Table 2.
Sources of questions included in T0 questionnaire
| Survey items | Reference |
| General characteristics | |
| Sex, age | – |
| Geographical environment | – |
| – | |
| – | |
| Family environment | HBSC |
| HBSC | |
| HBSC | |
| HBSC | |
| HBSC | |
| Socio-economic situation | – |
| – | |
| School climate | HBSC/Unplugged |
| Substance consumption and healthcare use | |
| Use of support service | – |
| Alcohol consumption | HBSC (modified) |
| HBSC (modified) | |
| Heavy drinking episodes | HBSC (modified) |
| HBSC (modified) | |
| ESPAD (modified) | |
| Cannabis consumption | HBSC (modified) |
| – | |
| Tobacco consumption | HBSC (modified) |
| – | |
| Unplugged | |
| Representations about substance use and influences | |
| Social influences | |
| Cannabis | EROPP |
| EMCDDA (modified) | |
| EMCDDA (modified) | |
| Alcohol | ISRD (modified) |
| ISRD | |
| EMCDDA (modified) | |
| EMCDDA (modified) | |
| Tobacco | EMCDDA (modified) |
| EMCDDA (modified) | |
| Beliefs in consequences | |
| Alcohol | Unplugged/EMCDDA (modified) |
| Cannabis | Unplugged (modified) |
| Portrayal of use | |
| Alcohol | DMQ-R |
| Cannabis | DMQ-R |
| Knowledge | |
| Alcohol | EROPP (modified) |
| EROPP (modified) | |
| Cannabis | EROPP |
| EROPP | |
| History of effects of use and abuse | Unplugged/EMCDDA (modified) |
| – | |
| Life skills | |
| Peer pressure resistance | Unplugged |
| Peer pressure Inventory | |
| Unplugged | |
| Decision-making and problem-solving ability | Unplugged |
| Creative and critical thinking | Unplugged |
| Communication and interpersonal skills | Unplugged |
| Self awareness and empathy | Unplugged |
| Assertiveness | Unplugged |
| Coping with emotion and stress ability | Unplugged |
DMQ-R, Drinking Motives Questionnaire, Revised; EMCDDA, European Monitoring Centre for Drugs and Drug Addiction; EROPP, Enquête sur les Représentations, Opinions et Perceptions relatives aux Psychotropes that is, Survey on Representations, Views and Perceptions of Psychotropic Drugs; ESPADD, European School Survey on Alcohol and Other Drugs; HBSC, Health Behaviour in School-Aged Children; ISRD, International Self Report Delinquency.