Education-related inequalities are marked in Switzerland in men, and in Slovenia in women. On the other hand, the indexes of inequalities in men in Korea (by education level) and Chile (by SES) are near zero, indicating that no inequality is detected. Positive indexes are found in SES-related inequalities in men in Czech Republic and education-related inequalities in women in Korea. This indicates a reverse socioeconomic gradient: people at the bottom of the socioeconomic ladder are more likely to drink alcohol.