Abstract:
:To update the British growth reference, anthropometric data for weight, height, body mass index (weight/height2) and head circumference from 17 distinct surveys representative of England, Scotland and Wales (37,700 children, age range 23 weeks gestation to 23 years) were analysed by maximum penalized likelihood using the LMS method. This estimates the measurement centiles in terms of three age-sex-specific cubic spline curves: the L curve (Box-Cox power to remove skewness), M curve (median) and S curve (coefficient of variation). A two-stage fitting procedure was developed to model the age trends in median weight and height, and simulation was used to estimate confidence intervals for the fitted centiles. The reference converts measurements to standard deviation scores (SDS) that are very close to Normally distributed - the means, medians and skewness for the four measurements are effectively zero overall, with standard deviations very close to one and only slight evidence of positive kurtosis beyond+/-2 SDS. The ability to express anthropometry as SDS greatly simplifies growth assessment.
journal_name
Stat Medjournal_title
Statistics in medicineauthors
Cole TJ,Freeman JV,Preece MAsubject
Has Abstractpub_date
1998-02-28 00:00:00pages
407-29issue
4eissn
0277-6715issn
1097-0258pii
10.1002/(SICI)1097-0258(19980228)17:4<407::AID-SIMjournal_volume
17pub_type
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