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Table 3 Relationship of non-radiological features of index cases to TST positivity in contacts

From: TST positivity in household contacts of tuberculosis patients: a case-contact study in Malawi

Index case characteristics OR of positive TST in contact (95% CI)
Univariate analysis Multivariate analysisa
Male sex 4.05 (1.26–13.04) 7.62 (1.14–50.77)
Age in years 0.96 (0.88–1.04) -
Body mass index in kg/m2 1.06 (0.84–1.34) -
Duration of cough in weeks 1.04 (0.93–1.16) -
Smoker 0.75 (0.11–4.92) -
Peripheral blood WBC 1.44 (1.03–2.01) 1.73 (1.01–2.94)
HIV negative 8.25 (0.97–69.87) 25 (1.26–100)
Days to positivity on sputum culture 0.95 (0.80–1.13) 0.96 (0.67–1.38)
%LB + AFB count 0.97 (0.95–1.00) 1.02 (0.97–1.06)
  1. aMultivariate ORs including random effects to account for non-independence of some observations