Chunk #30 — Results — Longitudinal and twin correlations

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Stable genetic effects on symptoms of alcohol abuse and dependence from adolescence into early adulthood.

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The cross twin-cross age correlations (shown off-diagonal in Table 4) were lower than the within person-cross age correlations. Overall, cross twin-cross age correlations also decreased over age, although the pattern was less consistent than that seen for the within person correlations.