Vitamin D deficiency in systemic lupus erythematosus: prevalence, predictors and clinical consequences

Rheumatology
Guillermo Ruiz-IrastorzaC Aguirre

Abstract

We aimed to establish the prevalence, predictors and clinical consequences of vitamin D deficiency in patients with SLE. Cross-sectional study including patients fulfilling ACR criteria for the classification of SLE. Serum 25(OH)D levels at 30 and 10 ng/ml were the cut-off values for vitamin D insufficiency and vitamin D deficiency, respectively. SLE activity was measured by SLEDAI and irreversible organ damage by the SLICC-ACR index. Fatigue was quantified using a 0-10 visual analogue scale (VAS). Ninety-two patients (90% women, 98% white) were included in the study. Sixty-nine (75%) and 14 (15%) patients presented with vitamin D insufficiency and deficiency, respectively. Female sex (P = 0.001), treatment with HCQ (P = 0.014) and treatment with calcium and vitamin D (P = 0.049) predicted higher levels of 25(OH)D. Photosensitivity [odds ratio (OR) 3.5] and photoprotection (OR 5.7) predicted vitamin D insufficiency and deficiency, respectively. Higher age (OR 0.95) and HCQ use (OR 0.29) protected against vitamin D deficiency. Patients with vitamin D deficiency had a higher degree of fatigue as quantified by a 0-10 VAS (mean 5.32 vs 4.03, P = 0.08). No relation was seen between vitamin D insufficiency or deficiency and disease d...Continue Reading

Citations

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