
No cocktail use

Moderate use

Intensive use

Significance^{a} (χ^{2}, ANOVA)


Alcohol

66.7%

66.7%

60.6%

χ^{2} = 1.2, p = .558

Number of days

19.1 (±11.7)

22.1 (±10.0)

18.6 (±10.4)

F = 2.4, p = .098

Heroin

81.4% x, y

29.4% x, z

51.0% y, z

χ^{2} = 33.9, p < .001

Number of days

27.0 (±7.4) x, y

13.8 (±10.6) x

16.0 (±10.2) y

F = 19.5, p < .001

Cannabis

69.8% x

87.3% x

80.0%

χ^{2} = 6.2, p < .05

Number of days

24.8 (±9.1)

21.7 (±9.6)

24.0 (±8.1)

F = 2.5, p = .088

Benzodiazepines

27.9% x, y

94.1% x

89.7% y

χ^{2} = 103.1, p < .001

Number of days

22.6 (±9.4)

25.0 (±8.8)

26.2 (±6.8)

F = 1.7, p = .193

Chewing tobacco

25.6% y

39.2% z

52.3% y, z

χ^{2} = 11.2, p < .01

Number of days

23.5 (±9.1)

24.5 (±9.1)

21.3 (±9.9)

F = 1.5, p = .229

Number of different substances

4.7 (±1.8) x, y

6.0 (±1.5) x

6.5 (±1.9) y

F = 17.7, p < .001

Use of 10ml syringes

11.8% x, y

61.8% x

56.9% y

χ^{2} = 14.9, p < .001

Multiple use of the same needle

45.0% x, y

69.6% x

74.8 y

χ^{2} = 13.3, p < .01

Needle/equipment sharing

48.8% y

61.8% z

90.3% y, z

χ^{2} = 43.8, p < .001

N

43

102

155
 
 ^{a}The characters x, y and z indicate significant differences between groups according to post hoc statistical tests.