title: Work disability in psoriatic arthritis: a systematic review.
abstract: OBJECTIVE
  Work disability (WD) is an important functional outcome measure in arthritis. There is a large body of information on WD in rheumatic diseases such as RA and AS; however, until now factors that influence WD in PsA have not been systematically reviewed. Our objective was to perform a systematic and critical review of the current literature on WD and its measurement in PsA.
  
  
  METHODS
  A systematic literature search was conducted using Medline, Embase and Cochrane databases. The search strategy was supplemented by a manual search of cited articles. All original English language publications in the form of meta-analyses, randomized controlled trials (RCTs), observational studies and publications in abstract form were included. A quality assessment was made of the articles published in full form.
  
  
  RESULTS
  Nineteen publications (nine in abstract form) were identified. There is intermediate quality evidence that levels of unemployment (20-50%) and WD (16-39%) are high and associated with longer disease duration, worse physical function, high joint count, low educational level, female gender, erosive disease and manual work. There is sparse low-quality evidence that WD is worse in those with PsA than psoriasis alone.
  
  
  CONCLUSIONS
  Disability at work in those with PsA is high; however, data on its associations are limited by the small number of reports and heterogeneity of data collected. Future work should focus on the validation of WD data collection tools for use in PsA.
authors.affiliation: Department of Rheumatology, Royal National Hospital for Rheumatic Diseases, Upper Borough Walls, Bath BA11RL, UK. w.tillett@nhs.net
authors.forename: William
authors.initials: W
authors.lastname: Tillett
authors.forename: Corinne
authors.initials: C
authors.lastname: de-Vries
authors.forename: Neil J
authors.initials: NJ
authors.lastname: McHugh
mesh_terms: D015535:Arthritis, Psoriatic / Q000175:diagnosis* / Q000628:therapy; D004185:Disability Evaluation; D006801:Humans; D011788:Quality of Life; D012720:Severity of Illness Index; D014937:Work