Table 1 Study variables and collection time points (at baseline and follow-up)

Tobacco

Type of tobacco or other products consumed and quantity

X

X

X

X

Nicotine dependence

X

X

X

X

Age at first consumption

X

Age at start of regular consumption

X

Previous attempts to stop smoking in their entire consumption trajectory

X

Previous attempts to quit smoking in the last year

X

Previous attempts to quit smoking since the last questionnaire

X

X

X

Maximum withdrawal time

X

Resources used to quit smoking

X

X

X

X

X

X

X

Motivation to quit smoking

X

X

X

X

Smoking cessation provision

X

X

X

X

X

X

X

Efficacy

X

X

X

X

X

X

X

Level of smoking approach received

X

X

X

X

X

X

X

X

Environment

X

Abstinence from consumption

X

X

X

X

X

X

X

Cannabis

Consumption once in lifetime

X

X

X

X

Consumption in the last month

X

X

X

X

X

X

X

Frequency of cannabis use in the last month

X

X

X

X

Problem cannabis use (only for patients under treatment for alcohol abuse)

X

X

X

X

X

X

X

Frequency of use, consumption, and interaction with tobacco in the last 30 days

X

X

X

X

X

X

X

Context of cannabis smoking

X

X

X

X

Latest consumption

X

X

X

X

X

X

X

Age at start of consumption

X

Reasons for cannabis use

X

Previous attempts to stop using cannabis

X

Maximum withdrawal time

X

Resources used to stop using cannabis

X

Willingness to quit cannabis use

X

X

X

X

X

X

X

Motivation to quit cannabis use

X

X

X

X

Efficacy

X

X

X

X

X

X

X

Environment

X

Alcohol

Alcohol consumption in the last month

X

X

X

X

X

X

X

Problem alcohol use (only patients receiving cannabis dishabituation)

X

Context of alcohol drinking

X

Latest consumption

X

X

X

X

X

X

X

Age at start of consumption

X

Reasons for alcohol consumption

X

Previous attempts to stop drinking alcohol

X

Maximum withdrawal time

X

Resources used to stop drinking alcohol

X

Willingness to quit alcohol

X

X

X

X

X

X

X

Motivation to quit alcohol

X

X

X

X

Efficacy

X

X

X

X

X

X

X

Environment (family, friends, etc.)

X

Psychiatric diagnostic

Suicide risk

X

X

X

Quality of life

X

X

X

X

X

Self-perceived health status

X

X

X

X

X

X

X

Sociodemographic

X

Primary outcome

Breathed CO concentration

X

X

X

X

X

X

X