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. Author manuscript; available in PMC: 2008 Jul 3.
Published in final edited form as: Alcohol Clin Exp Res. 2008 Mar 11;32(5):763–770. doi: 10.1111/j.1530-0277.2008.00635.x

Figure 1.

Figure 1

Schematic illustration of cross-survey comparisons. Dashed line corresponds to comparisons of the same birth cohort at different ages (Intra-cohort comparisons, Table 1), which assesses the magnitude of age-related effects on reported prevalence. Solid lines correspond to age-matched comparisons of temporally adjacent birth cohorts (Cross-cohort comparisons, Tables 2 and 3), which are used to provide data on differences in lifetime prevalence between birth cohorts, while controlling for the effects of age by comparing similarly aged cohorts.