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Rapid increase in heated tobacco product (HTP) use from 2015 to 2019: from the Japan ‘Society and New Tobacco’ Internet Survey (JASTIS)
  1. Ai Hori1,
  2. Takahiro Tabuchi2,
  3. Naoki Kunugita3
  1. 1Department of Global Public Health, University of Tsukuba, Tsukuba, Ibaraki, Japan
  2. 2Cancer Control Center, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
  3. 3University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
  1. Correspondence to Dr Ai Hori, Department of Global Public Health, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan; ihori-sgy{at}umin.ac.jp

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Heated tobacco products (HTPs) were introduced in Japan in 2014 without sufficient scientific evidence about the associated health risks. Our previous report found substantial HTP use in Japan after 2016.1 This study aims to clarify how the prevalence of HTP use (IQOS, Ploom TECH and glo) has increased over the last 5 years in Japan using ongoing retrospective Japan ‘Society and New Tobacco’ Internet Survey (JASTIS) data.

Method

We calculated the prevalence of HTP use from 2015 to 2019 from the JASTIS dataset. At baseline in 2015, 8240 participants aged 15–69 years were randomly selected from a Japanese large internet search agency, Rakuten Research.2 Adjusted estimates using inverse probability weighting (IPW) obtained from a propensity score (calculated by logistic regression models using basic demographic and socioeconomic factors) were calculated to correct for the selectivity of internet-based samples, using a probability sample that is representative of the Japanese …

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