Proximal femur shape differs between subjects with lateral and medial knee osteoarthritis and controls

The Osteoarthritis Initiative

Barton L Wise, L. Kritikos, J. A. Lynch, F. Liu, N. Parimi, K. L. Tileston, M. C. Nevitt, Nancy E Lane

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Objective: This study examined the association of proximal femur shape with ipsilateral medial and lateral compartment knee osteoarthritis (OA). Design: Radiographs were obtained from the NIH-funded Osteoarthritis Initiative (OAI). Cases of isolated radiographic lateral compartment knee OA were defined on baseline radiographs as Kellgren/Lawrence (K/L) Grade≥2 and joint space narrowing (JSN)>0 in the lateral compartment and JSN=0 in the medial compartment; isolated medial compartment knee OA had K/L≥2 and JSN>0 medially with JSN=0 inthe lateral compartment. Controls had K/L<2 and JSN=0 in both compartments. Controls were frequency matched to cases by sex and 10-year age intervals. We characterized the shape of the proximal femurs on radiographs using Active Shape Modeling (ASM) and determined the association of proximal femur shape with knee OA using logistic regression. Results: There were 168 lateral compartment knee OA cases (mean body mass index (BMI) 29.72±5.26), 169 medial compartment knee OA cases (mean BMI 29.68±4.83) and 168 controls (mean BMI 26.87±4.2). Thirteen modes were derived for femur shape which described 95.5% of the total variance in proximal femur shape in the population. Modes 6, 8 and 12 were associated with prevalent lateral compartment knee OA. Medial compartment knee OA was associated with proximal femur modes 1, 5, 8, and 12. Conclusions: Prevalent lateral and medial compartment knee OA are associated with different ipsilateral proximal femur shapes. Additional studies are needed to better define how the shape of the proximal femur influences compartment-specific knee OA.

Original languageEnglish (US)
Pages (from-to)2067-2073
Number of pages7
JournalOsteoarthritis and Cartilage
Volume22
Issue number12
DOIs
StatePublished - 2014

Fingerprint

Knee Osteoarthritis
Osteoarthritis
Femur
Joints
Logistics
Body Mass Index
Logistic Models

Keywords

  • Compartment
  • Hip
  • Knee
  • Osteoarthritis
  • Shape

ASJC Scopus subject areas

  • Biomedical Engineering
  • Orthopedics and Sports Medicine
  • Rheumatology

Cite this

Proximal femur shape differs between subjects with lateral and medial knee osteoarthritis and controls : The Osteoarthritis Initiative. / Wise, Barton L; Kritikos, L.; Lynch, J. A.; Liu, F.; Parimi, N.; Tileston, K. L.; Nevitt, M. C.; Lane, Nancy E.

In: Osteoarthritis and Cartilage, Vol. 22, No. 12, 2014, p. 2067-2073.

Research output: Contribution to journalArticle

Wise, Barton L ; Kritikos, L. ; Lynch, J. A. ; Liu, F. ; Parimi, N. ; Tileston, K. L. ; Nevitt, M. C. ; Lane, Nancy E. / Proximal femur shape differs between subjects with lateral and medial knee osteoarthritis and controls : The Osteoarthritis Initiative. In: Osteoarthritis and Cartilage. 2014 ; Vol. 22, No. 12. pp. 2067-2073.
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abstract = "Objective: This study examined the association of proximal femur shape with ipsilateral medial and lateral compartment knee osteoarthritis (OA). Design: Radiographs were obtained from the NIH-funded Osteoarthritis Initiative (OAI). Cases of isolated radiographic lateral compartment knee OA were defined on baseline radiographs as Kellgren/Lawrence (K/L) Grade≥2 and joint space narrowing (JSN)>0 in the lateral compartment and JSN=0 in the medial compartment; isolated medial compartment knee OA had K/L≥2 and JSN>0 medially with JSN=0 inthe lateral compartment. Controls had K/L<2 and JSN=0 in both compartments. Controls were frequency matched to cases by sex and 10-year age intervals. We characterized the shape of the proximal femurs on radiographs using Active Shape Modeling (ASM) and determined the association of proximal femur shape with knee OA using logistic regression. Results: There were 168 lateral compartment knee OA cases (mean body mass index (BMI) 29.72±5.26), 169 medial compartment knee OA cases (mean BMI 29.68±4.83) and 168 controls (mean BMI 26.87±4.2). Thirteen modes were derived for femur shape which described 95.5{\%} of the total variance in proximal femur shape in the population. Modes 6, 8 and 12 were associated with prevalent lateral compartment knee OA. Medial compartment knee OA was associated with proximal femur modes 1, 5, 8, and 12. Conclusions: Prevalent lateral and medial compartment knee OA are associated with different ipsilateral proximal femur shapes. Additional studies are needed to better define how the shape of the proximal femur influences compartment-specific knee OA.",
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T2 - The Osteoarthritis Initiative

