参与者完成了一项访谈式调查,其中包含了与所有形式的吸烟以及健康和生活方式变量有关的问题。
Participants completed an interviewer-administered survey that contained items on all forms of tobacco use and on health and lifestyle variables.
在此期间,另外800名Thomson以及First Choice的客户也完成了一项在线调查。
A further 800 Thomson and First Choice customers also completed an online survey over the same period.
这份报告是由来自旧金山大学的P.弗雷和他的同事们完成的,他们调查访问了111513名已经戒烟的人,3176名仍在吸烟的人,以及4196名从不吸烟的患者。
The study led by P. Frey and colleagues from University of California - San Francisco looked at 111,513 ex-smokers, 3,176 current smokers, and 4,196 patients who never smoked.
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