Table 4 Substance related variables on all three measurements

Current nicotine use

34

10.7

8

10.5

26

10.7

34

10.7

9

11.8

25

10.3

37

11.7

10

13.2

27

11.2

Current alcohol use

184

58

49

64.5

135

56

201

63.4

52

68.4

149

61.8

193

60.9

52

68.4

141

58.5

Changes alcohol last 14 days

 Increase

20

10.9

5

10.2

15

11.1

8

3.9

3

5.7

5

3.4

7

3.6

2

3.8

5

3.5

 Decrease

16

8.7

4

8.1

12

8.9

13

6.5

2

3.8

11

7.4

8

4.1

2

3.8

6

4.3

Main setting alcohol use

 Friends

102

55.4

23

46.9

79

58.5

112

55.7

20

38.5

92

61.7

88

45.6

16

30.7

72

51

 Family

68

37

20

40.8

48

35.6

71

35.3

22

42.3

49

32.9

88

45.6

27

51.9

61

43.3

 Alone

14

7.6

6

12.2

8

5.9

18

9

10

19.2

8

5.4

17

8.8

9

17.3

8

5.7

AUDIT Score

   < 8

156

84.8

37

75.5

119

88.1

   >  = 8

28

15.2

12

24.5

16

11.9

Days alcohol use last 30 days

8.17

7.47

10.1

8.67

7.47

6.88

9.37

8.18

11.6

9.46

8.7

7.56

8.39

7.68

10.5

9.03

7.64

7.05

Average number glasses alcohol per occasion

2.15

2.15

2.74

3.19

1.95

1.64

1.86

1.29

2.25

1.59

1.74

1.14

2.28

2.95

2.67

3.13

2.14

2.89

AUDIT Score

4.9

4.5

6.02

4.39

4.5

2.97