Sarna 2008.

Study characteristics
Methods	Study design: longitudinal cohort Country: USA Data collection period: 1992/1993, 1996/1997, 2000/2001 Registry ID: N/A (cohort)
Participants	Number of participants: N = 158,734; Number included in meta‐analysis: N = 11,809 Sample characteristics (at baseline): Age (mean): range 29 – 71 years; Sex (% male): 0% (0/158,734) Population category: general population; Specific population: female nurses Nicotine dependence: not measured; Baseline cigarettes per day: 16.8 (SD 10.3); Motivation to quit: not selected by motivation to quit
Interventions	Behavioural support for smoking cessation: no behavioural support Pharmacological support for smoking cessation: no pharmacological support Psychotherapeutic or psychoactive support for mental health or mood: did not receive mood management
Outcomes	Definition of cessation used: self‐reported point prevalence (exact definition of abstinence not reported) Cessation definition used for outcome(s) in this analysis: unclear point prevalence Measure of biovalidation: not bioverified Definition of people who continued smoking used: people who currently smoked (self‐reported) Time point(s) at which follow‐up was conducted: baseline, 4 years and 8 years after baseline Outcome category: Psychological Quality of Life (QoL), Social outcome Outcome measure(s): Short Form Health Survey – 36 (SF‐36; mental health composite and social functioning subscale)
Funding source	Supported by grants CA87979, CA50385, and K07 CA92696‐02 (Cooley) from the National Institutes of Health, and a grant from the Robert Wood Johnson Foundation #55769 (Sarna)
Author conflicts of interest	None specified
Notes	Outcome data source: Published data