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Table 1 Basic characteristics and TB-related findings of the study participants.

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

   Homeless persons (n = 263) Caregivers (n = 173)
Basic characteristics    
   Sex, female n (%) 2 (0.8) 94 (54.3)
   Age, years mean median (range) 58.0 59 (30-74) 48.2 48 (30-71)
30-49 n (%) 40 (15.2) 97 (56.1)
50-59 n (%) 108 (41.1) 52 (30.1)
60-74 n (%) 115 (43.7) 24 (13.9)
   Current smoker n (%) 189 (73.0) 63 (37.1)
   Current drinker n (%) 134 (51.9) 54 (32.0)
   Length of time spent living and/or working in the Airin district, years mean median (range) 13.5 10 (0.1-58) 10.3 5 (0.1-64)
<5 years n (%) 63 (25.9) 73 (43.2)
5-10 years n (%) 46 (18.9) 33 (19.5)
≥10 years n (%) 134 (55.1) 63 (37.3)
TB-related findings    
   Past history of TB n (%) 33 (12.6) 6 (3.5)
   Past exposure to TB patients n (%) 50 (19.8) 32 (18.7)
   Cough and/or sputum n (%) 64 (24.6) 6 (3.5)
   General fatigue n (%) 51 (19.6) 9 (5.2)
   Elevated body temperature n (%) 9 (3.5) 1 (0.6)
   Abnormal chest X-ray finding n (%) 68 (25.9) 7 (4.1)
   Active TB case n (%) 4 (1.5) 0 (0.0)
   Positive QFT result n (%) 133 (50.6) 42 (24.3)
   Indeterminate QFT result n (%) 4 (1.5) 1 (0.6)
  1. Abbreviations: TB, tuberculosis; QFT, QuantiFERON-TB Gold In-Tube
  2. The number of missing values was 20 for length of time spent in the Airin district, 10 for past exposure to TB patients, 4 for smoking, 5 for drinking and 3 for cough and/or sputum, general fatigue and elevated body temperature among homeless persons, and 4 for length of time spent in the Airin district, 2 for past exposure to TB patients, 3 for smoking and 4 for drinking among caregivers.
  3. None of the participants had a history of extra-pulmonary TB or used immunosuppressive agents.
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