Table 1.

Quit success among daily and all (daily + non-daily) menthol and non-menthol adult (18+) smokers after the Canadian menthol cigarette ban, with effect sizes applied to menthol smokers (all smokers and African American smokers), based on the number of US adult (18+) menthol smokers from the 2019 National Survey on Drug Use and Health (NSDUH)

	Percentage of quitters among adult smokers from the pooled analysis (7 provinces from ITC Survey + Ontario from Ontario Study)			Effect size of Canadian Menthol Ban Applied to All US Adult Menthol Smokers		Effect size of Canadian Menthol Ban Applied to African American Adult Menthol Smokers
	Mainly menthol	Non-menthol	Difference: Menthol ban effect size (95% CI)	All Smokers (95% CI)	Daily Smokers Only (95% CI)	All Smokers (95% CI)	Daily Smokers Only (95% CI)
NSDUH 2019: Number of US Adult Menthol Smokers	N/A	N/A	N/A	18,328,597	9,871,550	5,222,907	2,496,650
Quit success: Daily smokers	21.2%	13.2%	8.0% (2.4%–13.7%)*	N/A	789,724 (236,917–1,352,402)	N/A	199,732 (59,920–342,041)
Quit success: All Smokers (Daily + Non-Daily)	22.3%	15.0%	7.3% (2.1%–12.5%)**	1,337,988 (384,901–2,291,075)	N/A	381,272 (109,681–652,863)	N/A

^*p =0.005

^**p = 0.006

Mainly menthol smokers: respondents who reported smoking menthol cigarettes “frequently” (Ontario Study) or reported a menthol brand as their usual brand (ITC Survey). Definition of “frequent” use of menthol is provided in Supplemental Table 1.

Quit success: Wave 1 smokers who reported at Wave 2 that they were not smoking at all.

Implementation of menthol cigarette bans in the 7 provinces included in analysis of the ITC Canada Survey data: Quebec (August 26, 2016), Ontario (January 1, 2017), Prince Edward Island (May 1, 2017), Newfoundland and Labrador (July 1, 2017), British Columbia (October 2, 2017), Saskatchewan (October 2, 2017), and Manitoba (October 2, 2017).