Stoklosa 2020.

Study characteristics
Methods	Design: interrupted time‐series Study dates: 2014–2018 Data source: sales data from Intage Inc., a market research company that collects monthly sales data from supermarkets and convenience stores Location: Japan
Participants	Heated tobacco use prevalence assessed? No Definition of heated tobacco use prevalence: N/A Participant characteristics: N/A Heated tobacco sales assessed? Yes Definition of heated tobacco sales: heated tobacco sticks sold per capita
Interventions	Interruption time point: September 2015 or April 2016  Method used to select interruption: interruption time point was selected depending on when IQOS was introduced to market in each prefecture
Outcomes	Abstinence outcomes: N/A Safety outcomes: N/A Prevalence/sales outcomes: difference in monthly reduction in cigarette sales per capita  Definition of smoking prevalence: N/A Definition of cigarette sales: cigarette sticks sold per capita
Notes	Funding source No funding from the tobacco industry: quote: "This research received no specific grant from any funding agency in the public, commercial or not‐for‐profit sectors". Author conflicts of interest Quote: "None declared".