Among 2359 RA & PsA pts (3169 TNFi courses 1778/1391), serious infection (SIE) rates were higher in RA 4.17/100PY vs PsA 2.16/100PY. PsA had 41% lower SIE risk (HR 0.59, p=0.004) - Registry data from the NOR-DMARD study https://t.co/llH07TFHOI