Characteristics of the study subjects (internet survey), both sexes, n=8240
| Characteristics at baseline 2015 | n* | % |
| Total | 8240 | 100.0 |
| Sex | ||
| Men | 4084 | 49.6 |
| Women | 4156 | 50.4 |
| Age groups, years | ||
| 15–19 | 881 | 10.7 |
| 20–29 | 1462 | 17.7 |
| 30–39 | 1465 | 17.8 |
| 40–49 | 1487 | 18.1 |
| 50–59 | 1461 | 17.7 |
| 60–69 | 1484 | 18.0 |
| Smoking status | ||
| Never-smoker | 4839 | 58.7 |
| Former smoker | 1582 | 19.2 |
| Current smoker with intention to quit | 281 | 3.4 |
| Current smoker with no intention to quit | 1538 | 18.7 |
| Workplace indoor smoking ban status | ||
| No ban (including smoking room/corner) | 2699 | 32.8 |
| Complete ban | 3256 | 39.5 |
| Not working/did not know | 2285 | 27.7 |
| HNB tobacco/e-cigarette use status | ||
| Never used with no preference for e-cigarette use | 7369 | 89.4 |
| Never used but would like to try e-cigarette in future | 353 | 4.3 |
| Ever-user | 518 | 6.3 |
| Equivalent household income | ||
| 1st quartile (lowest) | 2079 | 25.2 |
| 2nd quartile | 1646 | 20.0 |
| 3rd quartile | 1531 | 18.6 |
| 4th quartile (highest) | 1256 | 15.2 |
| Did not know/did not want to answer | 1729 | 21.0 |
| Housing tenure | ||
| Does not own housing | 2237 | 27.2 |
| Owns housing | 6003 | 72.9 |
| Education | ||
| Junior high school/high school | 4905 | 59.5 |
| University/technical school/college or more | 3335 | 40.5 |
| Marital status | ||
| Married | 4970 | 60.3 |
| Never married | 2802 | 34.0 |
| Divorced/widowed | 468 | 5.7 |
| Alcohol consumption | ||
| Never-drinker | 3360 | 40.8 |
| Former drinker | 473 | 5.8 |
| Current drinker | 4406 | 53.5 |
| Self-rated health | ||
| Good (excellent/very good/good) | 7356 | 89.3 |
| Poor (fair/poor) | 884 | 10.7 |
| Area-level deprivation index of living place | ||
| 1st quartile (least deprived) | 1109 | 13.5 |
| 2nd quartile | 1645 | 20.0 |
| 3rd quartile | 2404 | 29.2 |
| 4th quartile (most deprived) | 2862 | 34.7 |
| Missing/unknown | 219 | 2.7 |
| Experience of having seen the TV programme†‡ | ||
| Had not seen | 3756 | 45.6 |
| Had seen | 438 | 5.3 |
| Did not respond to 2017 survey | 4046 | 49.1 |
| Awareness of tobacco company promotion† | ||
| Never, seldom or sometimes seen | 3846 | 46.7 |
| Often or very often seen | 153 | 1.9 |
| Did not respond to 2017 survey/responded to reduced version§ | 4240 | 51.5 |
*Adjusted for ‘being a respondent in an internet survey’ using a nationally representative sample in Japan.
†Information collected in 2017 survey.
‡An episode of a popular entertainment TV show introducing IQOS, broadcasted on 28 April 2016, in Japan (see methods section for detail).
§‘Responded to reduced version’ means responders who answered the question-reduced version that did not included some questions, such as on awareness of tobacco company promotion (n=194).Trends in current use of HNB tobacco/e-cigarette, both sexes, in Japan. Longitudinal internet survey, 2015, 2016 and 2017. Note: rate of glo use in 2015 and 2016 (before glo’s sales start) was 0%. HNB, heat-not-burn.
HNB, heat-not-burn.