Awareness, experience and prevalence of IQOS among the Korean young adults and multivariable association of IQOS awareness and ever use
| Factor | Category | n (228) | Univariate association between IQOS awareness/ever use/current use and sociodemographic characteristic and smoking behaviour | Multivariable association of IQOS awareness and ever use | ||||||
| IQOS awareness (n=87) | IQOS ever use (n=13) | Current IQOS use (n=8) | IQOS awareness | IQOS ever use | ||||||
| n (%) | P values | n (%) | P values | n (%) | P values | OR (95% CI) | OR (95% CI) | |||
| Gender | Female | 114 | 46 (52.9) | 0.495 | 9 (69.2) | 0.153 | 6 (75.0) | 0.569 | Ref | Ref |
| Male | 114 | 41 (47.1) | 4 (30.8) | 2 (25.0) | 1.10 (0.59 to 2.05) | 3.11 (0.67 to 14.30) | ||||
| Age (mean±SD) | 228 | 22.31±1.43 | 0.279 | 21.92±1.12 | 0.526 | 21.50±0.93 | 0.082 | 1.12 (0.89 to 1.40) | 0.80 (0.46 to 1.37) | |
| Education level | High school | 121 | 27 (31.0) | 0.497 | 4 (30.8) | 0.770 | 2 (25.0) | 0.850 | Ref | Ref |
| 2-year college degree | 37 | 11 (12.6) | 3 (23.1) | 2 (25.0) | 0.70 (0.25 to 1.96) | 0.84 (0.10 to 6.78) | ||||
| 4-year college degree | 70 | 49 (56.3) | 6 (46.2) | 4 (50.0) | 1.51 (0.71 to 3.20) | 1.22 (0.22 to 6.68) | ||||
| Monthly allowance (KRW) | None | 49 | 14 (16.1) | 0.076 | 1 (7.7) | 0.028 | 0 (0.0) | 0.386 | Ref | Ref |
| Less than 50 000 won | 39 | 13 (14.9) | 1 (7.7) | 1 (12.5) | 1.65 (0.59 to 4.61) | 1.72 (0.06 to 50.87) | ||||
| 50 000–99 999 won | 54 | 17 (19.5) | 3 (23.1) | 1 (12.5) | 1.28 (0.49 to 3.29) | 3.63 (0.23 to 57.01) | ||||
| 100 000–149 999 won | 41 | 20 (23.0) | 1 (7.7) | 1 (12.5) | 1.59 (0.60 to 4.27) | 0.37 (0.02 to 9.47) | ||||
| More than 150 000 won | 45 | 23 (26.4) | 7 (53.8) | 5 (62.5) | 1.00 (0.36 to 2.80) | 1.95 (0.17 to 22.78) | ||||
| Conventional cigarette smoking | Never smoker | 151 | 37 (42.5) | 0.000 | 1 (7.7) | 0.000 | 0 (0.0) | 0.188 | Ref | Ref |
| Current smoker | 77 | 50 (57.5) | 12 (92.3) | 8 (100.0) | 4.50** (2.19 to 9.25) | 11.65* (1.02 to 132.56) | ||||
| E-cigarette use | Never e-cigarette user | 194 | 65 (71.3) | 0.000 | 3 (23.1) | 0.000 | 0 (0.0) | 0.012 | Ref | Ref |
| Current e-cigarette user | 34 | 25 (28.7) | 10 (76.9) | 8 (100.0) | 2.99* (1.11 to 8.07) | 9.65* (1.63 to 57.01) | ||||
KRW is South Korea’s currency, the won (1000 won=US$1).
↵*P<0.05; **P<0.0001.