Prediction of lung function in the inadequately nourished
a Centre for Research
into Human Development, Department of Child Health, University of
Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK, b Department of Epidemiology and Public Health,
University of Dundee
Correspondence to: Dr Mukhopadhyay.
Accepted 11 February 1998
BACKGROUND
In animal
models, nutritional deficiency leads to profound qualitative changes in
the lung beyond an effect on organ size. Although lung growth is
non-isotropic, predictive values for spirometric lung function in
children are corrected for height alone. Prediction of lung function
should consider isotropic growth and nutritional status concurrently.
AIM
To establish
whether nutritional status influences lung function following the
exclusion of the effect of isotropic growth.
METHODS
Nutritional
status (weight, body mass index, mid-upper arm circumference, and
subscapular and triceps skinfold thicknesses) was assessed, and lung
function (forced vital capacity (FVC), forced expiratory volume in one
second (FEV1), and peak expiratory flow rate (PEFR)) was
measured in 391 healthy school age children with normal respiratory
history and examination in a rural setting in West Bengal, India.
RESULTS
Lung function
normalised for sitting height and stature correlated significantly with
indices of nutrition in both sexes. Adding weight as an independent
variable to sitting height, new reference prediction equations for
FEV1, FVC, and PEFR were calculated.
CONCLUSIONS
Nutritional
differences influence qualitative aspects of lung development in
childhood beyond simple isotropic lung growth. Prediction of lung
function must take account of these differences if change as a result
of disease is to be accurately measured. The
identification and correction of relevant dietary deficiencies might
help to improve lung function in children.
© 1998 by Archives of Disease in Childhood
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