Table 4 Latent class membership by problems and concurrent use of other substances

(A) Latent class membership by problems

Problems last year

Health

39(10.3)

8(9.6)

25(9.6)

6(15.8)

\({\chi }^{2}\)=1.40 p=0.497

Psychological

108(28.4)

16(19.3)

75(29.0)

17(44.7)

\({\chi }^{2}\)=8.42 p=0.015

At school/university

72(18.9)

14(16.9)

49(18.9)

9(23.7)

\({\chi }^{2}\)=0.78 p=0.674

Family

73(19.2)

15(18.1)

42(16.2)

16(42.1)

\({\chi }^{2}\)=14.40 p=0.001

Financial

116(30.5)

25(30.1)

73(28.1)

18(47.4)

\({\chi }^{2}\)=5.76 p=0.056

Fines

118(31.1)

20(24.1)

80(30.9)

18(47.4)

\({\chi }^{2}\)=6.60 p=0.037

Cannabis Abuse Screening Test

10.0(4.4)

8.0(3.5)

10.0(4.2)

13.9(5.1)

F = 26.51 p < 0.0001

CUD (CAST ≥ 9)

225(59.2)

36(43.4)

155(60.0)

34(89.5)

\({\chi }^{2}\)=23.99 p<0.0001

Dependence (CAST ≥ 12)

139(36.6)

18(21.7)

95(36.7)

26(68.4)

\({\chi }^{2}\)=24.54 p<0.0001

(B) Latent class membership by concurrent use of other substances

Tobacco (last month)

271(71.3)

52(62.7)

186(71.8)

33(86.8)

\({\chi }^{2}\)=7.56 p=0.023

Alcohol (last month)

327(86.5)

72(87.8)

227(87.9)

28(73.7)

\({\chi }^{2}\)=5.95 p=0.051

Inhalants (last year)

38(10.0)

2(2.4)

31(12.0)

5(13.2)

\({\chi }^{2}\)=6.73 p=0.035

Cocaine (last year)

137(36.1)

19(23.2)

98(37.8)

20(52.6)

\({\chi }^{2}\)=10.78 p=0.005

Amphetamine

(last year)

81(21.4)

10(12.2)

60(23.2)

11(28.9)

\({\chi }^{2}\)=5.90 p=0.052

Ecstasy (last year)

95(25.1)

19(23.2)

64(24.7)

12(31.6)

\({\chi }^{2}\)=1.03 p=0.597

LSD (last year)

37(9.8)

3(3.7)

27(10.4)

7(18.4)

\({\chi }^{2}\)=6.83 p=0.033

Sedative-hypnotics

(last year)

70(18.5)

17(20.7)

49(18.9)

4(10.5)

\({\chi }^{2}\)=1.90 p=0.386

Synthetic cannabinoids (last year)

14(3.7)

1(1.2)

9(3.5)

4(10.5)

\({\chi }^{2}\)=6.43 p=0.040

Mushrooms (last year)

48(12.7)

8(9.8)

37(14.3)

3(7.8)

\({\chi }^{2}\)=2.02 p=0.363

Use of ≥ 1 non-cannabis illicit drug (past year)

209(55.1)

37(45.1)

149(57.5)

23(60.5)

\({\chi }^{2}\)=4.37 p=0.112