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Peter Bundred a University of Liverpool, Liverpool L69 3GB, b Royal
Liverpool Children's NHS Trust, Liverpool L12 7AP, c West
Hertfordshire Health Authority, St Albans, Hertfordshire AL1
3ER
Correspondence to: P Bundred peterb{at}liv.ac.uk
Objective:
To determine trends in weight, height, and body mass index in children between 1989 and 1998.
Design:
Retrospective series of cross sectional
studies of routinely collected data.
Setting:
Primary care in the Wirral Health Authority.
Participants:
35 662 infants aged 1-3 months
(representing 88% of live births) and 28 768 children aged 2.9-4.0 years. 21 582 infants and children (25.1%) were excluded because of
missing or inaccurate data.
Main outcome measures:
Weight, height, sex, and age
routinely recorded by health visitors. Height, weight, and body mass
index standardised for age and sex. SD score >1.04 for body mass index
(>85th centile) was defined as overweight and >1.64 (>95th centile)
as obese. Body mass index was not calculated in infants as it is
difficult to interpret.
Results:
From 1989 to 1998 there was a highly
significant increasing trend in the proportion of overweight children
(14.7% to 23.6%; P<0.001) and obese children (5.4% to 9.2%;
P<0.001). There was also a highly significant increasing trend in the
mean SD score for weight (0.05 to 0.29; P<0.001) and body mass index (
0.15 to 0.31; P<0.001) but not height. Infants showed a small but
significantly increasing trend in mean SD score for weight (
0.17 to
0.05; P=0.005).
Conclusions:
From 1989 to 1998 there was a highly
significant increase in weight and body mass index in children under 4 years of age. Routinely collected data are valuable in identifying
anthropometric trends in populations.
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