Varus and valgus alignment and incident and progressive knee osteoarthritis

Leena Sharma*, Jing Song, Dorothy Dunlop, David Felson, Cora E. Lewis, Neil Segal, James Torner, T. Derek V. Cooke, Jean Hietpas, John Lynch, Michael Nevitt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

314 Scopus citations


Objective: Varus and valgus alignment increase medial and lateral tibiofemoral load. Alignment was associated with tibiofemoral osteoarthritis progression in previous studies; an effect on incident osteoarthritis risk is less certain. This study tested whether alignment influences the risk of incident and progressive radiographic tibiofemoral osteoarthritis. Methods: In an observational, longitudinal study of the Multicenter Osteoarthritis Study cohort, full-limb x-rays to measure alignment were acquired at baseline and knee x-rays were acquired at baseline and knee x-rays at baseline and 30 months. Varus alignment was defined as ≤178° and valgus ≤182°. Using logistic regression and generalised estimating equations, the associations of baseline alignment and incident osteoarthritis at 30 months (in knees without baseline osteoarthritis) and alignment and osteoarthritis progression (in knees with osteoarthritis) were examined, adjusting. For age, gender, body mass index, injury, laxity and strength, with neutral knees as referent. Results: 2958 knees (1752 participants) were without osteoarthritis at baseline. Varus (adjusted OR 1.49, 95% CI 1.06 to 2.10) but not valgus alignment was associated with incident osteoarthritis. 1307 knees (950 participants) had osteoarthritis at baseline. Varus alignment was associated with a greater risk of medial osteoarthritis progression (adjusted OR 3.59, 95% CI 2.62 to 4.92) and a reduced risk of lateral progression, and valgus with a greater risk of lateral progression (adjusted OR 4.85, 95% CI 3.17 to 7.42) and a reduced risk of medial progression. Conclusion: Varus but not valgus alignment increased the risk of incident tibiofemoral osteoarthritis. In knees with osteoarthritis, varus and valgus alignment each increased the risk of progression in the biomechanically stressed compartment.

Original languageEnglish (US)
Pages (from-to)1940-1945
Number of pages6
JournalAnnals of the Rheumatic Diseases
Issue number11
StatePublished - Nov 2010

ASJC Scopus subject areas

  • Immunology and Allergy
  • Rheumatology
  • Immunology
  • General Biochemistry, Genetics and Molecular Biology


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