What is the IDACI?
The income deprivation affecting children index (IDACI) measures the proportion of all children aged 0 to 15 living in income deprived families in different local areas (called 'lower-layer super output areas', or LSOAs) across England. Each LSOA has on average 1,500 residents or 650 households.
Each LSOA gets an IDACI score of between 0 and 1 (for example, a score of 0.38 would mean that 38% of children aged 0 to 15 live in income deprived families in that area).
LSOAs are then ranked according to their levels of deprivation relative to that of other areas, with 1 being the most deprived. The rankings are divided into 7 'bands' (A to G), with LSOAs in band A being the most deprived (read more about the different bands below).
While the IDACI focuses on children aged 0 to 15 experiencing