title: Prevalence of hip symptoms and radiographic and symptomatic hip osteoarthritis in African Americans and Caucasians: the Johnston County Osteoarthritis Project.
abstract: OBJECTIVE
  To report contemporary estimates of the prevalence of hip-related osteoarthritis (OA) outcomes in African Americans and Caucasians aged>or=45 years.
  
  
  METHODS
  Weighted prevalence estimates and their corresponding 95% confidence intervals for hip symptoms, radiographic hip OA, symptomatic hip OA, and severe radiographic hip OA were calculated using SUDAAN for age, race, and sex subgroups among 3068 participants (33% African Americans, 38% men) in the baseline examination (1991-97) of The Johnston County Osteoarthritis Project, a population-based study of OA in North Carolina. Radiographic hip OA was defined as Kellgren-Lawrence radiographic grade>or=2, moderate/severe radiographic hip OA as grades 3 and 4, and symptomatic hip OA as hip symptoms in a hip with radiographic OA.
  
  
  RESULTS
  Hip symptoms were present in 36%; 28% had radiographic hip OA; nearly 10% had symptomatic hip OA; and 2.5% had moderate/severe radiographic hip OA. Prevalence of all 4 outcomes was higher in older individuals; most outcomes were higher for women and African Americans.
  
  
  CONCLUSIONS
  African Americans in this population do not have a lower prevalence of hip-related OA outcomes as previous studies suggested. Increasing public and health system awareness of the relatively high prevalence of these outcomes, which can be disabling, may help to decrease their effects and ultimately prevent them.
authors.affiliation: Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, CB 7280, 3300 Thurston Building, Chapel Hill, NC 27599-7280, USA. joanne_jordan@med.unc.edu
authors.forename: Joanne M
authors.initials: JM
authors.lastname: Jordan
authors.forename: Charles G
authors.initials: CG
authors.lastname: Helmick
authors.forename: Jordan B
authors.initials: JB
authors.lastname: Renner
authors.forename: Gheorghe
authors.initials: G
authors.lastname: Luta
authors.forename: Anca D
authors.initials: AD
authors.lastname: Dragomir
authors.forename: Janice
authors.initials: J
authors.lastname: Woodard
authors.forename: Fang
authors.initials: F
authors.lastname: Fang
authors.forename: Todd A
authors.initials: TA
authors.lastname: Schwartz
authors.forename: Amanda E
authors.initials: AE
authors.lastname: Nelson
authors.forename: Lauren M
authors.initials: LM
authors.lastname: Abbate
authors.forename: Leigh F
authors.initials: LF
authors.lastname: Callahan
authors.forename: William D
authors.initials: WD
authors.lastname: Kalsbeek
authors.forename: Marc C
authors.initials: MC
authors.lastname: Hochberg
mesh_terms: D001741:Black or African American; D000368:Aged; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009657:North Carolina / Q000453:epidemiology; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000453:epidemiology; D011859:Radiography; D044465:White People