Background: : The effects of long-term high-dose corticosteroids on bone mineral density (BMD) are clear, but the effects of low-dose corticosteroids in patients with rheumatoid arthritis (RA) remain controversial. The aim of this study was to assess the effects of low-dose corticosteroids on BMD in patients with RA.
Methods: : The authors surveyed randomized controlled studies that examined the effects of low-dose corticosteroids on BMD in patients with RA using MEDLINE and the Cochrane Controlled Trials Register and by performing manual searches. Data were collected on BMD (end-of-period or change-from-baseline) after longest recorded treatment durations. Meta-analysis was performed using a random effects model; outcomes are presented as standardized mean differences (SMDs).
Results: : Seven studies were included in this meta-analysis, which included 7 studies on lumbar BMD meta-analysis and 6 studies on femur BMD meta-analysis. Corticosteroids resulted in a moderate worsening in lumbar BMD compared with controls (SMD = -0.483; 95% confidence interval [CI], -0.815 to -0.151, P = 0.004), whereas the femoral BMD differences were not siginificant (SMD = -0.224; 95% CI, -0.663 to 0.215, P = 0.318). Subgroup analysis of BMD data performed on a change-from-baseline basis showed that corticosteroids had a clear effect on both lumbar and femoral BMDs (SMD = -0.354; 95% CI, -0.620 to -0.088, P = 0.009; SMD = -0.488; 95% CI, -0.911 to -0.065, P = 0.024, respectively).
Conclusions: : This meta-analysis shows BMD loss after low-dose corticosteroid treatment in patients with RA. These findings have practical implications for the long-term management of patients with RA on low-dose corticosteroids.
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