Abstract
To assess the efficacy of long-term calcium and vitamin D treatment on bone mineral density (BMD) in HIV+ patients on combined antiretroviral therapy (cART). A retrospective, single-center cohort study. Between March 2010 and July 2012, 268 HIV+ patients were screened for vitamin D and calcium deficiency. Those with proven vitamin D or calcium deficiency received supplementation according to a predefined protocol, and were offered further evaluation of BMD by dual-energy X-ray absorptiometry (DEXA). Calcium and vitamin D status and BMD were assessed at baseline (T0) and approximately one (T1) and 4–6 years (T2) later. Percentual change in BMD of the lumbar spine and hip was compared with reported rates of change in HIV+ patients on cART without standard calcium and vitamin D treatment. The prevalence of vitamin D deficiency and calcium deficiency was 46% and 43%, respectively. Thirteen percent of patients had secondary hyperparathyroidism at baseline. DEXA performed in patients with a deficiency revealed osteopenia in 40% and osteoporosis in 8% of patients. The expected long-term change in lumbar spine and hip BMDs at T2 was −0.7%, −1.5%, and −1.5%, respectively. The measured changes were +2.3%, −0.6%, and −0.6%, respectively. The difference between measured and expected rate of change was significant for the lumbar spine (3.0%, p < .05), but not for the hip. Long-term vitamin D and calcium supplementation improves lumbar spine BMD of HIV+ patients with osteopenia or osteoporosis and with proven calcium and/or vitamin D deficiencies. Screening and treatment are recommended to become part of regular care.
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