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Postnatal factors associated with failure to thrive in term infants in the Avon Longitudinal Study of Parents and Children

¹ Centre for Child and Adolescent Health, Department of Community-Based Medicine, University of Bristol, Bristol, UK
² Department of Psychology, University of Durham, Durham, UK
³ Department of Clinical Sciences (South), University of Bristol, Bristol, UK
⁴ Department of Social Medicine, University of Bristol, Bristol, UK

Correspondence to:
Correspondence to:
Professor A Emond
Centre for Child and Adolescent Health, Hampton House, Bristol BS6 6JS, UK; alan.emond{at}bristol.ac.uk

Objective: To assess the contribution of postnatal factors to failure to thrive in infancy.

Methods: 11 900 infants from the Avon Longitudinal Study of Parents and Children (ALSPAC), born at 37–41 weeks’ gestation, without major malformations and with a complete set of weight measurements in infancy (83% of the original ALSPAC birth cohort) were studied. Conditional weight gain was calculated for the periods from birth to 8 weeks and 8 weeks to 9 months. Cases of growth faltering were defined as those infants with a conditional weight gain below the 5th centile.

Results: Analysis yielded 528 cases of growth faltering from birth to 8 weeks and 495 cases from 8 weeks to 9 months. In multivariable analysis, maternal factors predicting poor infant growth were height <160 cm and age >32 years. Growth faltering between birth and 8 weeks was associated with infant sucking problems regardless of the type of milk, and with infant illness. After 8 weeks of age, the most important postnatal influences on growth were the efficiency of feeding, the ability to successfully take solids and the duration of breast feeding.

Conclusions: The most important postnatal factors associated with growth faltering are the type and efficiency of feeding: no associations were found with social class or parental education. In the first 8 weeks of life, weak sucking is the most important symptom for both breastfed and bottle-fed babies. After 8 weeks, the duration of breast feeding, the quantity of milk taken and difficulties in weaning are the most important influences.

Abbreviations: ALSPAC, Avon Longitudinal Study of Parents and Children; FTT, failure to thrive

Relevant Article

A brief digest of the February issue
Arch. Dis. Child. 2007 92: e2. [Extract] [Full Text] [PDF]

This article has been cited by other articles:

				A. M. Emond, P. S. Blair, P. M. Emmett, and R. F. Drewett Weight Faltering in Infancy and IQ Levels at 8 Years in the Avon Longitudinal Study of Parents and Children Pediatrics, October 1, 2007; 120(4): e1051 - e1058. [Abstract] [Full Text] [PDF]

				L. Secco, A. Walsh, and M. MacLellan Weak infant sucking in the first 8 weeks, reliance on breastfeeding for >=9 months, small feeds, and difficulties in weaning were associated with failure to thrive Evid. Based Nurs., July 1, 2007; 10(3): 90 - 90. [Full Text] [PDF]