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Figure 1: Comparison of alcohol and polysubstance dependence. Comparison of polysubstance dependence in 85 & 86 with 2005 & 2006 Z = 2.4, P<0.05, significant statistically. Comparison of polysubstance dependence in 95 & 96 with 2005 & 2006 Z = 3, P < 0.01 signifi cant statistically. Polysubstance dependence shows increasing trend over recent years (05 & 06).

Figure 1: Comparison of alcohol and polysubstance dependence. Comparison of polysubstance dependence in 85 & 86 with 2005 & 2006 Z = 2.4, P<0.05, significant statistically. Comparison of polysubstance dependence in 95 & 96 with 2005 & 2006 Z = 3, P < 0.01 signifi cant statistically. Polysubstance dependence shows increasing trend over recent years (05 & 06).