This report summarises the key findings from the Government's National Child Measurement Programme (NCMP).
The report provides high-level analysis of the prevalence of obese and overweight children, in reception (aged 4 to 5 years) and year 6 (aged 10 to 11 years), measured in the school year 2006/07.
When interpreting the results, it is important to consider the possible effects of participation rate on prevalence rates
Since the participation rate was less than 100 per cent, data will be missing for certain children. If these missing data were atypical, results could be biased For example, if children with higher BMI scores opted out of being measured, overweight and obese prevalence would be underestimated
Analysis later in the report shows that year 6 prevalence of obese and overweight may be slightly underestimated but that results for reception children are likely to be more robust.