AU - Wise, Barton L

AU - Kritikos, L.

AU - Lynch, J. A.

AU - Liu, F.

AU - Parimi, N.

AU - Tileston, K. L.

AU - Nevitt, M. C.

AU - Lane, Nancy E

PY - 2014

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N2 - Objective: This study examined the association of proximal femur shape with ipsilateral medial and lateral compartment knee osteoarthritis (OA). Design: Radiographs were obtained from the NIH-funded Osteoarthritis Initiative (OAI). Cases of isolated radiographic lateral compartment knee OA were defined on baseline radiographs as Kellgren/Lawrence (K/L) Grade≥2 and joint space narrowing (JSN)>0 in the lateral compartment and JSN=0 in the medial compartment; isolated medial compartment knee OA had K/L≥2 and JSN>0 medially with JSN=0 inthe lateral compartment. Controls had K/L<2 and JSN=0 in both compartments. Controls were frequency matched to cases by sex and 10-year age intervals. We characterized the shape of the proximal femurs on radiographs using Active Shape Modeling (ASM) and determined the association of proximal femur shape with knee OA using logistic regression. Results: There were 168 lateral compartment knee OA cases (mean body mass index (BMI) 29.72±5.26), 169 medial compartment knee OA cases (mean BMI 29.68±4.83) and 168 controls (mean BMI 26.87±4.2). Thirteen modes were derived for femur shape which described 95.5% of the total variance in proximal femur shape in the population. Modes 6, 8 and 12 were associated with prevalent lateral compartment knee OA. Medial compartment knee OA was associated with proximal femur modes 1, 5, 8, and 12. Conclusions: Prevalent lateral and medial compartment knee OA are associated with different ipsilateral proximal femur shapes. Additional studies are needed to better define how the shape of the proximal femur influences compartment-specific knee OA.

AB - Objective: This study examined the association of proximal femur shape with ipsilateral medial and lateral compartment knee osteoarthritis (OA). Design: Radiographs were obtained from the NIH-funded Osteoarthritis Initiative (OAI). Cases of isolated radiographic lateral compartment knee OA were defined on baseline radiographs as Kellgren/Lawrence (K/L) Grade≥2 and joint space narrowing (JSN)>0 in the lateral compartment and JSN=0 in the medial compartment; isolated medial compartment knee OA had K/L≥2 and JSN>0 medially with JSN=0 inthe lateral compartment. Controls had K/L<2 and JSN=0 in both compartments. Controls were frequency matched to cases by sex and 10-year age intervals. We characterized the shape of the proximal femurs on radiographs using Active Shape Modeling (ASM) and determined the association of proximal femur shape with knee OA using logistic regression. Results: There were 168 lateral compartment knee OA cases (mean body mass index (BMI) 29.72±5.26), 169 medial compartment knee OA cases (mean BMI 29.68±4.83) and 168 controls (mean BMI 26.87±4.2). Thirteen modes were derived for femur shape which described 95.5% of the total variance in proximal femur shape in the population. Modes 6, 8 and 12 were associated with prevalent lateral compartment knee OA. Medial compartment knee OA was associated with proximal femur modes 1, 5, 8, and 12. Conclusions: Prevalent lateral and medial compartment knee OA are associated with different ipsilateral proximal femur shapes. Additional studies are needed to better define how the shape of the proximal femur influences compartment-specific knee OA.

KW - Compartment

KW - Hip

KW - Knee

KW - Osteoarthritis

KW - Shape

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