MMWR Morb Mortal Wkly Rep. 2016 Oct 28;65(42):1177. doi: 10.15585/mmwr.mm6542a7.
In 2015, 3.5% of U.S. adults were current e-cigarette users. Among adult e-cigarette users overall, 58.8% also were current cigarette smokers, 29.8% were former cigarette smokers, and 11.4% had never been cigarette smokers. Among current e-cigarette users aged ≥45 years, 98.7% were either current or former cigarette smokers, and 1.3% had never been cigarette smokers. In contrast, among current e-cigarette users aged 18-24 years, 40.0% had never been cigarette smokers.
2015 年,美国有 3.5%的成年人是当前电子烟使用者。在所有成年电子烟使用者中,58.8%的人同时也是当前吸烟者,29.8%的人曾经是吸烟者,11.4%的人从未吸过烟。在≥45 岁的当前电子烟使用者中,98.7%的人曾经或现在是吸烟者,1.3%的人从未吸过烟。相比之下,在 18-24 岁的当前电子烟使用者中,有 40.0%的人从未吸过烟。