Table 2. Model for identifying life-threatening admissions for drug dependence or abuse (ILIADDA).

	Regression coefficient	Odds ratio [95% CI]	P-value
Constant	−6.615
Age (y)	0.060	1.06 [1.05–1.07]	<0.001
(Age)′	−0.061	0.94 [0.93–0.95]	<0.001
Female sex	−0.155	0.86 [0.77–0.96]	0.006
Transfer at entrance	0.957	2.60 [1.99–3.41]	<0.001
Reason for hospital admission (ICD-10 code)
Drug rehabilitation (Z503)	−1.712	0.18 [0.11–0.29]	<0.001
Opioids
Poisoning by methadone (T403)	3.575	35.70 [26.94–47.32]	<0.001
Poisoning by heroin (T401)	3.123	22.72 [15.84–32.61]	<0.001
Poisoning by opium (T400)	2.905	18.26 [10.45–31.89]	<0.001
Poisoning by other opioids (T402)	3.004	20.17 [15.69–25.92]	<0.001
Mental and behavioral disorders due to use of opioids, acute intoxication (F110)	2.868	17.61 [13.49–22.97]	<0.001
Cocaine and other narcotics
Poisoning by cocaine (T405)	2.542	12.70 [8.09–19.93]	<0.001
Mental and behavioral disorders due to use of cocaine, acute intoxication (F140)	1.139	3.12 [1.69–5.79]	<0.001
Poisoning by other synthetic narcotics (T404)	2.196	8.99 [6.26–12.91]	<0.001
Poisoning by other and unspecified narcotics (T406)	2.943	18.97 [13.26–27.14]	<0.001
Others
Poisoning by cannabis (derivatives) (T407)	1.207	3.34 [1.93–5.78]	<0.001
Poisoning by other and unspecified psychodysleptics [hallucinogens] (T409)	2.105	8.21 [4.71–14.30]	<0.001
Mental and behavioral disorders due to use of sedatives or hypnotics, acute intoxication (F130)	1.817	6.16 [4.73–8.02]	<0.001
Mental and behavioral disorders due to multiple drug use and use of psychoactive substances, acute intoxication (F190)	1.908	6.74 [4.89–9.28]	<0.001

A restricted cubic spline with three knots was used to describe the effects of age (knots at 19, 36 and 59 years).