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Introduction: Mindfulness training (MT) has shown preliminary efficacy as a behavioral treatment for smoking cessation. We examined the effect of a brief-MT intervention on smoking cessation for Chinese women in workplaces in Hong Kong, China.Methods: In this pilot randomized controlled trial, 213 daily smokers were recruited from workplaces and computer-randomized into the intervention (n = 114) or control (n = 99) groups. Participants in both groups received a self-help booklet. Participants in the intervention group additionally attended 2 sessions of a brief-MT workshop. The primary outcome was self-reported 7-day point-prevalence abstinence (PPA) at 6 months. Secondary outcomes were biochemically validated abstinence (exhaled CO < 4 ppm and salivary cotinine < 10 ng/mL) and smoking reduction at 6 months. Analyses were done by intention to treat. We conducted a post-trial qualitative evaluation on participants in the intervention group (n = 14). Data were analyzed thematically.Results: At 6-month follow-up, self-reported 7-day PPA were similar between the intervention and control groups (18.4% vs. 21.2%; P = 0.61). Very few participated in biochemical validation (n = 17), and validated abstinence and smoking reduction rates showed no significant difference (5.3% vs. 11.1%, P = 0.12 and 20.2% vs. 20.2%, P = 1.00, respectively). A posteriori analysis showed that brief-MT participants who were psychologically engaged with the intervention had greater 6-month PPA. Qualitative evaluation showed brief-MT reduced stress but its effectiveness was restrained by the insufficient home practice.Conclusions: This pilot trial on a brief-MT intervention for smoking cessation on Chinese women in workplaces showed feasibility, but improving compliance is needed to maximize the efficacy in future fully powered trials. [ABSTRACT FROM AUTHOR]