TABLE 1.

Baseline data for the patients included in the study

VariableValue for group
Active TBNo TBAll evaluable patientsInconclusive resultsbHealthy control
No. of patients482573939
Age (median and 25th to 75th percentile)41 (34-51)47 (34-55)42 (34-53)38 (27-41)36.5 (29-45)
Sex [no. (%) female]16 (33%)10 (40%)26 (36%)6 (67%)32 (82%)
No. (%) HIV positive3 (6%)4 (16%)7 (10%)3 (33%)0
Individual CD4 cell count (109)/liter15, 100, 133200, 500, 650, 7305, 44, 159NDc
Tuberculin skin test results >12 mm, no./total screened (%)20/24 (88%)8/20 (40%)28/44 (64%)2/2 (100%)ND
Immigrant [no. (%)]27 (56%)9 (36%)36 (49%)2 (22%)0
IVDUa [no. (%)]2 (4%)3 (12%)5 (7%)1 (11%)0
Alcohol/shelter [no. (%)]8 (16%)3 (12%)11 (15%)00
Recent exposure [no. (%)]5 (8%)5 (20%)10 (14%)00
Patients with one or more risk factors [no. (%)]33 (69%)17 (64%)51 (68%)3 (33%)0
  • a Intravenous drug user.

  • b Three were HIV seropositive, one was bone marrow suppressed following immunosuppressive treatment, one had severe advanced pulmonary TB, and one had disseminated TB.

  • c ND, not done.