Hip osteoarthritis prevalence estimates by three radiographic scoring systems

Arthritis Rheum. 1998 Feb;41(2):361-8. doi: 10.1002/1529-0131(199802)41:2<361::AID-ART21>3.0.CO;2-2.


Objective: To estimate and compare the age- and sex-specific prevalence of radiographic hip osteoarthritis (RHOA) in a population-based study of the Pima Indians, using 3 atlas-based methods for assessing features of RHOA.

Methods: Pelvic radiographs from 755 Pima Indians age > or = 45 years enrolled in a population-based study were read using the Kellgren/Lawrence (K/L) grading scale (grade 0-4) and 2 validated individual-radiographic-features (IRF) scales (grades 0-3 for narrowing and osteophytes).

Results: The age- and sex-specific prevalence of RHOA among Pima Indians assessed using the K/L scale was < 10% in all age and sex groups. The prevalence of grade > or = 2 osteophytes assessed using the 2 IRF scales were similar to each other in all age and sex groups. However, differences between the 2 IRF scoring systems were found for the prevalence of grade > or = 2 joint space narrowing.

Conclusion: Pima Indians have an age- and sex-specific prevalence of RHOA similar to that found in the US population. Our finding of different joint space narrowing prevalence by the 2 IRF grading scales supports the use of the same atlas-based case definitions for determining disease prevalence for comparative studies.

Publication types

  • Comparative Study
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Age Distribution
  • Aged
  • Aged, 80 and over
  • Arthrography / methods*
  • Female
  • Hip Joint / diagnostic imaging*
  • Humans
  • Indians, North American
  • Male
  • Middle Aged
  • Nutrition Surveys
  • Osteoarthritis / diagnostic imaging*
  • Osteoarthritis / epidemiology*
  • Pelvis / diagnostic imaging
  • Prevalence
  • Sex Distribution