title: Content-driven analysis of an online community for smoking cessation: integration of qualitative techniques, automated text analysis, and affiliation networks.
abstract: OBJECTIVE
  We identified content-specific patterns of network diffusion underlying smoking cessation in the context of online platforms, with the aim of generating targeted intervention strategies.
  
  
  METHODS
  QuitNet is an online social network for smoking cessation. We analyzed 16 492 de-identified peer-to-peer messages from 1423 members, posted between March 1 and April 30, 2007. Our mixed-methods approach comprised qualitative coding, automated text analysis, and affiliation network analysis to identify, visualize, and analyze content-specific communication patterns underlying smoking behavior.
  
  
  RESULTS
  Themes we identified in QuitNet messages included relapse, QuitNet-specific traditions, and cravings. QuitNet members who were exposed to other abstinent members by exchanging content related to interpersonal themes (e.g., social support, traditions, progress) tended to abstain. Themes found in other types of content did not show significant correlation with abstinence.
  
  
  CONCLUSIONS
  Modeling health-related affiliation networks through content-driven methods can enable the identification of specific content related to higher abstinence rates, which facilitates targeted health promotion.
authors.affiliation: Sahiti Myneni and Trevor Cohen are with the School of Biomedical Informatics, University of Texas Health Science Center at Houston, and Kayo Fujimoto is with the Division of Health Promotion and Behavioral Sciences, School of Public Health, University of Texas, Houston. Nathan Cobb is with the Division of Pulmonary and Critical Care, Department of Medicine, Georgetown University Medical Center, Washington, DC, and MeYou Health LLC, Boston, MA.
authors.forename: Sahiti
authors.initials: S
authors.lastname: Myneni
authors.forename: Kayo
authors.initials: K
authors.lastname: Fujimoto
authors.forename: Nathan
authors.initials: N
authors.lastname: Cobb
authors.forename: Trevor
authors.initials: T
authors.lastname: Cohen
mesh_terms: D000328:Adult; D005260:Female; D015438:Health Behavior; D058015:Health Communication; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D036301:Qualitative Research; D016540:Smoking Cessation; D012944:Social Support