TABLE 4

Utility of conventional epidemiology (CE) for the identification of paediatric tuberculosis (TB) source cases

CharacteristicTotalSource case identified by CEOR (95% CI)
YesNo
Cases176111 (63)65 (37)
Age years
 <57854 (69)24 (31)1.0
 5–149857 (58)41 (42)1.62 (0.87–3.03)
Sex
 Female10059 (59)41 (41)1.0
 Male7652 (68)24 (32)0.66 (0.35–1.24)
Population group
 CBO6143 (71)18 (30)1.0
 RFN5653 (95)3 (5)0.14 (0.04–0.50)
 FB5915 (25)44 (75)7.01 (3.14–15.66)
Method of detection
 Contact tracing108107 (99)1 (1)#
 Symptoms594 (4)55 (97)
 Other screening+90 (0)9 (100)

Data is presented as n or n (%), unless otherwise stated. CBO: Canadian-born “other”; RFN: registered First Nations; FB: foreign born; OR: odds ratio. #: this child was a close contact of a relative who lived in a neighbouring province-there was no source case in Alberta; : four children were index cases with symptoms and their source cases were identified through reverse contact tracing; +: other screening includes immigration medical evaluations, international adoptee screening and incidental findings.