Serological markers of sarcopenia in ages 65 and over

Aim. To determine serological markers of sarcopenia (SP) for use in general medical practice in people aged 65 years and older living independently.Materials and methods. The study included 230 people aged 65 years and older (70 men and 160 women, median age 75 [68; 79] years) were consulted in a medical institution in St. Petersburg. The diagnosis of SP was made according to the criteria of EWGSOP2 (2018). The laboratory examination included clinical and biochemical blood analysis, determine the level of 25(OH)D, parathyroid hormone (PTH), C-reactive protein (CRP).Results. The risk of SP increased at levels 25(OH)D less than 21 ng/mL (odds ratio 4.989; 95 % confidence interval 1.321–12.626; р = 0.0420), total protein less than 65 g/l (OR 8.567; 95 % CI 2.658–27.617; р = 0.00032), serum CRP 6 mg/l or more (OR 14.279; 95 % CI: 3.511–58.071; р = 0.00020) and decrease in the estimated glomerular filtration rate (eGFR) less than 62 ml/min/1.73 m2 (OR 12.108; 95 % CI 3.944–37.170; р = 0.00001). Conclusion. Serological markers of SP, such as vitamin D, total protein, C-reactive protein in blood serum and eGFR can be used in general medical practice.