Body composition in growth hormone deficient adults over the age of 60 years

Clinical Endocrinology
A A ToogoodStephen M Shalet

Abstract

Elderly patients with hypothalamic-pituitary disease exhibit a reduction in GH secretion distinct from the decline in GH secretion related to age. GH deficiency in young adults causes a change in body composition, with increased fat mass (FM) and reduced fat free mass (FFM), similar to that seen as a result of the normal ageing process. The aim of this study was to determine whether organic GH deficiency in elderly patients may cause changes in body composition beyond those due to ageing. Twenty-one patients (15 male) with documented pituitary disease and 24 controls (17 male) matched for age, height, weight and BMI, all over the age of 60, in whom GH status had been defined by a 24-hour GH profile and an arginine stimulation test. Serum was taken for fasting IGF-l and IGFBP-1 estimations. Total and regional FM and FFM were determined using dual-energy X-ray absorptiometry. FM (median (range)) was increased in the patients, 27.76 (19.25-50.24) vs 21.23 (8.81-49.15) kg in the controls (P < 0.005). FM was significantly increased in the arms, legs and trunk in the patients compared with the controls. The proportion of fat deposited centrally did not differ significantly between the two groups (57.0% (47.6-65.1) in the patients vs ...Continue Reading

Citations

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