title: The relationship between knee osteoarthritis and osteoporosis.
abstract: OBJECTIVE
  The aim of this study was to investigate the association between knee osteoarthritis (OA) and bone mineral density (BMD) in the femur and lumbar vertebrae.
  
  
  METHODS
  A total of 74 female patients (mean age 61.9 ±9.1 years, mean body mass index 27.09±4.24) diagnosed with knee OA were included in this study. To assess knee OA, bilateral weight-bearing antero-posterior knee radiographs were taken and graded from 0 to 4 according to Kellgren-Lawrence criteria. The BMD of the subjects was measured using dual-energy X-ray absorptiometry (DEXA). BMD measurements of those with OA were compared with those without OA.
  
  
  RESULTS
  While there was no correlation between BMD and the grade of knee OA, a significant negative correlation was found between age and femur BMD. Body mass index was positively correlated with OA and negatively correlated with OP.
  
  
  CONCLUSIONS
  Further investigations are needed to demonstrate the association between knee OA and BMD.
authors.affiliation: Department of Rheumatology, Antalya Education and Training Hospital, Antalya, Turkey.
authors.forename: Ilhan
authors.initials: I
authors.lastname: Sezer
authors.affiliation: Physical Medicine and Rehabilitation, Gumushane State Hospital, Gumushane, Turkey.
authors.forename: Ozge G
authors.initials: OG
authors.lastname: Illeez
authors.affiliation: Physical Medicine and Rehabilitation, Ozel Medisu Hospital, Antalya, Turkey.
authors.forename: Serpil D
authors.initials: SD
authors.lastname: Tuna
authors.affiliation: Physical Medicine and Rehabilitation, Faculty of Medicine, Akdeniz University, Antalya, Turkey.
authors.forename: Nilufer
authors.initials: N
authors.lastname: Balci
keywords: Bone mineral density; Knee osteoarthritis; Osteoarthritis; Osteoporosis