borderline significantp = 0.05
During almost 20 years of follow-up across all IJD categories, OI occurred more often in RA (17.9%) than PsA (12.6%) or AS patients (13.3%) ( p = 0.002) with a significantly higher overall OI incidence rate in RA patients than in PsA and AS patients (both p < 0.01) while the rate difference between PsA and AS was borderline significant ( p = 0.05) (Table 2 ).