Immunosuppression Adversely Affects TST but Not IGRAs in Patients with Psoriasis or Inflammatory Musculoskeletal Diseases

Table 6

The agreement between IGRAs and TST with negative/negative as the reference category.

		Negative	Positive	𝑛	Concordance	Kappa (std. Error)
		Ly-TbSpot
B-TbIFNg	Negative, 𝑛 (%)	41 (64)	8 (13)	64	0.88	0.71 (0.09)
	Positive, 𝑛 (%)	0 (0)	15 (23)
			Any risk factor 3.6 (1.06–12)
TST cut-off 10 mm	Negative, 𝑛 (%)	28 (38)	5(7)	74	0.65	0.32 (0.10)
			Age 1.14 (1.01–1.29)
	Positive, 𝑛 (%)	21 (28)	20 (27)
		Age 0.94 (0.90–0.98)
		Woman 0.22 (0.057–0.87)	Woman 0.071 (0.017–0.30)
		BCG 3.6 (1.11–12)
		B-TbIFNγ
TST cut off 10 mm	Negative, 𝑛 (%)	19 (37)	3 (6)	51	0.61	0.26 (0.11)
	Positive, 𝑛 (%)	17 (33)	12 (24)
		Age 0.90 (0.85–0.97)	Age 0.93 (0.87–0.99)
		Woman 0.17 (0.035–0.78)	Woman 0.13 (0.025–0.72)
		BCG 4.7 (1.18–18)
		Costeroids 0.15 (0.03–0.83) Corticosteroids 0.10 (0.01–0.94)