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Table 1 Characteristics of TST positive and negative contacts

From: Long term follow-up of drug resistant and drug susceptible tuberculosis contacts in a Low incidence setting

  DS-TB (%) HMR-TB (%) MDR-TB (%) p-value vs DS-TB
HMR-TB MDR-TB
Source Cases 2895 96 28   
Household contacts 7309 249 89   
Median contacts/source 3 3 3 <0.001^ 0.839^
Source Characteristic
Source Smear Positive 4709 (64) 139 (56) 57 (64) 0.005 0.939
Contact Characteristics
Demographics
Mean Age (Sd) 32.9 (21.2) 28.9 (20.4) 26.7 (19.1)   
Age Over 18 5489 (75) 170 (68) 57 (64) 0.013 0.015
Male Gender 3521 (48) 112 (45) 43 (48) 0.32 0.98
Birth Country
Canadian born 3163 (43) 87 (35) 60 (67)   
Foreign born 3609 (49) 154 (62) 23 (26)   
Unknown 536 (7) 8 (3) 6 (7)   
BCG status*
Positive 3340 (46) 132 (53) 44 (49)   
Negative 2977 (41) 94 (38) 42 (47)   
Unknown 991 (14) 23 (9) 3 (3)   
  1. ^Wilcoxon rank sum test.
  2. * 22% of values were calculated using age, country of origin and information from http://www.bcgatlas.org.