Table 2

Correlations between KS deciles

KS1KS2KS3KS4
KS11
KS20.78 (0.78 to 0.79)1
KS30.67 (0.65 to 0.68)0.81 (0.81 to 0.82)1
KS40.63 (0.61 to 0.64)0.73 (0.72 to 0.74)0.73 (0.72 to 0.74)1
  • Numbers are correlation coefficients (95% CI).

  • All p values <0.001.

  • KS, Key Stage.