title: A correlative study between prevalence of chondromalacia patellae and sports injury in 4068 students.
abstract: OBJECTIVE
  To study the prevalence of chondromalacia patella among college students and the correlation with sports injury.
  
  
  METHODS
  354 students from gymnastic department and 429 from nongymnastic department with knee joint pain were selected. 184 students from gymnastic department and 342 from nongymnastic department were checked randomly by a surgeon. 77 patients (37 males, 40 females) from gymnastic department and 119 patients (62 males, 57 females) from nongymnastic department were diagnosed as chondromalacia patellae. The amount of exercise and the occurrence of sports injury were investigated in each student. All data were analyzed with SPSS 10.0 statistical software.
  
  
  RESULTS
  The prevalence of chondromalacia patella was 20.1% in female students and 11.6% in male students from gymnastic department, and 5.61% in female students and 4.92% in male students from nongymnastic department. The amount of exercise and the occurrence of sports injury to the knee joint in students from gymnastic department were greater than those from nongymnastic department.
  
  
  CONCLUSIONS
  In both female and male students, the prevalence of chondromalacia patella is higher in gymnastic department than nongymnastic department. Sports injury is an important cause of chondromalacia patella.
authors.affiliation: Affiliated Hospital of Taishan Medical College, Taishan, Shandong Province 271000, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Xiang-qing
authors.initials: XQ
authors.lastname: Kong
authors.forename: Cong
authors.initials: C
authors.lastname: Cheng
authors.forename: Mao-hua
authors.initials: MH
authors.lastname: Liang
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D001265:Athletic Injuries / Q000453:epidemiology / Q000473:pathology; D002357:Cartilage Diseases / Q000175:diagnosis / Q000453:epidemiology*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D015897:Comorbidity; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D007718:Knee Injuries / Q000453:epidemiology* / Q000473:pathology; D008297:Male; D010329:Patella / Q000473:pathology*; D015995:Prevalence; D011336:Probability; D011379:Prognosis; D012016:Reference Values; D012307:Risk Factors; D017678:Sex Distribution