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Table 1 Criteria for lesion severity

From: Characteristics of peripheral Vγ2Vδ2 T cells in interferon-γ release assay negative pulmonary tuberculosis patients

Criteria Severity score
Disease
 No disease 0
  < 50% of area affected 1
  ≥ 50% of area affected 2
Cavitation
 No cavitation 0
Single cavity
  < 2 cm diameter 0.25
 2–4 cm diameter 0.5
  > 4 cm diameter 1
Multiple cavities
 Largest < 2 cm diameter 0.5
 Largest 2–4 cm diameter 1
 Largest > 4 cm diameter 2