Table 2.

Comparison of the interventions.

Characteristics	Version 1a	Version 2	Version 3	Version 4
Duration	50 days	28 days	50 days	28 days
Chat-based counseling	Yes	Yes	No	No
Registration (baseline)	Registration questionnaire	Registration questionnaire	Registration questionnaire	Registration questionnaire
Admission to intervention	Live chat (~50 min)	Live chat (~50 min)	Self-guided	Self-guided
Cannabis use diary and exercises	Up to 50 days	Up to 28 days	Up to 50 days	Up to 28 days
Weekly feedback	Up to 7	Up to 4	Up to 7	Up to 4
Conclusion of intervention	Live chat (~30 min)	Live chat (~30 min)	The last weekly feedback	The last weekly feedback

^aVersion 1 is identical to the original Quit the Shit intervention.