Table 1 Characteristics of patients with immune-mediated inflammatory diseases (IMID) with (group II) or without (group I) latent tuberculosis infection (LTBI)
Group I no LTBIGroup II LTBI
Age, mean (range), years42.5 (17–82)51 (31–79)
IMID (RA/SA/CD), no. of patients11/10/1218/15/2
Immunosuppressors (MTX/AZA/CT), no. of patients16/6/1815/1/11
Positive TST result (⩾10 mm), no of patients0/3330/35
Known size of TST result, no. of patients23/3327/35
    ⩽5 mm13/233/27
    6–10 mm10/230/27
    >10 mm0/2324/27
  • n, number of patients in each group; RA, rheumatoid arthritis; SA, spondylarthropathy; CD, Crohn’s disease; MTX, methotrexate; AZA, azathioprine; CT, corticosteroids (equivalent of prednisone ⩽10 mg/day); TST, tuberculin skin test.