Immunosuppression Adversely Affects TST but Not IGRAs in Patients with Psoriasis or Inflammatory Musculoskeletal Diseases
Table 2
Number of tests performed to the study population.
Group 1
Group 2
Group 3
Ly-TbSpot, (%)
Not done
5 (23.8)*
5 (6.8)
1 (7.1)
Neg
12 (57.1)
46 (62.2)
9 (64.3)
Pos
4 (19.0)
22 (29.7)
3 (21.4)
Indeterminate
0 (0.0)
1 (1.4)
1 (7.1)
B-TbIFNγ, (%)
Not done
2 (9.5)†
28 (37.8)
7 (50.0)*
Neg
17 (81.0)
34 (45.9)
5 (35.7)
Pos
2 (9.5)
11 (14.9)
2 (14.3)
Indeterminate
0 (0.0)
1 (1.4)
0 (0.0)
TST cut off 10 mm, (%)
Not done
8 (38.1)
12 (16.2)†
9 (64.3)*
Neg
4 (19.0)
28 (37.8)
4 (28.6)
Pos
9 (42.9)
34 (45.9)
1 (7.1)
*Higher proportion of missing test results, compared with the two other patient groups, . †Lower proportion of missing test results, compared with the two other patient groups, .
