Table 3 The interrupted time series analysis for absolute poisoning numbers due to drugs, opioids, stimulants, and cannabis.

Variable	Coefficient	Standard error	p-value	95% CI
Drugs
Constant	77.481	1.579	< 0.001	74.299 to 80.662
Slope before	0.397	0.114	0.001	− 40.598 to − 3.562
Level change	− 22.08	9.188	0.021	− 40.598 to − 3.562
Slope change	1.234	0.655	0.066	− 0.086 to 2.556
Slope after	1.631	0.648	0.016	0.324 to 2.938
Opioids
Constant	113.987	6.066	< 0.001	101.761 to 126.213
Slope before	0.064	0.352	0.856	− 0.645 to 0.774
Level change	− 49.04	9.741	< 0.001	− 68.671 to − 29.41
Slope change	1.467	0.508	0.006	0.443 to 2.492
Slope after	1.532	0.408	< 0.001	0.71 to 2.354
Stimulants
Constant	10.818	2.123	< 0.001	6.537 to 15.098
Slope before	0.371	0.119	0.003	0.131 to 0.612
Level change	− 7.962	2.985	0.011	− 13.978 to − 1.945
Slope change	− 0.249	0.215	0.252	− 0.684 to 0.184
Slope after	0.122	0.18	0.502	− 0.241 to 0.484
Cannabis
Constant	5.519	2.128	0.013	1.23 to 9.809
Slope before	0.579	0.168	0.001	0.240 to 0.918
Level change	− 10.041	3.521	0.007	− 17.137 to − 2.944
Slope change	− 0.597	0.239	0.016	− 1.079 to − 0.116
Slope after	− 0.018	0.17	0.916	− 0.36 to 0.324

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