it was found that those applicants who grew and developed in unfavorable conditions , i. e. under the influence of risk factors which include young age to start smoking , nervous shocks in childhood and adolescence , unstable family relations , alcoholic parents , etc. , failed and were expelled from the school due to different reasons in a greater number of cases ( p less than 0.01 ) .
C0231335
childhood
C0001578
adolescence