Table 4. Adjusted ORs^* for driver responsibility linked to driving under the influence (n = 4,047^**, data source Voiesur 2011, fatal accidents).

	OR	95% CI
THC < 1 ng/l	1
1 ≤ THC < 3 ng/l	1.35	0.86–2.14
3 ≤ THC < 5 ng/l	3.59	1.36–9.48
THC ≥ 5 ng/l	1.59	0.85–2.97
All doses THC ≥ 1 ng/ml	1.65	1.16–2.34
ALC < 0.5 g/l	1
0.5 ≤ Alc <0.8 g/l	6.40	2.70–15.2
0.8 ≤ Alc < 1.2 g/l	8.30	4.52–15.2
1.2 ≤ Alc < 2 g/l	24.4	11.9–50.1
Alc ≥ 2 g/l	44.4	18.1–109
All doses ALC ≥ 0.5 g/l	17.8	12.1–26.1
OPI < 20 ng/ml	1
OPI ≥ 20 ng/ml	2.21	1.02–4.78

* Adjustment factors included in the model: age, gender, vehicle category, time of accident

** Known alcohol and narcotic status: responsibility determined by expert and age known (2,562 cases and 1,485 controls)