Age groups

10 - 20

21 - 30

31 - 40

41 - 50

≥51

TST (mean ± SD):

Day 0

3.9 ± 2.2

4.5 ± 5.5

5.5 ± 5.7

5.3 ± 7.4

3.4 ± 1.2

Day 614

4.5 ± 3.0

4.8 ± 5.6

7.5 ± 5.3

7.9 ± 6.5

5.7 ± 7.0

IFN-γ IU/ml (mean ± SD):

Day 0

0.018 ± 0.02

0.21 ± 0.03

0.43 ± 0.30

0 .37 ± 0.29

0.290 ± 05

Day 614

0.010 ± 0.15

0.161 ± 0.12

0.21 ± 0.37**

0.39 ± 0.2

0.55 ± 56**