Table 3

Tuberculosis patients with strains with five or more copies of IS6110 and patients in cluster, with unadjusted and adjusted odds ratios (OR)

Vaiable/categoryPatients with ≥5 bandsOf whom in clusterUnadjusted univariate OR (95% CI)Adjusted multivariate OR (95% CI)#
n%n%
All cases7658913418
Place of birth
 Norway3859768181.01.0
 All foreign3808266171.0 (0.7–1.3)0.2 (0.1–0.4)+
 Norway3859768181.01.0
 Europe629815241.5 (0.8–2.8)0.4 (0.2–0.9)
 Asia16076850.2 (0.1–0.5)0.1 (0.0–0.2)
 Africa1508243291.9 (1.2–2.9)0.4 (0.2–0.7)
Country of birth
 Norway3859768181.0
 Former Yugoslavia4710013271.5 (0.9–2.6)
 Somalia1118035321.8 (1.3–2.5)
 Vietnam245300p<0.03§
 Pakistan6590460.4 (0.1–0.9)
 Thailand/Philippines237900p<0.03§
Sex
 Male4148880191.3 (0.9–1.9)1.1 (0.7–1.7)
 Female3518954151.01.0
Age
 0–24 yrs1378941301.01.0
 25–44 yrs2257949220.7 (0.4–1.1)0.7 (0.4–1.1)
 45–64 yrs1059115140.4 (0.2–0.5)0.2 (0.1–0.5)
 65+ yrs2989729100.3 (0.1–0.4)0.1 (0.0–0.2)
Site of disease
 Pulmonary50792102191.8 (1.2–2.7)1.6 (1.0–2.6)
 Extrapulmonary2588432151.01.0
Resistance to isoniazid and rifampicin§
 Sensitive to both70389108161.01.0
 Resistant to isoniazid, sensitive to rifampicin449016443.1(1.6–6.0)3.1 (1.4–6.6)
 Multidrug resistant1010087322.0 (4.6–105.2)16.4 (3.2–83.3)
  • CI: confidence interval

  • #: adjusted for continent of birth, sex, age group, location and resistance

  • : including six cases from the Americas and two with unknown foreign place of birth

  • +: adjusted for Norwegian versus non-Norwegian place of birth instead of continent

  • §: Fisher's exact test used if expected value was <5

  • ƒ: eight cases without result of susceptibility testing