Chunk #15 — 3. RESULTS — 3.1 Descriptive Statistics

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Is the Fagerström test for nicotine dependence invariant across secular trends in smoking? A question for cross-birth cohort analysis of nicotine dependence.

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yes

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Current FTND analyses included 9,865 participants (Table S1)1. AAND, COGEND, and COHRA1 had the lowest proportions of participants in the oldest birth cohorts; COPDGene had the oldest participants, and UW-TTURC had a more normally shaped distribution for the year of birth.