Table 2

Incidence rate of AAU, psoriasis and IBD in patients with AS and controls

 Patients with ASControlsIncidence rate ratio* (95% CI)
EAM, nIncidence rate†EAM, nIncidence rate†
AAU2038.91800.4221.1 (16.3 to 27.3)
Psoriasis903.363411.811.9 (1.5 to 2.4)
IBD622.36840.445.3 (3.8 to 7.4)
  • *The incidence rate ratio is calculated as the incidence rate for patients divided by the incidence rate for controls.

  • †Number of patients or controls with EAM/1000 person-years.

  • AAU, acute anterior uveitis; AS, ankylosing spondylitis; EAM, extra-articular manifestation; IBD, inflammatory bowel disease.