Zhou 2016.

Study characteristics
Methods	Study design: longitudinal cohort Country: China Data collection period: March 2014 ‐ September 2014 Registry ID: N/A (cohort)
Participants	Number of participants: N = 690; Number included in meta‐analysis: N = 690 Sample characteristics (at baseline): Age (mean): 45.5 years (SD 12.1); Sex (% male): 83.2% Population category: chronic physical condition; Specific population: people (Beijing Anzhen Hospital) with coronary heart disease (CHD) Nicotine dependence: not measured; Baseline cigarettes per day: not measured; Motivation to quit: selected by motivation to quit
Interventions	Behavioural support for smoking cessation: 541 participants attended a smoking cessation clinic but no further detail on support provided Pharmacological support for smoking cessation: 306 participants received a smoking medication ‐ no further detail Psychotherapeutic or psychoactive support for mental health or mood: did not receive mood management
Outcomes	Definition of cessation used: exact definition not reported; participants self‐reported cessation Cessation definition used for outcome(s) in this analysis: unclear definition Measure of biovalidation: not bioverified Definition of people who continued smoking used: people who smoked defined according to the WHO 1997 definition (continuously or cumulatively smoking for 6 months or more during their life), but no explanation of whether and how smoking cessation was verified Time point(s) at which follow‐up was conducted: 6 months Outcome category: Depression Outcome measure(s): Hamilton Anxiety and Depression Scale (HAMD; depression scale)
Funding source	National Key Clinical Specialty Construction Project; Beijing Hospital Administration Bureau of Clinical Medicine Funding
Author conflicts of interest	None specified
Notes	Outcome data source: Published data