Madhusmita Misra1, Marie Le Clair2, Nara Mendes2, Karen K Miller2, Elizabeth Lawson2, Erinne Meenaghan2, Thomas Weigel3, Seda Ebrahimi4, David B Herzog5, Anne Klibanski2. 1. Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114 ; Pediatric Endocrine Unit, Mass General Hospital for Children and Harvard Medical School, Boston, MA 02114. 2. Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114. 3. Klarman Center, McLean Hospital, Belmont, MA 02478. 4. Cambridge Eating Disorders Center, Cambridge, MA 02138. 5. Harris Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114.
Abstract
OBJECTIVES: Alterations in serotonin impact bone metabolism in animal models, and selective serotonin reuptake inhibitors (SSRI) have been associated with increased fracture risk in older adults. SSRIs are commonly used in anorexia nervosa (AN), a condition that predisposes to low bone mineral density (BMD). Our objective was to determine whether SSRI use is associated with low BMD in AN. METHODS: We examined Z-scores for spine, hip and whole body (WB) BMD, spine bone mineral apparent density and WBBMC/height (Ht) in females with AN 12-21 years old who had never been on SSRIs, on SSRIs for <6 months (<6M) or >6 months (>6M). RESULTS: Subjects on SSRIs for >6M had lower spine, femoral-neck and WBBMD Z-scores than those on SSRIs for <6M. Hip BMD and WBBMC/Ht Z-scores were lowest in subjects on SSRIs for >6M. Duration of SSRI use, duration since AN diagnosis and duration of amenorrhea inversely predicted BMD, whereas BMI was a positive predictor. In a regression model, duration of SSRI use remained an independent negative predictor of BMD. DISCUSSION: Duration of SSRI use >6M is associated with low BMD in AN. CONCLUSION: It may be necessary to monitor BMD more rigorously when duration of SSRI use exceeds 6M.
OBJECTIVES: Alterations in serotonin impact bone metabolism in animal models, and selective serotonin reuptake inhibitors (SSRI) have been associated with increased fracture risk in older adults. SSRIs are commonly used in anorexia nervosa (AN), a condition that predisposes to low bone mineral density (BMD). Our objective was to determine whether SSRI use is associated with low BMD in AN. METHODS: We examined Z-scores for spine, hip and whole body (WB) BMD, spine bone mineral apparent density and WBBMC/height (Ht) in females with AN 12-21 years old who had never been on SSRIs, on SSRIs for <6 months (<6M) or >6 months (>6M). RESULTS: Subjects on SSRIs for >6M had lower spine, femoral-neck and WBBMD Z-scores than those on SSRIs for <6M. Hip BMD and WBBMC/Ht Z-scores were lowest in subjects on SSRIs for >6M. Duration of SSRI use, duration since AN diagnosis and duration of amenorrhea inversely predicted BMD, whereas BMI was a positive predictor. In a regression model, duration of SSRI use remained an independent negative predictor of BMD. DISCUSSION: Duration of SSRI use >6M is associated with low BMD in AN. CONCLUSION: It may be necessary to monitor BMD more rigorously when duration of SSRI use exceeds 6M.
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