Abstract：
BACKGROUND: Dual use of e-cigarettes and cigarettes is a growing usage pattern in adults, but little is known about the motivations underlying this trend. We investigated the reasons for e-cigarette use among adults who smoke, considering variation in sociodemographic subgroups.
METHODS: This repeated cross-sectional study analysed adults who smoked at least weekly and vaped at any frequency. Data were from the International Tobacco Control Korea Surveys conducted in 2016 (n=164) and 2020 (n=1088). Fourteen reasons for e-cigarette use were assessed in both waves. Subgroup analyses were performed by age, sex and educational level.
RESULTS: The top reasons for e-cigarette use in 2020 were curiosity (62.8%), less harmful than smoking (45.4%) and taste (43.2%). Curiosity was the most cited across age, sex and education subgroups. Significant differences were observed in 2020 compared with 2016, with lower percentages in goal-oriented reasons: helping quit smoking (36.3% vs 48.9%; p=0.017), helping cut down smoking (35.3% vs 52.7%; p=0.001), less harmful to others (39.0% vs 54.6%; p=0.003) and more acceptable (31.6% vs 61.2%; p<0.001). By contrast, non-goal-oriented reasons showed higher percentages in 2020, such as curiosity (62.8% vs 27.9%; p<0.001), taste (43.2% vs 22.1%; p<0.001) and enjoyment (26.8% vs 8.6%; p<0.001). In 2020, a majority of adults who smoked and vaped (53.3%) reported no intention to quit or reduce smoking.
CONCLUSIONS: E-cigarette use for curiosity and pleasure predominated among adults who smoked. The reasons for dual use in adults have shifted from goal-oriented to non-goal-oriented.
METHODS: This repeated cross-sectional study analysed adults who smoked at least weekly and vaped at any frequency. Data were from the International Tobacco Control Korea Surveys conducted in 2016 (n=164) and 2020 (n=1088). Fourteen reasons for e-cigarette use were assessed in both waves. Subgroup analyses were performed by age, sex and educational level.
RESULTS: The top reasons for e-cigarette use in 2020 were curiosity (62.8%), less harmful than smoking (45.4%) and taste (43.2%). Curiosity was the most cited across age, sex and education subgroups. Significant differences were observed in 2020 compared with 2016, with lower percentages in goal-oriented reasons: helping quit smoking (36.3% vs 48.9%; p=0.017), helping cut down smoking (35.3% vs 52.7%; p=0.001), less harmful to others (39.0% vs 54.6%; p=0.003) and more acceptable (31.6% vs 61.2%; p<0.001). By contrast, non-goal-oriented reasons showed higher percentages in 2020, such as curiosity (62.8% vs 27.9%; p<0.001), taste (43.2% vs 22.1%; p<0.001) and enjoyment (26.8% vs 8.6%; p<0.001). In 2020, a majority of adults who smoked and vaped (53.3%) reported no intention to quit or reduce smoking.
CONCLUSIONS: E-cigarette use for curiosity and pleasure predominated among adults who smoked. The reasons for dual use in adults have shifted from goal-oriented to non-goal-oriented.
摘要：
背景：电子烟和香烟的双重使用是成年人日益增长的使用模式，但对这一趋势背后的动机知之甚少。我们调查了吸烟的成年人使用电子烟的原因，考虑社会人口统计学亚组的变化。
方法：这项重复的横断面研究分析了至少每周吸烟并以任何频率吸烟的成年人。数据来自2016年（n=164）和2020年（n=1088）进行的国际烟草控制韩国调查。在这两个浪潮中评估了使用电子烟的十四个原因。亚组分析按年龄进行，性别和教育水平。
结果：2020年使用电子烟的主要原因是好奇心（62.8％）。危害小于吸烟（45.4％）和味道（43.2％）。好奇心是年龄上被引用最多的，性和教育亚组。与2016年相比，2020年观察到显著差异，目标导向原因的百分比较低：帮助戒烟（36.3%vs48.9%；p=0.017），帮助减少吸烟(35.3%对52.7%；p=0.001)，对他人的危害较小（39.0％vs54.6％；p=0.003），更可接受（31.6％vs61.2％；p<0.001）。相比之下,非目标导向的原因在2020年表现出更高的百分比，如好奇心(62.8%vs27.9%；p<0.001)，味道(43.2%对22.1%;p<0.001)和享受(26.8%对8.6%;p<0.001)。2020年，大多数吸烟和吸烟的成年人(53.3%)表示无意戒烟或减少吸烟。
结论：在吸烟的成年人中，出于好奇心和快感而使用电子烟占主导地位。成人双重使用的原因已经从面向目标转变为非面向目标。
方法：这项重复的横断面研究分析了至少每周吸烟并以任何频率吸烟的成年人。数据来自2016年（n=164）和2020年（n=1088）进行的国际烟草控制韩国调查。在这两个浪潮中评估了使用电子烟的十四个原因。亚组分析按年龄进行，性别和教育水平。
结果：2020年使用电子烟的主要原因是好奇心（62.8％）。危害小于吸烟（45.4％）和味道（43.2％）。好奇心是年龄上被引用最多的，性和教育亚组。与2016年相比，2020年观察到显著差异，目标导向原因的百分比较低：帮助戒烟（36.3%vs48.9%；p=0.017），帮助减少吸烟(35.3%对52.7%；p=0.001)，对他人的危害较小（39.0％vs54.6％；p=0.003），更可接受（31.6％vs61.2％；p<0.001）。相比之下,非目标导向的原因在2020年表现出更高的百分比，如好奇心(62.8%vs27.9%；p<0.001)，味道(43.2%对22.1%;p<0.001)和享受(26.8%对8.6%;p<0.001)。2020年，大多数吸烟和吸烟的成年人(53.3%)表示无意戒烟或减少吸烟。
结论：在吸烟的成年人中，出于好奇心和快感而使用电子烟占主导地位。成人双重使用的原因已经从面向目标转变为非面向目标。
