Unknown23 (4)594 (96)0.2 (0.1–0.7)0.3 (0.1–0.7)
 Type of contact
  First circle158 (15)909 (85)6.1 (2.7–13.7)4.0 (1.9–8.3)
  Second circle79 (8)855 (92)3.0 (1.3–6.6)2.1 (1.0–4.5)
  Third circle11 (4)265 (96)11
  Unknown6 (10)54 (90)3.2 (1.0–9.6)2.3 (0.8–6.8)
 BCG
  No evidence of vaccination/unknown154 (7)1915 (93)11
  Evidence of vaccination100 (37)168 (63)6.2 (4.3–9.0)4.4 (2.9–6.6)
  • Data are presented as n (%) or OR (95% CI). BCG: bacille Calmette–Guérin. #: the homeless and drug users.