dropouts failure success Chi square test marital status single 10 36 102 ns married/ couple 17 34 72 social classes medium 3 10 28 ns high 24 60 146 educational level high school graduate 17 47 141 0,020 university 10 23 33 tobacco consumption yes 5 14 36 ns no 22 56 138 Alcoholconsumption yes 15 52 102 ns no 12 18 72

Table 1: Distribution of success and failure in regard of marital status, social classes, educational level and consumption of alcohol and tobacco.