Long-Term Outcomes of Conventional And Novel Steroid Replacement Therapy On Bone Health In Primary Adrenal Insufficiency
Abstract Purpose: To compare dual-release hydrocortisone (DR-HC) and conventional glucocorticoids (GCs) on bone metabolism in patients with primary adrenal insufficiency (PAI).Methods: Thirty-five patients with PAI maintained conventional GCs (group A), while other 35 were switched to DR-HC (group B). At baseline and after 18, 36 and 60 months of conventional GCs and DR-HC treatment, the clinical and bone metabolic parameters were evaluated. Results: After 60 months of follow-up, patients in group A had a significant increase in Body Mass Index (BMI) (p=0.004) and Waist Circumference (WC) (p=0.026) and a significant decrease in osteocalcin (p=0.002), bone alkaline phosphatase (p=0.029), lumbar spine bone mass density (BMD) T and Z scores (p<0.001 and p=0.001, respectively) than baseline. By contrast, patients in group B had a significant decrease in WC (p=0.047) and increase in bone alkaline phosphatase (p=0.019), lumbar spine BMD T score (p=0.032), femoral neck BMD T and Z scores (p=0.023 and p=0.036, respectively) than baseline. Conclusions: Long-term conventional steroid replacement therapy is associated with a decrease in BMD, notably at lumbar spine, and an increase in vertebral fractures rate. By contrast, DR-HC treatment is associated with improvement of BMD.