Figure 2.

Selection of respondents for analysis. The final datasets of respondents used for analyses was achieved after exclusion criteria were applied for younger age, not answering questions on seafood consumption or dental fillings, and removal of outlier values. CON: control; current: current dental fillings; former: former-only dental fillings; frequency: frequency of seafood consumption; mercury: mercury content of favourite fish; never: replied ‘never had any current or former mercury fillings’; outlier: extreme outliers (more than three times the inter-quartile range); M: male; F: Female.