Table 1. Characteristics of participants.
| Never cigarettes smoker | Former cigarettes smoker | Current cigarettes smoker | Total | ||||
|---|---|---|---|---|---|---|---|
| HTPs use (-) | HTPs use (+) | HTPs use (-) | HTPs use (+) | HTPs use (-) | HTPs use (+) | ||
| Number | 5,546 (61.57%) | 54 (0.60%) | 1,886 (20.94%) | 213 (2.36%) | 763 (8.47%) | 546 (6.06%) | 9,008 |
| Age (years) | |||||||
| 15–19 | 797 (93.54%) | 8 (0.94%) | 9 (1.06%) | 1 (0.12%) | 14 (1.64%) | 23 (2.70%) | 852 |
| 20–29 | 1,237 (80.06%) | 26(1.68%) | 80 (5.18%) | 27 (1.75%) | 67 (4.34%) | 108 (6.99%) | 1,545 |
| 30–39 | 879 (62.38%) | 10(0.71%) | 254 (18.03%) | 54 (3.83%) | 98 (6.96%) | 114 (8.09%) | 1,409 |
| 40–49 | 918 (54.19%) | 5(0.30%) | 400 (23.61%) | 56 (3.31%) | 186 (10.98%) | 129 (7.62%) | 1,694 |
| 50–59 | 773 (49.42%) | 5(0.32%) | 436 (27.88%) | 51 (3.26%) | 206 (13.17%) | 93 (5.95%) | 1,564 |
| 60–73 | 942 (48.46%) | 0(0%) | 707 (36.37%) | 24 (1.23%) | 192 (9.88%) | 79 (4.06%) | 1,944 |
| Sex | |||||||
| Male | 1,996 (45.22%) | 26 (0.59%) | 1284 (29.09%) | 156 (3.53%) | 539 (12.21%) | 413 (9.36%) | 4,414 |
| Female | 3,550 (77.27%) | 28 (0.61%) | 602 (13.10%) | 57 (1.24%) | 224 (4.88%) | 133 (2.90%) | 4,594 |
| Equivalent household income | |||||||
| 1st quartile (Lowest) | 1,161 (64.82%) | 10 (0.56%) | 334 (18.65%) | 36 (2.01%) | 166 (9.27%) | 84 (4.69%) | 1,791 |
| 2nd quartile | 1,026 (59.89%) | 18 (1.05%) | 403 (23.53%) | 39 (2.28%) | 134 (7.82%) | 93 (5.43%) | 1,713 |
| 3rd quartile | 998 (56.64%) | 7 (0.40%) | 401 (22.76%) | 47 (2.67%) | 161 (9.14%) | 148 (8.40%) | 1,762 |
| 4th quartile (Highest) | 932 (53.97%) | 11 (0.64%) | 434 (25.13%) | 56 (3.24%) | 152 (8.80%) | 142 (8.22%) | 1,727 |
| Did not know / Unwilling to answer | 1,429 (70.92%) | 8 (0.40%) | 314 (15.58%) | 35 (1.74%) | 150 (7.44%) | 79 (3.92%) | 2,015 |
| Education | |||||||
| Junior high school / High school / Other | 1,872 (63.41%) | 24 (0.81%) | 530 (17.95%) | 72 (2.44%) | 282 (9.55%) | 172 (5.83%) | 2,952 |
| Technical school / College | 1,141 (63.35%) | 9 (0.50%) | 367 (20.38%) | 41 (2.28%) | 159 (8.83%) | 84 (4.66%) | 1,801 |
| University / Graduate school | 2,533 (59.53%) | 21 (0.49%) | 989 (23.24%) | 100 (2.35%) | 322 (7.57%) | 290 (6.82%) | 4,255 |
| Drinking | |||||||
| Never | 2,339 (77.60%) | 14 (0.46%) | 380 (12.61%) | 50 (1.66%) | 160 (5.31%) | 71 (2.36%) | 3,014 |
| Former | 708 (66.35%) | 2 (0.19%) | 211 (19.78%) | 20 (1.87%) | 72 (6.75%) | 54 (5.06%) | 1,067 |
| Current | 2,499 (50.72%) | 38 (0.77%) | 1295 (26.28%) | 143 (2.90%) | 531 (10.78%) | 421 (8.54%) | 4,927 |
| Type of HTP | |||||||
| Ploom TECH | 11 (2.47%) | 88 (19.78%) | 346 (77.75%) | 445 | |||
| IQOS | 43 (9.71%) | 126 (28.44%) | 274 (61.85%) | 443 | |||
| Glo | 12 (4.53%) | 73 (27.55%) | 180 (67.92%) | 265 | |||
| Hypertension | 543 (43.41%) | 1 (0.08%) | 458 (36.61%) | 34 (2.72%) | 123 (9.83%) | 92 (7.35%) | 1251 |
| Diabetes | 151 (35.78%) | 1 (0.24%) | 148 (35.07%) | 14 (3.32%) | 56 (13.27%) | 52 (12.32%) | 422 |
| Angina | 37 (38.54%) | 2 (2.08%) | 30 (31.25%) | 1 (1.04%) | 7 (7.29%) | 19 (19.79%) | 96 |
| Myocardial Infarction | 15 (27.27%) | 2 (3.64%) | 20 (36.36%) | 0 (0%) | 4 (7.27%) | 14 (25.45%) | 55 |
| Stroke | 29 (41.43%) | 0 (0%) | 22 (31.43%) | 3 (4.29%) | 3 (4.29%) | 13 (18.57%) | 70 |
| CVD | 68 (39.53%) | 2 (1.16%) | 61 (35.47%) | 4 (2.33%) | 10 (5.81%) | 27 (15.70%) | 172 |
| Asthma | 277 (65.18%) | 4 (0.94%) | 75 (17.65%) | 10 (2.35%) | 21 (4.94%) | 38 (8.94%) | 425 |
| COPD | 10 (23.81%) | 0 (0%) | 10 (23.81%) | 3 (7.14%) | 5 (11.90%) | 14 (33.33%) | 42 |
| Cancer | 62 (49.21%) | 1 (0.79%) | 40 (31.75%) | 6 (4.76%) | 2 (1.59%) | 15 (11.90%) | 126 |
Equivalent household income: 25th = 2250.0 thousand-yen, 50th = 3250.0 thousand-yen, 75th = 4907.5 thousand-yen, COPD: Chronic obstructive pulmonary disease, CVD: Cardiovascular disease, HTP: Heated tobacco product.