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Table 3 Age-adjusted and multivariate odds ratios (OR) and 95% confidence intervals (95% CI) of QFT-positivity according to potential risk factors among homeless persons and caregivers, after excluding the subjects with active TB disease or indeterminate QFT results.

From: Tuberculosis infection among homeless persons and caregivers in a high-tuberculosis-prevalence area in Japan: a cross-sectional study

   Homeless persons (n = 255) Caregivers (n = 172)
   No. of subjects No.(%) of QFT-positivity Age-adjusted OR (95% CI) MultivariateOR (95% CI)† No. of subjects No.(%) of QFT-positivity Age-adjusted OR (95% CI) MultivariateOR (95% CI)†
Sex Male 253 130 (51.4) NA NA 79 20 (25.3) 1.0 1.0
  Female 2 0 (0.0) NA NA 93 22 (23.7) 0.95 (0.46-1.93) 0.91 (0.39-2.11)
Current smoker No 66 33 (50.0) 1.0 1.0 106 27 (25.5) 1.0 1.0
  Yes 185 93 (50.3) 1.19 (0.66-2.14) 1.23 (0.63-2.40) 63 13 (20.6) 0.81 (0.38-1.75) 0.72 (0.29-1.74)
Current drinker No 121 56 (46.3) 1.0 1.0 114 26 (22.8) 1.0 1.0
  Yes 129 70 (54.3) 1.74 (1.02-2.96)* 1.84 (1.01-3.37)* 54 13 (24.1) 1.23 (0.56-2.69) 1.15 (0.48-2.74)
Length of time spent living and/or working in the Airin district, year <10 years 107 38 (35.5) 1.0 1.0 105 18 (17.1) 1.0 1.0
  ≥10 years 128 78 (60.9) 2.52 (1.46-4.35)* 2.53 (1.39-4.61)* 63 24 (38.1) 2.60 (1.24-5.42)* 2.32 (1.05-5.13)*
Past exposure to TB patients No 196 96 (49.0) 1.0 1.0 138 27 (19.6) 1.0 1.0
  Yes 50 31 (62.0) 2.05 (1.05-3.99)* 1.51 (0.71-3.21) 32 14 (43.8) 3.63 (1.55-8.47)* 3.21 (1.30-7.91)*
Cough and/or sputum No 194 100 (51.6) 1.0 1.0 166 42 (25.3) NA NA
  Yes 59 29 (49.2) 0.91 (0.50-1.67) 0.64 (0.32-1.32) 6 0 (0.0) NA NA
General fatigue No 207 102 (49.3) 1.0 1.0 163 40 (24.5) 1.0 1.0
  Yes 46 27 (58.7) 1.66 (0.84-3.29) 1.47 (0.66-3.28) 9 2 (22.2) 0.96 (0.19-4.93) 1.06 (0.19-5.96)
Elevated body temperature No 244 124 (50.8) NA NA 171 42 (24.6) NA NA
  Yes 9 5 (55.6) NA NA 1 0 (0.0) NA NA
Past history of TB No 225 109 (48.4) 1.0 1.0 166 37 (22.3) NA NA
  Yes 30 21 (70.0) 2.23 (0.95-5.21) 1.51 (0.43-5.31) 6 5 (83.3) NA NA
Abnormal chest X-ray finding No 193 86 (44.6) 1.0 1.0 165 37 (22.4) NA NA
  Yes 62 44 (71.0) 2.62 (1.39-4.93)* 1.90 (0.78-4.60) 7 5 (71.4) NA NA
  1. *p < 0.05
  2. Abbreviations: TB, tuberculosis; NA, not applicable
  3. †Multivariate-adjusted for the listed factors and age.
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