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Table 3 Variables associated with latent TB infection (LTBI) in both periods

From: Yield of close contact tracing using two different programmatic approaches from tuberculosis index cases: a retrospective quasi-experimental study

2001-2004 2005-2008
Variables (n) Contacts with LTBI
(n = 496)
p value OR (CI 95%) Variables (n) Contacts with LTBI
(n = 877)
p value OR (CI 95%)
Index case AFB positive (n = 193) 356 (71.8%) 0.001 0.5 (0.3-0.7) Index case AFB positive (n = 287) 665 (75.8%) <0.001 1.7 (1.3–2.3)
Index case HIV positive (n = 4) 12 (2.4%) 0.2 0.4 (0.1-1.3) Index case HIV positive (n = 5) 16 (1.8%) 0.1 0.4 (0.1–1.1)
Household contact (n = 620) 387 (78%) 0.7 0.9 (0.6-1.3) Household contact (n = 761) 547 (62.4%) 0.07 1.2 (0.9-1.6)
Smoking contact (n = 81) 54 (10.9%) 0.8 1.0 (0.6-1.8) Smoking contact (n = 88) 82 (9.4%) <0.001 9.5 (2.9 – 30.5)
Contacts living in poor areas (slum) (n = 111) 71 (15.5%) 0.6 1.1 (0.7-1.8) Contacts living in poor areas (slum) (n = 205) 141 (17.7%) 0.9 0.9 (0.6-1.3)
Contacts prisoners/previous hospitalization (n = 26) 22 (4.5%) 0.1 2.6 (0.8-7.6) Contacts prisoners/previous hospitalization (n =35) 20 (2.3%) 0.3 0.6 (0.2-1.3)
Contacts with alcohol abuse (n = 18) 13 (2.6%) 0.9 1.2 (0.4-3.4) Contacts with alcohol abuse (n = 45) 44 (5%) <0.001 14.9 (2.0-109)
  1. Excluded from the table are injecting drug use, use of non-injectable drugs, diabetes “mellitus” and use of immunosuppressive drugs because no contact was diagnosed with LTBI. Statistical test used was Chi-square.