TABLE 3

Culture status of paediatric tuberculosis (TB) cases in Alberta by demographic and clinical characteristics, 1990–2014

CharacteristicsTotalCulture specimenp-value#OR (95% CI)
NegativePositive
Cases16890 (54)78 (46)
Age years0.01
 <57146 (65)25 (35)1
 5–149744 (45)53 (55)2.21 (1.16–4.21)
Sex0.23
 Female9346 (50)47 (51)1
 Male7544 (59)31 (41)0.69 (0.37–1.27)
Population group0.20
 CBO-CB159 (60)6 (40)1
 CBO-FB4024 (60)16 (40)1.00(0.30–3.36)
 RFN5432 (59)22 (41)0.97(0.30–3.11)
 FB5925(42)34(58)0.49(0.15–1.56)
Disease site0.02
 Pulmonary13679 (58)57 (42)1
 Extrapulmonary3211 (34)21 (66)0.38 (0.17–0.85)
Method of detection<0.001
 Symptoms5819 (33)39 (67)1
 Contact tracing10169 (68)32 (32)0.22 (0.11–0.45)
 Other screening+92 (22)7 (78)1.71 (0.32–9.01)

Data are presented as n or n (%), unless otherwise stated. CBO-CB: Canadian-born “other” with Canadian-born parents; CBO-FB: Canadian-born “other” with foreign-born parents; RFN: registered First Nations; FB: foreign born; OR: odds ratio (crude and unadjusted for any other variables in the table). #: Pearson's Chi-squared test or Fisher's exact test if cells contain values <5. : of the 101 children whose method of detection was contact tracing and who had one or more specimens submitted for culture, 85 had primary pulmonary TB complex alone (see figure 3). Of these only 22 (25.9%) were culture-positive. +: other screening includes immigration medical evaluations, international adoptee screening and incidental findings.