title: Prevalent knee pain and sport.
abstract: OBJECTIVE
  To estimate the prevalence of knee pain in active athletes and to investigate potential associations to type, amount and duration of sports participation.
  
  
  METHODS
  339 athletes gave information about occupation, sports activity and different features of knee pain, based on a self-filled questionnaire.
  
  
  RESULTS
  The prevalence of knee pain within the preceding 12 months, constant or recurrent knee pain, absence from sport and absence from work due to knee pain, was 54%, 34%, 19% and 4%, respectively. Knee pain was positively associated with years of jogging and with weekly hours of participation in competitive gymnastics but negatively with weekly hours of tennis. Constant or recurrent knee pain was positively associated with years of swimming. Absence from sport due to knee pain was positively associated with weekly hours of soccer participation.
  
  
  CONCLUSIONS
  Knee pain is a common symptom in athletes. The prevalence is associated with the type, amount and duration of sports participation.
authors.affiliation: Department of Rheumatology, Aarhus University Hospital, Denmark.
authors.forename: T
authors.initials: T
authors.lastname: Hahn
authors.forename: A
authors.initials: A
authors.lastname: Foldspang
mesh_terms: D000293:Adolescent; D000328:Adult; D001265:Athletic Injuries / Q000453:epidemiology* / Q000209:etiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D015994:Incidence; D007718:Knee Injuries / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D010146:Pain / Q000453:epidemiology* / Q000209:etiology; D012008:Recurrence; D013177:Sports / Q000706:statistics & numerical data