title: Papulopustular rosacea: prevalence and relationship to photodamage.
abstract: BACKGROUND
  The prevalence and pathogenesis of rosacea is uncertain. Previously, studies used varying definitions of disease and have not explored the relationship of its prevalence to ultraviolet (UV) exposure or photodamage.
  
  
  OBJECTIVE
  We investigated the prevalence of papulopustular rosacea (PPR) and its relationship to UV radiation exposure in 1000 randomly selected Irish individuals.
  
  
  METHODS
  A total of 1000 individuals (500 with low UV exposure and 500 with high UV exposure) were examined. PPR was diagnosed using a standardized definition and photodamage was assessed using a photodamage scale.
  
  
  RESULTS
  The prevalence of PPR was 2.7%. PPR prevalence was not significantly related to photodamage or UV exposure.
  
  
  CONCLUSIONS
  The power to compare UV exposure among those with and without PPR was limited.
  
  
  CONCLUSIONS
  PPR prevalence in Ireland was 2.7%. UV radiation exposure does not appear to affect the prevalence of PPR.
authors.affiliation: Regional Center of Dermatology, Mater Misericordiae University Hospital, Dublin, Ireland.
authors.forename: Maeve A
authors.initials: MA
authors.lastname: McAleer
authors.forename: Patricia
authors.initials: P
authors.lastname: Fitzpatrick
authors.forename: Frank C
authors.initials: FC
authors.lastname: Powell
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007494:Ireland / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D012393:Rosacea / Q000453:epidemiology / Q000209:etiology*; D012867:Skin / Q000528:radiation effects*; D012880:Skin Pigmentation; D014466:Ultraviolet Rays / Q000009:adverse effects*