Table 2 Risk of progression to active TB across IFN-gamma levels (IU/ml) by risk group

0.00

REF

REF

REF

REF

0.10

1.28 (1.00 to 2.33)

1.26 (1.12 to 1.40)

1.20 (1.00 to 1.79)

1.25 (1.11 to 1.42)

0.20

1.51 (1.00 to 3.62)

1.51 (1.24 to 1.78)

1.37 (1.00 to 2.57)

1.50 (1.22 to 1.84)

0.30

1.73 (1.00 to 4.88)

1.76 (1.37 to 2.16)

1.54 (1.00 to 3.35)

1.73 (1.33 to 2.24)

0.35

1.83 (1.00 to 5.50)

1.88 (1.43 to 2.34)

1.62 (1.00 to 3.74)

1.85 (1.39 to 2.43)

0.40

1.94 (1.01 to 6.11)

2.00 (1.49 to 2.52)

1.70 (1.01 to 4.12)

1.96 (1.44 to 2.62)

0.50

2.14 (1.01 to 7.36)

2.23 (1.62 to 2.87)

1.85 (1.01 to 4.89)

2.19 (1.56 to 3.00)

0.70

2.56 (1.01 to 9.85)

2.69 (1.89 to 3.54)

2.16 (1.02 to 6.39)

2.62 (1.78 to 3.71)

1.00

3.21(1.02 to 13.27)

3.33 (2.29 to 4.46)

2.61 (1.02 to 8.34)

3.23 (2.12 to 4.68)

2.00

5.62 (1.10 to 24.32)

5.17 (3.62 to 6.92)

4.15 (1.05 to 14.45)

4.93 (3.32 to 7.27)

3.00

8.39 (1.35 to 34.57)

6.58 (4.61 to 8.77)

5.69 (1.16 to 19.84)

6.16 (4.18 to 8.95)

4.00

11.50 (1.73 to 45.48)

7.62 (5.01 to 10.29)

7.24 (1.33 to 26.21)

7.02 (4.43 to 10.26)

5.00

14.99 (2.49 to 55.66)

8.39 (5.28 to 11.66)

8.84 (1.65 to 32.72)

7.61 (4.53 to 11.10)

6.00

18.83 (3.56 to 67.91)

9.01 (5.47 to 13.16)

10.53 (2.09 to 38.31)

8.06 (4.62 to 12.33)

7.00

23.00 (5.07 to 78.98)

9.60 (5.95 to 14.44)

12.35 (2.75 to 43.89)

8.49 (4.96 to 13.43)

8.00

27.30 (6.68 to 94.05)

10.21 (6.77 to 15.17)

14.26 (3.56 to 48.25)

8.97 (5.58 to 14.43)

10.00

35.34 (9.59 to 119.43)

11.37 (7.98 to 16.53)

17.84 (5.06 to 60.08)

9.94 (6.44 to 15.71)

12.00

41.74 (11.25 to 146.63)

12.33 (8.49 to 18.17)

20.73 (5.87 to 72.65)

10.79 (6.81 to 17.48)

15.00

46.86 (13.17 to 173.69)

13.35 (9.01 to 20.46)

23.20 (6.66 to 82.24)

11.72 (7.17 to 19.42)

20.00

47.70 (13.46 to 175.51)

13.84 (9.24 to 21.09)

23.85 (7.02 to 83.46)

12.19 (7.57 to 20.11)