Bone mass and anthropometry in patients with osteoarthritis of the foot and ankle.
BACKGROUND
Patients with hip and knee osteoarthritis (OA) have high bone mineral density (BMD) and high BMI. If the same accounts for patients with foot or ankle OA is unknown.


METHODS
We measured BMD and femoral neck (FN) width by dual-energy X-ray absorptiometry in 42 women and 19 men with idiopathic OA in the foot or ankle, and in 99 women and 82 men as controls.


RESULTS
Women with OA had significant higher BMI than controls. Women with OA had higher BMI-adjusted BMD (p<0.01) and smaller BMI-adjusted FN width (p<0.01) than controls. Men with OA had higher BMI adjusted-BMD (p<0.05) and smaller BMI-adjusted FN width (p<0.01) than controls.


CONCLUSIONS
Patients with OA in the foot or ankle have higher BMD and smaller bone size than being expected by their BMI. This phenotype may provide unfavourable forces across the joint and is hypothetically important for development of OA.
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö; Department of Orthopedics, Kalmar Hospital, Kalmar, Sweden. Electronic address: maria.coster@med.lu.se.
M C
MC
Cöster
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö
B E
BE
Rosengren
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö
C
C
Karlsson
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö
T
T
von Schevelow
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö
H
H
Magnusson
Department of Orthopedics, Kalmar Hospital, Kalmar, Sweden.
L
L
Brudin
Department of Orthopedics and Clinical Sciences, Lund University, Skåne University Hospital, Malmö
M K
MK
Karlsson
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000843:Ankle Joint / Q000000981:diagnostic imaging*; D015992:Body Mass Index; D015519:Bone Density; D005260:Female; D033023:Foot Joints / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography
Ankle; Anthropometry; BMD; BMI; Bone mineral density; Bone size; Foot; Osteoarthritis