Table 1
Proportion of missing data by year
Proportion of missing data (%)
Year
2004
2005
2006
2007
Age
0.41
0.15
0.10
0.13
Sex
1.07
0.70
0.25
0.20
IMD
1.76
1.63
1.44
1.44
IMD, index of multiple deprivation.