Osteoporosis and Osteopenia in patients with psoriatic arthritis: a single-center retrospective study.

OBJECTIVE: It is known that fracture risk is increased in patients with psoriatic arthritis (PsA), however, there is no consensus on the association with osteoporosis. The purpose of this study was to elicit the rate of osteoporosis and the risk factors of osteoporosis in patients with PsA at our institution.

METHODS: The data in this study were extracted from 163 patients with PsA. Osteoporosis and osteopenia were defined based on the WHO definition. Osteoporosis was also diagnosed when a fragility vertebral compression fracture was observed.

RESULTS: The osteoporosis and osteopenia rates for PsA patients were 11.7% and 33.1%, respectively. The rates of osteoporosis and osteopenia in males were particularly high compared to previous reports, at 9.3% and 34.3%, respectively. Trabecular bone score (TBS) was considered age-appropriate for both males and females. Body mass index (BMI) and TBS were significantly lower in patients with osteoporosis.

CONCLUSIONS: In patients with PsA, males are at elevated risk of osteoporosis and associated fragility fractures even if they are under 50 years old. BMI was significantly lower in osteoporotic cases, suggesting the importance of bone mineral density testing and treatment in such cases.