Changes to the NCMP: trends in child BMI deprivation allocation method
Updated 21 April 2021
Applies to England
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New method
For the 2021 publication of the updated trends in child body mass index (BMI) report, the allocation of a data record to a deprivation quintile or deprivation decile uses the version of the Index of Multiple Deprivation (IMD) which most closely aligns with the time period of data. The table below shows the IMD version that has been assigned to each National Child Measurement Programme (NCMP) year from 2013 to 2014 up to 2019 to 2020 in this new report and previous versions.
Table 1: NCMP year by version of IMD applied
| NCMP year | IMD version used in 2021 report | IMD version used in previous reports |
|---|---|---|
| 2006 to 2007 2007 to 2008 2008 to 2009 2009 to 2010 |
IMD 2007 | IMD 2007 |
| 2010 to 2011 2011 to 2012 2012 to 2013 |
IMD 2010 | IMD 2010 |
| 2013 to 2014 2014 to 2015 |
IMD 2015 | IMD 2010 |
| 2015 to 2016 | IMD 2015 | IMD 2015 |
| 2016 to 2017 2017 to 2018 2018 to 2019 |
IMD 2019 | IMD 2015 |
| 2019 to 2020 | IMD 2019 | N/A |
More information about the IMD can be found on GOV.UK.
Reason for change
The change has been made to align with the analytical approach for assigning IMD applied within Public Health England (PHE).