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Erschienen in:
05.11.2019 | Original Article
Prevalence and risk factors associated with vertebral osteoporotic fractures in patients with rheumatoid arthritis
Erschienen in: Clinical Rheumatology | Ausgabe 2/2020
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Objectives
To explore the prevalence and risk factors of osteoporosis (OP) and vertebral osteoporotic fracture (VOPF) in patients with rheumatoid arthritis (RA).
Methods
Anteroposterior and lateral X-ray examination of the vertebral column (T4-L4) was used for the semi-quantitative assessment of VOPF. Bone mineral density was measured by dual-energy X-ray absorptiometry.
Results
Of 865 RA patients, the prevalence of OP and VOPF was 33.6% and 20.2%, respectively. Patients with OP or VOPF were older, and had longer term use and a larger daily amount and cumulative dose of glucocorticoids (GCs), longer disease duration, and higher Health Assessment Questionnaire (HAQ) scores and Sharp scores than patients without OP or VOPF (P < 0.05). OP was also correlated with higher disease activity. The patients treated with GCs had higher incidences of OP and VOPF than the patients without GCs (P < 0.05). The cutoff values in the area under curve (AUC) of the daily dose or treatment course of GCs-VOPF were 9 mg and 37.5 days. Older age, female sex, and a higher Sharp score were risk factors for OP in RA patients, while higher BMI was a protective factor. Older age and a high GC daily dose were risk factors for VOPF in RA patients.
Conclusions
RA patients have a high prevalence of OP and VOPF. Older age, female sex, lower BMI, and higher activity and severity of RA are closely related with OP. Older age and a higher GC daily dose are risk factors for VOPF in RA patients.
Key Points
• Older age, female sex, lower BMI, and a higher Sharp score were risk factors for OP in RA patients.
• Older age and a high GC daily dose were risk factors for VOPF in RA patients.
• OP and VOPF in RA patients were correlated with longer disease duration and higher severity of RA.
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