title: Incidence and prevalence of psoriatic arthritis, ankylosing spondylitis, and reactive arthritis in the first descriptive population-based study in the Czech Republic.
abstract: OBJECTIVE
  To estimate the annual incidence and prevalence of psoriatic arthritis (PsA), ankylosing spondylitis (AS), and reactive arthritis (ReA) in a sample of the Czech population.
  
  
  METHODS
  The population-based study was conducted in two regions of the Czech Republic (with a total population of 186000 inhabitants) in 2002-2003. Incident cases were registered on condition of confirming a definite diagnosis according to existing classification criteria during the study period (1 March 2002 to 1 March 2003). Prevalence was studied on the basis of identification of established diagnoses (before 1 March 2002) from registers of living patients of participating rheumatologists and other specialists. The age-standardized estimates of incidence and prevalence were calculated using the European standard population.
  
  
  RESULTS
  The total annual incidence of PsA in adults aged >or= 16 years was 3.6/100000 [95% confidence interval (CI) 1.4-7.6/100000] and the prevalence of PsA was 49.1/100000 (95% CI 39.5-60.4/100000). The annual incidence of AS in adults was 6.4/100000 (95% CI 3.3-11.3/100000) and the prevalence of AS was 94.2/100000 (95% CI 80.8-109.2/100 000). The annual incidence of ReA in adults was 9.3/100000 (95% CI 5.5-14.8/100000) and the prevalence of ReA was 91.3/100000 (95% CI 78.1-106.2/100000).
  
  
  CONCLUSIONS
  The annual incidence and prevalence rates of PsA, AS, and ReA in the first population-based survey in the Czech Republic compared well with data reported from other countries.
authors.affiliation: Institute of Rheumatology, 1st Faculty of Medicine, Charles University in Prague, Czech Republic.
authors.forename: P
authors.initials: P
authors.lastname: Hanova
authors.forename: K
authors.initials: K
authors.lastname: Pavelka
authors.forename: I
authors.initials: I
authors.lastname: Holcatova
authors.forename: H
authors.initials: H
authors.lastname: Pikhart
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D015535:Arthritis, Psoriatic / Q000453:epidemiology*; D016918:Arthritis, Reactive / Q000453:epidemiology*; D018153:Czech Republic / Q000453:epidemiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D000091402:Prohibitins; D013167:Spondylitis, Ankylosing / Q000453:epidemiology*