Three hundred and forty 5-year-old children from 18 state primary schools in Lambeth were examined as part of the BASCD oral epidemiological program in 2008. Data collection was undertaken between February and June 2008. Children were recruited from local public schools using a two-stage stratified sampling strategy. The dental examination was carried out by trained and calibrated examiners and recorded the children's experience of caries, their levels of oral hygiene and the presence of acute infection. Caries was diagnosed at the level of dentin involvement by visual inspection. No personal demographic data was recorded for the children, although parents and guardians were asked to provide the zip codes of the children's primary residences. The postcode of the public primary school was also recorded. The postcode of the child and school was used to identify the index of multiplied deprivation (IMD) score, the rank of the school attended by the child and the child's place of residence . In this study, it was hypothesized that children from more socio-economically deprived areas would have more experience of dental caries than children from less deprived areas, as measured by the IMD 2007. The IMD is a composite score derived from seven domains (income, employment, health, housing, education, local environment and crime measured using 38 different measures). Each area reflects a local population of 1,500 people. The calculation of the IMD 2007 is based on the Super Output Area (SOA), according to the Government Office for London 2007. There are six measures for the IMD at each level of local authority: average score, average rank, extent, local concentration. , income scale, employment scale. In this study, the measures used for...... middle of paper ......The scatterplot was prepared for the depravations variable and the components of the dmft(s). Then the correlation of this study was presented by Spearman to test the relationship between the continuous variables of oral health indices and area deprivation (Table 4.5) and there was no significant difference between the indices. Figure 4.4 Scatter plot between score and decayed areas. Table 4.5 presents the Spearman's correlations for the score and rank of the IMD and dental components.Spearman'sIMD Score P Value Spearman'sIMD Rank P ValueDS .039 0.607 -.039 .607DT .053 .484 -.053 . 484MS -.045 0.558 .045 . 558MT -.045 0.558 .045 .558FS .026 0.736 -.026 .736FT 008 917 -.008 .917DMFT -.004 .954 .004 .954