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Fig. 1 | BMC Public Health

Fig. 1

From: The association of psychological distress and economic and health worries with tobacco smoking behavior during the COVID-19 pandemic: a two-year longitudinal cohort study

Fig. 1

Flow chart of the study design and cohort overview. Flow chart of the longitudinal study design, including wave 1, which consisted of a two-week baseline assessment (T0), wave 2 after nine months, covering four weeks of data collection (T1), and wave 3 after an additional 12 months, covering four weeks of data collection (T2)

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BMC Public Health

ISSN: 1471-2458

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