Format

Send to

Choose Destination
See comment in PubMed Commons below
Ann Rheum Dis. 2004 Nov;63(11):1427-33.

Validity and reliability of three definitions of hip osteoarthritis: cross sectional and longitudinal approach.

Author information

1
Department of General Practice, Erasmus MC, PO Box 1738, 3000 DR Rotterdam, Netherlands. m.reijman@erasmusmc.nl

Abstract

OBJECTIVES:

To compare the reliability and validity in a large open population of three frequently used radiological definitions of hip osteoarthritis (OA): Kellgren and Lawrence grade, minimal joint space (MJS), and Croft grade; and to investigate whether the validity of the three definitions of hip OA is sex dependent.

METHODS:

SUBJECTS:

from the Rotterdam study (aged > or= 55 years, n = 3585) were evaluated. The inter-rater reliability was tested in a random set of 148 x rays. The validity was expressed as the ability to identify patients who show clinical symptoms of hip OA (construct validity) and as the ability to predict total hip replacement (THR) at follow up (predictive validity).

RESULTS:

Inter-rater reliability was similar for the Kellgren and Lawrence grade and MJS (kappa statistics 0.68 and 0.62, respectively) but lower for Croft's grade (kappa statistic, 0.51). The Kellgren and Lawrence grade and MJS showed the strongest associations with clinical symptoms of hip OA. Sex appeared to be an effect modifier for Kellgren and Lawrence and MJS definitions, women showing a stronger association between grading and symptoms than men. However, the sex dependency was attributed to differences in height between women and men. The Kellgren and Lawrence grade showed the highest predictive value for THR at follow up.

CONCLUSIONS:

Based on these findings, Kellgren and Lawrence still appears to be a useful OA definition for epidemiological studies focusing on the presence of hip OA.

PMID:
15479891
PMCID:
PMC1754809
DOI:
10.1136/ard.2003.016477
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Support Center