Table 2.

Summary of NCMP population and analysis sample

	Analysis sample	Non-responders from the NCMP population in the five included PCTs
Reception, n	1422	8068
Mean age, years (SD)	5.1 (0.31)	5.1 (0.34)
Female, %	49.0	47.9
White, %	57.8	49.0
Underweight: <2nd centile, %	0.8	1.1
Overweight: >85th centile, %	12.4	12.3
Very overweight: >95th centile, %	9.9	10.8
In most deprived IMD quintile, %	18.8	22.6
Year 6, n	1312	8394
Mean age, years (SD)	11.1 (0.32)	11.1 (0.34)
Female, %	52.3	48.5
White, %	67.4	59.7
Underweight: <2nd centile, %	1.5	1.7
Overweight: >85th centile, %	14.4	14.4
Very overweight: >95th centile, %	13.9	20.8
In most deprived IMD quintile, %	14.9	18.3

IMD = Index of Multiple Deprivation. NCMP = National Child Measurement Programme. PCT = primary care trust.