RT Journal Article SR Electronic T1 Growth of primary school children: a validation of the 1990 references and their use in growth monitoring JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 298 OP 301 DO 10.1136/adc.83.4.298 VO 83 IS 4 A1 Mary C J Rudolf A1 Tim J Cole A1 Aaron J Krom A1 Pinki Sahota A1 Jenny Walker YR 2000 UL http://adc.bmj.com/content/83/4/298.abstract AB AIMS To determine whether the British 1990 growth charts are valid for cross sectional and longitudinal use in primary school children.METHODS A total of 694 children aged 7–10 years from 10 Leeds primary schools were weighed and measured annually over three years by an expert auxologist. SD scores were calculated using both the Tanner–Whitehouse (TW) and the revised British 1990 growth references.RESULTS The growth of this sample of children approximated the 1990 growth reference, with mean (SD) scores for height 0.12 (1.01), weight 0.20 (1.07), and body mass index (BMI) 0.19 (1.12). By comparison, the TW standards exaggerated the height and weight centiles. There was minimal channel crossing for height in either direction with 1.0% crossing up at least one channel width (0.67 SDscores), and 0.2% down for height. However, there was clear evidence of weight and particularly BMI increasing with age between and within subjects, at rates of up to 0.1 SDscores per year.CONCLUSIONS This study supports the adoption of the new growth references, and their use longitudinally for height monitoring. It also highlights the increasing weight of the school age population as a public health issue.