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heaviest day between t1 and t2 and a further reduction between t2 and t3 but these changes were not significant. Changes between t1 and t3 did reach significance, however (see Table 8.13).
Table 8.12 Changes detected between t1 and t2, t2 and t3, t1 and t3 in Sample 6c: heroin group (n = 60)
t1 t2 t3
no. of days used 5.7 3.4 2.2 in previous week
grams used on .7 .3 .2 heaviest day
abstinent past 7 days (%) 13 43 55 1-3 days use (%) 5 10 16.6 4-6 days use (%) 3.4 3.4 3.4 7 days use (%) 78 43 25 mean LDQ score 19.7 11.8 10.6 mean GHQ score 7.9 5.4 4.9 mean SSQ score 8.9 8.1 7.6
p< (t1/t2) p< (t2/t3) p< (t1/t3)
111 .001 .001 .001
111 .001 ns .001
ns2
233 .001 ns .001
233 .001 ns .001
233 ns ns .05
1 t-test 2 chi square
3 Mann Whitney U test of significance
Table 8.13 Changes detected between t1 and t2, t2 and t3, t1 and t3 in Sample 6c: alcohol group (n = 41)
no. of days drinking in previous week
grams drunk on heaviest day
abstinent past 7 days (%) 1-3 days drinking (%)
4-6 days drinking (%)
7 days drinking (%) mean LDQ
mean GHQ
mean SSQ 1 t-test
t1 t2 t3
4.6 2.5 2.4
174.3 121.6 88
17.1 36.6 41.5 14.7 30 29.3 19.5 12.5 9.7 48.8 20 19.5 17.6 11.6 10.4 6.9 4.1 3 8.2 7 6.4
p< (t1/t2)
.001 ns
.001 .002 ns
p < (t2/t3)
ns ns
ns ns ns
p< (t1/t3)
.0011 .0011
.0012 .0012 .012
2 Mann Whitney U test
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