National Child Measurement Programme: Changes in children's body mass index between 2006/7 and 2014/15

Obesity prevalence shows a significant downward trend in both Reception boys and girls overall in the 2006/7 to 2014/15 period covered by the NCMP. The trends in obesity in Year 6 boys and girls continue to show year - on - year increases but the rates of increase are slowing down compared with data to 2013/14. Underweight prevalence has stabilised in Year 6 boys and girls and no longer shows a significant downward trend, though there is a significant small annual declining trend in underweight prevalence in Reception boys and girls. Analysis by Index of Multiple Deprivation (IMD) quintile continues to show a widening inequality gap in the overweight, obese and excess weight categories for Reception boys and girls and Year 6 boys and girls. Obesity and excess weight prevalence in Black Caribbean Reception boys are now showing significant annual declines, as is overweight prevalence in White British Reception boys. The upward trend in obesity prevalence in Indian Year 6 boys has become significant. Significant increases in mean BMI z-score over time in obesity and excess weight among Year 6 boys and girls indicate that the children in these weight categories are on average getting heavier (given their height) over time. Obese children living in more deprived areas are on average heavier, given their height, than obese children in less deprived areas. Analysis of repeat measured cohorts shows that the 2006/7 to 2012/13 NCMP cohort exhibits a lower relative increase in obesity prevalence from Reception to Year 6 than the two later repeating cohorts(2007/8 to 2013/14 and 2008/9 to 2014/15). The relative rates of obesity prevalence increase shown by the cohort year pairs are higher in more deprived IMD quintiles and in boys.  
Resource type: 
Crown Copyright