Medial versus lateral condyle bone mineral density ratios in a cross-sectional study: A potential marker for medial knee osteoarthritis severity
Arthritis Care & Research , 04/27/2012
Akamatsu Y et al. – Although this study was a cross–sectional study, the femoral and tibial medial versus lateral condyle bone mineral density (BMD) ratios increased with more severe knee pain and might be a potential marker for monitoring disease severity in women with symptomatic medial knee osteoarthritis (OA).Methods
- The authors enrolled 192 women (41–90 years) between April 2007 and March 2011.
- The subjects were divided into two groups according to joint space narrowing (JSN) on weight–bearing radiographs.
- BMD of the lumbar spine, proximal femur, and knee condyles was measured.
- Medial and lateral condyle BMDs of the femur and tibia as well as the medial versus lateral condyle BMD ratios were measured.
- Mean medial condyle BMDs, medial versus lateral condyle BMD ratios and VAS pain in both the femur and tibia were higher in the obliteration group compared with the narrowing group (p < 0.001 for all).
- A significant positive correlation was observed between the femoral and tibial condyles in the following parameters: medial condyle BMDs, lateral condyle BMDs, and medial versus lateral condyle BMD ratios (r = 0.791–0.844).
- In both the femur and tibia, medial versus lateral condyle BMD ratios had significant positive correlations with femorotibial angle, medial osteophytes, lateral osteophytes, medial JSN, and VAS pain, and had significant negative correlations with the Knee Society pain and function scores.