Therefore, further analyses were undertaken using indexes of inequalities which overcome, at least in part, the problems just described. Disparities in drinking patterns related to education level and the socioeconomic status are assessed and gauged using the concentration index (Cl). This study uses the corrected Cl proposed by Wagstaff (2005) in order to take into account the bounded nature of the health outcome (e.g. probability of being alcohol consumer). The Cl is bounded between -1 and 1, with the sign indicating the direction of inequality -a positive index indicates that the well-off are less likely to be alcohol consumers (or hazardous or heavy episodic drinkers)9, a zero value indicates no inequality, and a negative index indicates that the well-off are more likely to be alcohol consumers (or hazardous or heavy episodic drinkers)10.