When using DAM Core resources, we recommend the following practice:

• Invite an analyst to be an author when they were involved in analytical design, implementation, or interpretation in a meaningful way. Executing a pre-specified, simple analysis plan would not necessarily rise to this level.
• Invite a data manager to be an author when variables that they designed/derived are included.
• Invite the core lead or investigator to be an author if they contributed intellectually in a meaningful way.

Anyone invited to be an author would be expected to fulfill all the usual obligations of authorship (ICMJE). If individual contributions do not rise to the level of authorship, we recommend asking those individuals if they would like to be included in the Acknowledgments.

For all papers using DAM Core resources, acknowledge funding from the CAsToR grant (U54CA229974).

• Waves 1 through 5.5 and ATS
• Adult (18+ years old), youth (12-17 years old), and Youth Merged datasets (which combines information from the adult individuals who entered the study as a youth but aged up to adults in the following waves, with youth datasets).
• Variables derived by DAM to assess:
  • Tobacco product use status (non-user, non-current, or current user) based on past 30-days use and established/regular use
  • Initiation, duration of use, and cessation
  • Intensity of use and tobacco dependence
  • Poly-tobacco use
  • Flavored tobacco use
  • Health outcomes
  • Impact of COVID-19 (Waves 5.5 and ATS)

We have also generated dictionaries for each wave to review detailed information on the DAM-derived variables:

• Adult datasets:
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 1) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 1) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 2) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 2) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 3) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 3) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 4) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 4) (pdf)
• Youth datasets:
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 1) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 1) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 2) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 2) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 3) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 3) (pdf)
  • Derived Variables by DAM Core: Cigarettes and ENDS (Wave 4) (pdf)
  • Derived Variables by DAM Core: All Tobacco Products (Wave 4) (pdf)

• Data from 1991 through 2020
• Youth from 8th, 10th, and 12th grades.
• Variables derived by DAM to assess:
  • Use of cigarettes, ENDS, and smokeless tobacco in the last 30 days.
  • Flavored tobacco use

• Data from 2002 to 2020
• Ages 12+ years old
• Variables derived by DAM Core:
  • Established cigarette smoking status (current, former, or never user)
  • Menthol cigarette smoking status, categorized as non-current smoker, menthol smoker, non-menthol smoker

• Data from 1999 through 2021
• Ages (9-19+ years old)
• Variables derived by DAM Core:
  • Established cigarette smoker status (current, non-current, or never smoker)
  • Established e-cigarette user status (current, non-current, or never user).
  • Dual use status of cigarettes and e-cigarettes categorized as never user, non-current user, exclusive cigarette smoker, exclusive e-cig user, current dual user.

• Data from 1992 through 2019
• Adult (18+ years old)
• Variables derived by DAM Core:
  Cigarette use status (non-user, non-current, or current user) based on established use
  • Initiation, duration of use, and cessation
  • Menthol cigarette-use indicator available for 2003 and after
  • Other tobacco product use status (non-user, non-current, or current user) available for 1995 and after
  • Initiation, duration of use, cessation, and flavored use available from 2010 and after for other tobacco products

• Data from 1980 through 2021
• Adult (18+ years old)
• Variables derived by DAM:
  • Menthol cigarette smoking status, categorized as non-current smoker, menthol smoker, or non-menthol smoker (available for 1980, 2005, 2010, and 2015)
  • Years since quit, categorized as: 1-5, 6-10, 11-14, 15-19, 20-24, 25-29, 30+ (available for 1994, 1995, 1997 to 2018, and 2020)
  • Established cigarette smoking status (current, former, or never user)