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Chunk #19 — II. Materials and Methods — Data analyses

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Testing a level of response to alcohol-based model of heavy drinking and alcohol problems in 1,905 17-year-olds.
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Evaluation of statistical mediation within the cross-sectional model used a product-of-coefficients test within Mplus, version 5.1 (Muthén and Muthén, 2007; MacKinnon et al., 1995). Non-normal distributions in these mediational analyses were addressed using the bias-corrected bootstrapping approach with 1,000 resamples (Fritz and MacKinnon, 2007). The results are presented as the 2.5th and 97.5th percentiles, reflecting the lower and upper limits of the 95% confidence intervals where mediation is indicated when the confidence interval does not span across zero. Also, gender differences were evaluated within AMOS through the creation of separate results for males and females in order to observe possible differences in elements of the model across these groups.