“…Variables considered in the literature associated with As methylation were selected, namely gender, smoking habits, alcohol consumption and BMI [ 23 ]. We also included some variables that emerged as informative in a recent study performed using SEpiAs data [ 70 ], i.e., the area of residence, water consumption, exposure to chemical and physical agents, dietary habits and some gene polymorphisms ( Table 2 ). Particularly, the variables for which more than two exposure classes were defined in the questionnaire were dichotomized as described in the “Value” column in Table 2 (exposure: yes/no, consumption: yes/no).…”