Table 2 Prevalence (percent with their 95% confidence intervals) of students reporting various combinations of smoking in the past month (S), drinking in the past month (D) and cannabis use in the past year (C) by sex and age. Y: Yes, N: No

N

N

N

226

41

34–49

44

36–52

24

18–30

Y

N

N

31

5

3–9

5

2–10

5

3–10

N

Y

N

135

20

15–27

18

13–24

27

20–35

N

N

Y

14

2

1–4

4

2–9

2

1–6

Y

Y

N

58

9

6–13

10

7–15

9

6–14

N

Y

Y

12

2

1–4

1

0–5

3

1–7

Y

N

Y

11

1

0–3

1

0–5

4

2–7

Y

Y

Y

54

7

4–11

5

2–11

14

10–20

N

N

N

286

50

43–57

43

36–50

35

27–43

Y

N

N

20

3

1–7

3

1–7

4

2–8

N

Y

N

180

25

20–32

28

21–35

31

25–38

N

N

Y

19

4

2–8

4

2–7

1

0–4

Y

Y

N

72

7

4–13

14

10–20

13

9–18

N

Y

Y

5

1

0–3

1

0–4

1

0–4

Y

N

Y

4

<1

0–3

1

0–4

1

0–4

Y

Y

Y

28

3

1–6

3

1–8

8

5–13