Applying stepwise logistic regression analysis, in the third column of Table 2, the results broadly agree with above findings using chi-square test and reviewing the corresponding group-specific severe accident proportions. Referring to the odds ratios and 95% CI in Table 2 (third column), male traffic offenders are more likely to be involved in fatal/serious accidents. Regarding driving experience, novice drivers (≦2 years of driving experience) exhibit a lower risk of being involved in severe accidents.