摘要目的:介绍移动戒烟项目研究方法及纳入对象的基线特征。方法:本研究为纵向、真实世界研究，采用非随机对照设计。移动戒烟项目由“在线戒烟”同名微信公众号、小程序及网站组成，用户关注微信公众号、在线填写基线信息并设置戒烟日后，在6个半月内会接受162条按计划发送的戒烟消息提醒。本研究收集2021年5月26日至2022年9月30日“在线戒烟”注册用户信息，分析人口学特征、吸烟特点、烟草依赖程度、戒烟原因等基线数据。结果:研究期间共16 746例注册，经纳入排除标准及指标填写完整情况筛选后，共13 887例（82.9%）纳入分析，每年的5—6月纳入对象1 381~2 707例/月，高于其他月份的233~569例/月，且华北地区占比最多（29.3%）。纳入对象中男性有13 316例（95.9%），年龄（36±10）岁，以25~34岁（38.8%）及35~44岁（30.8%）为主。吸烟特征方面，每日吸烟者有12 564例（90.5%），吸烟起始年龄为18（15，20）岁，烟草依赖者11 866例（85.4%），程度以轻度（76.4%）及中度（20.2%）为主。戒烟原因方面，9 315例（67.1%）为预防疾病，6 742例（48.5%）为担心吸烟对家人有影响，6 731例（48.5%）为家人要求。结论:移动戒烟项目可在较短时间内有效招募有戒烟意愿的吸烟者，尤其是男性、年轻、烟草依赖人群。

abstractsObjective:To describe the study methods and baseline characteristics of participants enrolled in mCessation program.Methods:This is a longitudinal, real-world study with non-randomized controlled design. The mCessation program consisted of a WeChat official account, an applet and a website using the same name ‘mCessation Online’. After users followed the WeChat account, filled in baseline information online and set a quit date, they would receive 162 short text messages in the next six and a half months as scheduled. This study collected the information of participants enrolled from May 26, 2021 to September 30, 2022, and analyzed baseline data including demographic characteristics, smoking characteristics, degree of tobacco dependence, reasons for smoking cessation and other related factors.Results:During the study period, a total of 16 746 participants registered, and 13 887 participants (82.9%) were enrolled in final analysis after screening the inclusion and exclusion criteria and completion of main indicators. Each year the number of enrolled participants in May or June was 1 381 to 2 707 per month, higher than the number of enrolled participants in other months (233 to 569 per month). Participants from North China accounted for the largest proportion (29.3%). There were 13 316 men (95.9%) in enrolled participants and the mean age was (36±10) years. Most participants were 25-34 (38.8%) or 35-44 (30.8%) years old. In terms of smoking characteristics, there were 12 564 (90.5%) daily smokers. The starting age of smoking was 18 (15, 20) years old. 11 866 participants (85.4%) were tobacco dependent, mostly with degree of mild (76.4%) or moderate (20.2%). In terms of reasons for quitting, 9 315 participants′ (67.1%) reasons were to prevent disease, 6 742 participants (48.5%) were concerned about impact of smoking on family members, and 6 731 participants (48.5%) were under requested by families.Conclusion:mCessation program can effectively recruit smokers with intention to quit in short time, especially those who were male, young and tobacco dependent.