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Aims To quantify the overall effectiveness of computer‐delivered interventions for alcohol and tobacco use.
Methods Meta‐analysis of 42 effect sizes from randomized controlled trials, based on the responses of 10 632 individuals.
Results The weighted average effect size (d) was 0.20, P < 0.001. While lower effect sizes were associated with studies addressing tobacco use (d = 0.14) this may well...
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