Table 3. Number of patients with each severity score in the anergic and TST-positive groups.

Category	Anergic patients	TST positive patients
Mild (score ≤ 2.5)	8	18
Moderate(score 2.5-6)	8	11
Severe(score ≥ 6)	23	14

The final lesion severity score was the sum of the scores of the six lung fields (every lung field = a+b of Table 1, Figure 1) and ranked as follows: ≤ 2.5 as mild, 2.5-6 as moderate, and ≥ 6 as severe.