Table 1 Study assessments

Enrollment

Eligibility screening

x

Informed Consent

x

Randomization

x

Interventions

Usual brand menthol cigarettes available

x

Cigarettes and e-cigarettes available by regulatory scenario: (A) no menthol ban, (B) menthol ban in cigarettes only, or (C) menthol ban in both cigarettes and e-cigarettes

x

x

x

x

x

Assessments

Demographics

x

Tobacco use history

x

Medical history interview

x

Mood (anxiety GAD-7^a, depression PHQ-8^b)

x

Quality of life^c

x

x

Racial trauma and discrimination (TSDS^d) and ethnic identity (MEIM^e)

x

Timeline follow-back interview^f (cigarettes, e-cigarettes, cannabis and other tobacco products)

x

x

x

x

x

x

x

x

Nicotine dependence (cigarette and e-cigarette PROMIS measures)^g,h

x

x

x

x

Wisconsin Inventory of Smoking Dependence Motives (WISDM-37)i

x

x

Time to first cigarette (FTND)^j

x

x

x

x

x

Cigarette quitting motivation and confidence^k

x

x

x

Product satisfaction (Modified cigarette evaluation scale, modified e-cigarette evaluation scale)^l,m

x

x

x

x

x

Product cravingⁿ (cigarette, e-cigarette)

x

x

x

x

x

x

Nicotine withdrawal (Minnesota Nicotine Withdrawal Scale^o)

x

x

x

x

x

x

Health and safety assessment

x

x

x

x

x

x

x

Protocol adherence measures (spent cigarette filters, e-cigarette pods, use of other mentholated products)

x

x

x

x

x

x

x

Biochemical measures

Urine pregnancy test

x

x

x

x

x

x

x

Urine biomarkers (cotinine, total nicotine equivalents, menthol glucuronide)

x

x

x

x

Expired breath carbon monoxide (CO)

x

x

x

x

x

x

x

x

Spirometer lung function test

x

x

x

x

x

x

x