As for the use illicit substance/s, we found that 75% female and 53% male students never used illicit substance, comparable to levels in the USA where 65.5% of the students reported they never used marijuana (44). In contrast, our rates of regular or little (few times) use of illicit substance/s were in 25% of females and 47% of males. Given the methodological differences of the measurement of ‘drug’ use that was employed in published studies, as well as the type of elicit substance that different studies examined i college student populations, comparison of our results with other studies is not a straight forward task. For instance, employing USA estimates, about one in three college students in 1980–81 was a current marijuana user, which then dropped by more than a half (