Investigation of Osteopaenia in Anorexia Nervosa

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Abstract
Sixty-nine female patients, mean age 27.5 years (range 20-40), with a past or current history of anorexia nervosa (DSM Ill-R) had spinal trabecular bone density assessed by single energy quantitative CT scan. Current exercise and dietary calcium levels were assessed by detailed questionnaires and categorized. A semi-structured interview was used to record weight, menstruation, exercise and dietary calcium intake histories from early adolescence. Serum sex hormones and total calcium assays were measured. Bone density was significantly lower in the patients compared to 31 controls. Bone density was significantly positively correlated with body mass index, and negatively correlated with illness duration and duration of amenorrhoea. Exercise levels, dietary calcium intake and taking an oestrogen pill did not correlate significantly with bone density. Recovered patients did not have osteopaenia but they had shorter illness histories than non-recovered patients. Management to minimise bone loss should focus on weight gain and resumption of normal menstruation.

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