Table 1: Description of the contamination database (Unit: microgram per kilogram Table 2: Restricted maximum likelihood estimates (REML) for age and all socioeconomic variables and the p-value of the Student’s tests (Pval) 21 Mean Min Max Standard Deviation Number of analysis Fish 0.147 0.003 3.520 0.235 1350 Mollusk and Shellfish 0.014 0.001 0.172 0.011 1293 Effect Parameter REML Pval Income (ref: Mean sup) Well to do γ$_{1}$ 6.027 < 0.001 Mean inf γ$_{2}$ 2.686 < 0.001 Modest γ$_{3}$ -1.928 < 0.001 Region of residence (ref: Noncoastal regions) North, Brittany, Vendee coast γ$_{4}$ 0.962 0.003 South West coast γ$_{5}$ 5.232 < 0.001 Mediterranean coast γ$_{6}$ 2.303 < 0.001 Paris and its suburbs γ$_{7}$ 1.023 0.009 Occupation category of the principal household earner (ref: Blue collar workers) self-employed persons γ$_{8}$ -0.122 0.771 white collar workers γ$_{9}$ -3.733 < 0.001 retirees γ$_{10}$ -5.261 < 0.001 no activity γ$_{11}$ -1.910 0.004 Level of Education of the principal household earner (ref: BAC and higher degree) student γ$_{12}$ 5.901 < 0.001 no or weak diploma γ$_{13}$ -1.281 < 0.001 Figures and Tables