Study of risk factors for the osteoporosis development in rheumatoid arthritis in real clinical practice

Abstract

Introduction. Osteoporosis is a common complication of rheumatoid arthritis. Its development is associated with the mechanisms underlying in the progression of autoimmune inflammatory diseases and therapeutic approaches used for them. The study of risk factors for osteoporosis can contribute to the clarification of its pathogenesis components, as well as the development of new methods for prevention, diagnosis and treatment of this condition.Aim. To study the role of anamnestic, clinical and laboratory factors for secondary osteoporosis in women with rheumatoid arthritis.Materials and methods. 102 women with rheumatoid arthritis were enrolled in our study. Exclusion criterias were type 2 diabetes mellitus, hepatic cirrhosis, hepatocarcinoma and level of alanine aminotransferase ≥ than 3 upper limit ofnormal. The cumulative dose, duration and daily dose of glucocorticoids (GC) were determined by patient intake. All patients undergone standard clinical and immunological examination. Serum fetuin-A, 25-hydroxycalciferol, C-telopeptide of collagen I type, N-terminal propeptide of collagen I type levels were determined using ELISA. X-ray of afflicted joints and dual-energy x-ray absorptiometry were performed. Statistical analysis was performed using conventional methods. Forced data entry was used to perform multiple logistic regression. Hereinafter data is presented as odds ratio (OR) and 95% confirmation intervals (CI).Results. OR for osteoporosis were higher in women of age ≥ 58.5 years (OR 1,07 (1.02–1.12)), body mass index (BMI) ≤ 27 kg/m2 (OR 1.1 (1.01–1.2)), cumulative dose of GC ≥ 7.6 g (OR 1.09 (1.02–1.17), serum fetuin-A levels ≤ 660 μg/ml (OR 1,05 (1,01–1,09) and if the duration of GC intake is more than 3 months (hereinafter if dose of glucocorticoids is ≥ 5 mg for prednisolone daily) (OR 12.3 (4.12–36.5). Adjusted OR for osteoporosis were higher in women of age ≥ 58.5 years old (adjOR 1.08 (1.01–1.16), serum fetuin-A levels ≤ 660 μg/ml (adjOR 1.08 (1.01–1.15) andif the duration of GC intake is ≥ than 3 months (adjOR 12.1 (1.44–102.3).Conclusions. Women with RA of ≥ than 58.5 years old, duration of GCs intake more than 3 months and serum fetuin-A levels ≤ than 660 μg/ml had higher odds for osteoporosis.These are independent factors for osteoporosis in women with rheumatoid arthritis, whichshould be used in patient’s management.