Total N=50 Self reported Drugs
Consumption
Drugs Confirmed
Analysis CG-MS
Cocaine N= 23 N=17  
Cannabis N=14 N=4  
Amphetamines N=1 *ND
Opiates N=13 N= 3
Methadone N=14 N=13  
*ND: not detected
Table 5: Analytical Results and self reported consumption of drugs.