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Energy expenditure and the body cell mass in Cystic Fibrosis

journal contribution
posted on 2001-01-01, 00:00 authored by R Shepherd, R Greer, Sarah McNaughtonSarah McNaughton, M Wotton, G Cleghorn
Poor nutritional status in patients with cystic fibrosis (CF) is associated with severe lung disease, and possible causative factors include inadequate intake, malabsorption, and increased energy requirements. Body cell mass (which can be quantified by measurement of total body potassium) provides an ideal standard for measurements of energy expenditure. The aim of this study was to compare resting energy expenditure (REE) in patients with CF with both predicted values and age-matched healthy children and to    determine whether REE was related to either nutritional status or pulmonary function. REE was measured by indirect calorimetry and body cell mass by scanning with total body potassium in 30 patients with CF (12 male, mean AGE = 13.07 ± 0.55 y) and 18 healthy children (six male, mean AGE = 12.56 ± 1.25 y). Nutritional status was expressed as a percentage of predicted total body potassium. Lung function was measured in the CF group by spirometry and expressed as the percentage of predicted forced expiratory volume in 1 s. Mean REE was significantly increased in the patients with CF compared with healthy children (119.3 ± 3.1% predicted versus 103.6 ± 5% predicted, P < 0.001) and, using multiple regression techniques, REE for total body potassium was significantly increased in patients with CF (P = 0.0001). There was no relation between REE and nutritional status or pulmonary disease status in the CF group. In conclusion, REE is increased in children and adolescents with CF but is not directly related to nutritional status or pulmonary disease.

History

Journal

Nutrition

Volume

17

Issue

1

Pagination

22 - 25

Publisher

Nutrition

Location

Burbank, Calif.

ISSN

0899-9007

eISSN

1873-1244

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2001, Elsevier Science Inc.