Evaluating the impacts of the demerit points system on traffic law violations and driver involvement in road accidents in Israel

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Table 6 Changes in severe accidents' indicators* between before and after periods

a—in the treatment-groups and comparison-groups of drivers
Treatment type	1—treatment-group, 0—comparison-group	Estimate: relation between accident indicators in before and after periods, in logarithmic-scale	St. Error	Adj P (Bonferroni)	Exp (Estimate)	Relative reduction in accident indicator between before and after periods, %
1	0	0.0005	0.0008	0.558	1.000	0.0
	1	0.0088	0.0013	< 0.0001	1.009	0.9
2	0	0.0008	0.0017	0.639	1.001	0.1
	1	0.0087	0.0027	0.001	1.009	0.9
3	0	−0.0001	0.0019	0.970	1.000	0.0
	1	0.0176	0.0030	< 0.0001	1.018	1.8
4	0	0.0007	0.0018	0.694	1.001	0.1
	1	0.0090	0.0028	0.001	1.009	0.9
5	0	0.0024	0.0011	0.028	1.002	0.2
	1	0.0076	0.0017	< 0.0001	1.008	0.8
6	0	0.0025	0.0022	0.253	1.003	0.2
	1	0.0146	0.0034	< 0.0001	1.015	1.5
7	0	0.0030	0.0023	0.193	1.003	0.3
	1	0.0168	0.0036	< 0.0001	1.017	1.7
8	0	0.0007	0.0022	0.737	1.001	0.1
	1	0.0141	0.0035	< 0.0001	1.014	1.4
All	0	0.0013	0.0008	0.113	1.001	0.1
	1	0.0122	0.0013	< 0.0001	1.012	1.2

b—in the treatment-groups vs. comparison-groups of drivers
Treatment type	Odds ratio estimate, in logarithmic-scale	St. Error	Adj P (Holm)	Exp(Odds ratio estimate)	Reduction in accident indicator between before and after periods, in treatment-group vs. comparison-group, %
1	0.008	0.001	< 0.0001	1.008	0.84
2	0.008	0.003	0.034	1.008	0.80
3	0.018	0.004	< 0.0001	1.018	1.78
4	0.008	0.003	0.034	1.008	0.84
5	0.005	0.002	0.034	1.005	0.52
6	0.012	0.004	0.012	1.012	1.22
7	0.014	0.004	0.007	1.014	1.39
8	0.013	0.004	0.007	1.013	1.34
All	0.011	0.002	< 0.0001	1.011	1.09