Lower limbs composition and radiographic knee osteoarthritis (RKOA) in Chingford sample--a longitudinal study.
Our aim in this longitudinal study was to evaluate to what extent fat and lean tissue mass variations are associated and can predict RKOA in a large sample of British women followed-up over 10 years. Kellgren/Lawrence (K/L), joint space narrowing (JSN) and osteophyte (OSP) grades were scored from radiographs of both knees in 909 middle-aged women from the Chingford registry. Body composition components were assessed using the dual energy X-ray absorptiometry (DXA) method. In cross-sectional analysis, combined effect of age, BMI and leg tissue composition was required for best fitting model explaining variations of K/L scoring and osteophytes at lateral compartment. To explain medial osteophytes, age and BMI were sufficient to generate the best fitting model. In prediction analysis, leg lean mass was the more powerful predictor of K/L, medial osteophytes than BMI. In conclusion, BMI appears to influence the development of knee OA through both fat and/or lean mass, depending on RKOA phenotype.
Human Population Biology Research Unit, Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
Orit
O
Blumenfeld
Frances M K
FM
Williams
Deborah J
DJ
Hart
Nigel K
NK
Arden
Timothy D
TD
Spector
Gregory
G
Livshits
D050153:Abdominal Fat / Q000033:anatomy & histology / Q000502:physiology; D000273:Adipose Tissue / Q000033:anatomy & histology / Q000502:physiology; D000367:Age Factors; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007866:Leg / Q000033:anatomy & histology* / Q000503:physiopathology; D008137:Longitudinal Studies; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging*; D054850:Osteophyte / Q000000981:diagnostic imaging; D011859:Radiography