Table 1.

Characteristics of included patients

Total number	50
Age (mean ± SD years)	31.2 ± 6.6
≤ 18 (n, %)	0
18–39 (n, %)	42 (84%)
40–49 (n, %)	7 (14%)
≥ 50 (n, %)	1 (2%)
BCG vaccination at birth (n, %)	50 (100%)
Type of disease
Ankylosing spondylitis	33 (66%)
Rheumatoid arthritis	17 (34%)
Biologic treatment
Infliximab (n, %)	50 (100%)
Each dose (mg)	200
Other treatments
Indomethacin (n, %)	13 (26%)
Daily dose (mg)	150
Naproxen (n, %)	4 (8%)
Daily dose (mg)	1500
Diclofenac (n, %)	16 (32%)
Daily dose (mg)	200
Hydroxychloroquine (n, %)	17 (34%)
Daily dose mean ± SD dose (mg)	270.5 ± 98.5
Methotrexate (n, %)	17 (34%)
Weekly dose mean ± SD dose (mg)	13.8 ± 3.3
Prednisolone
Daily dose mean ± SD (mg)	5.29 ± 1.21
≤ 2.5 mg (n, %)	1 (2%)
= 5 mg (n, %)	13 (26%)
≥ 7.5 mg (n, %)	3 (6%)
No prednisolone (n, %)	33 (66%)