title: Influence of psychosocial factors on smoking cessation: longitudinal evidence from the Pro-Saude Study.
abstract: OBJECTIVE
  To evaluate the incidence of smoking cessation and its association with psychosocial factors.
  
  
  METHODS
  Data came from three consecutive waves of the Pro-Saude Study, a longitudinal study of non-faculty civil servants working at a university in Rio de Janeiro, Southeastern Brazil. Inclusion criteria were having participated in Phases 1 and 3 and being a smoker at baseline (Phase 1--1999). Those who had stopped smoking less than a year before the follow-up (Phase 3--2007) were excluded. The final study population consisted of 661 employees (78% of those eligible). Relative risks (RR) of smoking cessation were evaluated through Poisson regression with robust variance.
  
  
  RESULTS
  The cumulative incidence of smoking cessation in eight years of follow-up was 27.7%. Among the psychosocial factors evaluated in the multivariate analysis, only lack of experience of physical violence was associated with higher smoking cessation (RR = 1.67, 95%CI 1.09;2.55).
  
  
  CONCLUSIONS
  The incidence of smoking cessation was high, and the fact that associations were not found with most factors evaluated suggests that much of the effect found is due to the impact of public policies implemented in Brazil over the past decades. The association between no exposure to violence and higher incidence of smoking cessation draws attention to the importance of this factor in tobacco control policies.
authors.affiliation: Departamento de Epidemiologia, Instituto de Medicina Social, Universidade do Estado do Rio de Janeiro, Rio de JaneiroRJ, Brasil.
authors.forename: Claudia S
authors.initials: CS
authors.lastname: Lopes
authors.affiliation: Secretaria-Geral de Controle Externo, Tribunal de Contas do Estado do Rio de Janeiro, Rio de JaneiroRJ, Brasil.
authors.forename: Maria Miranda Autran
authors.initials: MM
authors.lastname: Sampaio
authors.affiliation: Departamento de Epidemiologia, Instituto de Medicina Social, Universidade do Estado do Rio de Janeiro, Rio de JaneiroRJ, Brasil.
authors.forename: Guilherme L
authors.initials: GL
authors.lastname: Werneck
authors.affiliation: Departamento de Epidemiologia e Métodos Quantitativos em Saúde, Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Rio de JaneiroRJ, Brasil.
authors.forename: Dóra
authors.initials: D
authors.lastname: Chor
authors.affiliation: Departamento de Epidemiologia, Instituto de Medicina Social, Universidade do Estado do Rio de Janeiro, Rio de JaneiroRJ, Brasil.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Faerstein
mesh_terms: D000328:Adult; D001938:Brazil; D005260:Female; D006801:Humans; D015994:Incidence; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D016012:Poisson Distribution; D012307:Risk Factors; D012907:Smoking / Q000523:psychology; D016540:Smoking Cessation / Q000523:psychology* / Q000706:statistics & numerical data; D000074606:Smoking Prevention; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires