Table 4 Self-reported cannabis use by random subsample (expressed in %), using the cannabis-related questions of the ASSIST V3.0 questionnaire

2. In the past three months how often have you used cannabis?

1.0

- Never

2.5

2.5

2.5

- One or two times

3.9

3.9

3.9

- Monthly

4.2

4.1

4.3

- Weekly

15.4

16.0

14.8

- Daily or almost daily

74.0

73.5

74.5

3. During the past three months how often have you had a strong desire or urge to use cannabis?

0.6

- Never

12.3

12.6

12.2

- One or two times

14.0

15.3

12.6

- Monthly

5.3

5.3

4.9

- Weekly

18.4

17.9

18.8

- Daily or almost daily

50.1

48.9

51.5

4. During the past three months how often has your use of cannabis led to health, social, legal or financial problems?

0.8

- Never

45.0

44.4

45.7

- One or two times

21.2

22.4

19.8

- Monthly

13.3

13.2

13.5

- Weekly

11.8

11.3

12.3

- Daily or almost daily

8.7

8.7

8.7

5. During the past three months how often have you failed to do what was normally expected of you because of your use of cannabis?

0.8

- Never

40.5

41.5

39.4

- One or two times

22.3

21.0

23.7

- Monthly

10.9

10.8

11.1

- Weekly

15.6

15.7

15.2

- Daily or almost daily

10.8

11.0

10.6

6. Has a friend or relative or anyone else ever expressed concern about your use of cannabis?

0.3

- No, never

35.3

34.2

36.0

- Yes, in the past three months

17.2

16.1

18.2

- Yes, but not in the past three months

47.5

49.6

45.7

7. Have you ever tried to control, cut down or stop using cannabis?

0.7

- No, never

35.3

36.0

35.2

- Yes, in the past three months

25.8

24.7

26.8

- Yes, but not in the past three months

38.9

39.3

38.1

Cannabis involvement score (sum of responses to Q2-Q7)

22.8 (9.9)

22.8 (9.8)

22.8 (10.0)

1.0

Risk level according to ASSIST v3.0

0.9

- Low (0–3)

3.3

3.1

3.6

- Moderate (4–26)

54.2

53.8

53.8

- High (≥27)

42.5

43.1

42.5