Indicators of mineral bone density in male patients with osteoarthritis of knee joint of elderly and old age depending on condition of muscular system

Abstract

Objective. To evaluate bone mineral density (BMD) indices in elderly and old age male patients with knee osteoarthritis (OA) depending on the state of the muscular system.Subjects and methods. The trial enrolled 32 patients with knee OA. The mean age of the patients was 68.7 (66.1; 70.3) years. The diagnosis of knee OA was established according to the diagnostic criteria of the American College of Rheumatologists (ACR, 1991). For comparative analysis, all patients with knee OA were divided into 3 groups according to muscle condition (EWGSOP, 2010: muscle mass was assessed by multispiral computed tomography, muscle strength was measured using a wrist dynamometer, muscle function was examined using a battery of short tests): the 1st – 9 patients without sarcopenia, the 2nd – 11 patients with presarcopenia, and the 3rd – 12 patients with sarcopenia. BMD was assessed by dual-energy X-ray absorptiometry in the neck and proximal femur as a whole and in the lumbar spine.Results. Osteopenic syndrome in the study cohort was diagnosed in 23 (71,9%) patients: osteopenia – in 19 (59,4%) patients, osteoporosis – in 4 (12,5%). Normal BMD values were observed in 9 (28.1%) patients. Osteopenic syndrome was detected in patients with sarcopenia signifcantly more often compared to patients without sarcopenia (p > 0.05) and with presarcopenia (p = 0.05). BMD indices in patients with sarcopenia in the neck and proximal femur in general were statistically signifcantly lower than in patients without sarcopenia and with presarcopenia (p < 0.05). There was a direct correlation between total skeletal muscle area at the LIII level and densitometric indices of the femoral neck.Conclusions. Sarcopenia is associated with low BMD indices in the neck and proximal femur in general in elderly and senile male patients with knee OA