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Table 2 Assocation with index case CXR appearance with TST positivity in contacts

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

Index CXR feature OR of positive TST in contacts (95% CI)
Cavities (ref = no cavity)
Cavity <4 cm diameter 7.58 (1.63–34.90)
Cavity ≥4 cm 12.25 (2.20–68.24)
Amount (%) of abnormal lungfield 1.05 (1.00–1.11)