RT Journal Article SR Electronic T1 A Family History of Psoriasis in a First-degree Relative in Children with JIA: to Include or Exclude? JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.150555 DO 10.3899/jrheum.150555 A1 Mercedes O. Chan A1 Ross E. Petty A1 Jaime Guzman YR 2016 UL http://www.jrheum.org/content/early/2016/03/09/jrheum.150555.abstract AB Objective To determine the consequences of disregarding first-degree relatives with psoriasis (FRP) as a classification criterion in juvenile idiopathic arthritis (JIA). Methods Criteria were examined in children from a prospective cohort with unclassified and psoriatic JIA. Results FRP was the most common reason children were unclassified (57/85, 67%); all 57 children could be classified if FRP were disregarded as an exclusion criterion. FRP was a necessary inclusion criterion to classify 11/77 (14.3%) children with psoriatic JIA. Conclusion Eliminating FRP as an exclusion criterion, but keeping it as an inclusion criterion in psoriatic JIA simplifies classification, though it is unclear whether the resulting classification would be better.