[Smoking cessation in a population-based cohort study].
OBJECTIVE
To study the incidence rates and the determinants of smoking cessation in a population-based cohort.


METHODS
We used data from the Cornellà Health Interview Survey Follow-up Study. Subjects who declared they were daily smokers at baseline (1994) and had complete follow-up, with information on smoking status in 2002, entered into analysis. We calculated incidence rates and the relative risks of cessation (with 95% confidence intervals) using the Cox model.


RESULTS
Out of 353 daily smokers, 100 quit smoking during the follow-up period (cumulative incidence of 28.3%). The incidence rate of cessation was higher among men (42.34 per 1000 person-years) than among women (24.97 per 1000 person-years), with a relative risk of cessation of 1.69 (95% confidence interval, 1.02-2.79) for men. Age and level of education were associated with a higher relative risk of quitting in men.


CONCLUSIONS
The main determinants for smoking cessation are sociodemographic (sex, age, and level of education).
Servicio de Prevención y Control del Cáncer, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain.
M
M
García
A
A
Schiaffino
J
J
Twose
C
C
Borrell
E
E
Saltó
M
M
Peris
E
E
Fernández
D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D016540:Smoking Cessation / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D013030:Spain / Q000453:epidemiology