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Table 2 Results of multiple logistical regression: Odds ratio for a positive TST (tuberculin skin test) result

From: Tuberculosis contact investigation with a new, specific blood test in a low-incidence population containing a high proportion of BCG-vaccinated persons

a)
TST (5 mm cut off) Odds ratio 95% confidence interval p
BCG vaccination 12.6 6.9–22.7 <0.0001
Age 1.0 0.98–1.04 0.5 (n.s.)
Sex 1.3 0.72–2.24 0.4 (n.s.)
Origin (Foreign/ German) 5.4 2.7–10.6 <0.0001
Previous contact tracing 1.7 0.3–10.9 0.6 (n.s.)
Exposure time 1.0 0.99–1.0 0.6 (n.s.)
b)
TST (10 mm cut off) Odds ratio 95% confidence interval p
BCG vaccination 4.8 2.3–9.6 <0.0001
Age 1.05 1.01–1.08 0.005
Sex 1.5 0.8–2.9 0.2 (n.s.)
Origin (Foreign/German) 7.3 3.7–14.3 <0.0001
Previous contact tracing 0.6 0.05–7.4 0.7 (n.s.)
Exposure time 1.0 0.99–1.0 0.99 (n.s.)