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Age and Ageing Advance Access originally published online on November 29, 2004
Age and Ageing 2005 34(2):120-124; doi:10.1093/ageing/afh242
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Age and Ageing Vol. 34 No. 2 © British Geriatrics Society 2005; all rights reserved

Research Paper

Fibre-supplemented tube feeding in the hospitalised elderly

Maurits F. J. Vandewoude, Kathleen M. J. Paridaens, Raymonda A. L. Suy, Mireille A. A. Boone and Heidi Strobbe

UCG (Universitair Centrum Geriatrie), ZNA, Campus Elisabeth, Leopoldstraat 26, 2000, Antwerpen, Belgium

Address correspondence to: M. F. J. Vandewoude, Floralienlaan 38, 2600 Berchem, Belgium. Email: maurits.vandewoude{at}ua.ac.be

Abstract

Objectives: to evaluate the effect of fibre supplementation in enteral feeding on bowel function in hospitalised geriatric patients, and to assess its metabolic and nutritional efficiency.

Design: prospective randomised controlled trial with stratification for diabetes.

Setting: Department of Geriatrics at the University of Antwerp.

Subjects: during 30 months (January 2000–June 2002) every hospitalised patient requiring tube feeding was assessed for eligibility (n = 183). Finally 172 patients (19% diabetics) were randomised.

Methods: an enteral nutritional regimen consisting of 30 kcal/kg in 2000 ml with a calorie/nitrogen ratio of 156 with or without fibre was instituted. At weekly intervals, stool output was qualitatively evaluated by recording frequency, volume (small <1/2 cup, large >1/2 cup) and consistency (solid-formed, soft-pasty or liquid-watery). Nutritional and metabolic effects were evaluated through laboratory analysis.

Results: overall mortality was 24% with a trend for excess mortality in diabetic patients (33.3% versus 21.6% in non-diabetics; P = 0.176). There was no difference in duration of feeding between the fibre group (27.5 days; 95% CI = 19.1–35.9) and the no fibre group (27.9 days; 95% CI = 20.2–35.5). In the fibre-supplemented group, stool frequency was lower (4.1 per week; 95% CI = 3.7–4.6) than in controls (6.3 per week; 95% CI = 5.6–6.9). Qualitatively, stool consistency was higher (P < 0.001) but no difference in volume was noted. There were no differences in final laboratory parameters between groups.

Conclusions: fibre supplementation improved bowel function with reduced stool frequency and more solid stool consistency. It did not affect the nutritional efficiency of enteral feeding in hospitalised geriatric patients. Diabetes may be a risk factor for mortality in malnourished patients requiring tube feeding.

Keywords: fibre, elderly, tube feeding, enteral nutrition, bowel function

Received May 9, 2004; Revision received September 15, 2004. accepted in revised form September 15, 2004.


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