945 consecutive severe psoriasis pts Rx TNFi or nbUVB phototherapy (2005-2010) w/ median F/U > 9 yrs. After propensity matching, incidence of future PsA was 1.18/100 w/ TNFi vs 2.48/100 w/ nbUVB (IRR 2.1; 1.37–2.98, P = 0.0002). TNFi lowered PsA risk (HR = 0.32). PsA predictors https://t.co/aBsXs6RpCY