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of 6.5 in the direction of higher dependence (see Table 9.6). None of this cohort had further positive reliable change (ie in the direction of reduced dependence) but 16 (nearly 50%) of them had negative change (ie in the direction of increased dependence) that was statistically reliable.
Table 9.6 Total dependence and change scores for those in Sample 6c (n=101) who met the two criteria for clinically significant change over the first three month follow-up period; n = 32 (3 missing cases)
LDQ t1
mean 18.2 SD 6.7 median 18.5
LDQ t2
LDQ t3
LDQ change between t1 and t2
LDQ change between t2 and t3
-6.5 8 -5.5 0
mode
2.8 2.7 2.5 0
9.3 8.3 8.5 0
15.3 6.7 14.5 8a
21
a multiple modes exist for which this is the lowest.
When reliable change and clinically significant change data between intake and three month follow-up for Sample 6c were analysed by drug group, no significant differences were found between the proportion of heroin users in the heroin group and the proportion of alcohol users in the alcohol group who had only statistically reliable change or both statistically reliable and clinically significant change (see Table 9.7).
Thirty two participants had a reliable change score greater than 1.96, ie their difference scores showed statistically reliable change, between three month and twelve month follow-up and of these, 24 had clinically significant change. This group changed quite differently from those who had significant change between t1 and t2. As a group they made very little change during the first three months; total dependence data at each of the data collection points, and change data measured at the follow-up points are presented in Table 9.8.
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