title: A randomized controlled trial evaluating the effectiveness of a web-based, computer-tailored self-management intervention for people with or at risk for COPD.
abstract: BACKGROUND
  COPD is a leading cause of morbidity and mortality. Self-management interventions are considered important in order to limit the progression of the disease. Computer-tailored interventions could be an effective tool to facilitate self-management.
  
  
  METHODS
  This randomized controlled trial tested the effectiveness of a web-based, computer-tailored COPD self-management intervention on physical activity and smoking behavior. Participants were recruited from an online panel and through primary care practices. Those at risk for or diagnosed with COPD, between 40 and 70 years of age, proficient in Dutch, with access to the Internet, and with basic computer skills (n=1,325), were randomly assigned to either the intervention group (n=662) or control group (n=663). The intervention group received the web-based self-management application, while the control group received no intervention. Participants were not blinded to group assignment. After 6 months, the effect of the intervention was assessed for the primary outcomes, smoking cessation and physical activity, by self-reported 7-day point prevalence abstinence and the International Physical Activity Questionnaire - Short Form.
  
  
  RESULTS
  Of the 1,325 participants, 1,071 (80.8%) completed the 6-month follow-up questionnaire. No significant treatment effect was found on either outcome. The application however, was used by only 36% of the participants in the experimental group.
  
  
  CONCLUSIONS
  A possible explanation for the nonsignificant effect on the primary outcomes, smoking cessation and physical activity, could be the low exposure to the application as engagement with the program has been shown to be crucial for the effectiveness of computer-tailored interventions. (Netherlands Trial Registry number: NTR3421.).
authors.affiliation: Department of Family Medicine, School for Public Health and Primary Care (CAPHRI), Maastricht University Medical Center, Maastricht, Netherlands.
authors.forename: Viola
authors.initials: V
authors.lastname: Voncken-Brewster
authors.affiliation: Department of Family Medicine, School for Public Health and Primary Care (CAPHRI), Maastricht University Medical Center, Maastricht, Netherlands.
authors.forename: Huibert
authors.initials: H
authors.lastname: Tange
authors.affiliation: Department of Health Promotion, School for Public Health and Primary Care (CAPHRI), Maastricht University Medical Center, Maastricht, Netherlands.
authors.forename: Hein
authors.initials: H
authors.lastname: de Vries
authors.affiliation: Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Nagykaldi
authors.affiliation: Department of Methodology and Statistics, CAPHRI, Maastricht University Medical Center, Maastricht, Netherlands.
authors.forename: Bjorn
authors.initials: B
authors.lastname: Winkens
authors.affiliation: Department of Family Medicine, School for Public Health and Primary Care (CAPHRI), Maastricht University Medical Center, Maastricht, Netherlands.
authors.forename: Trudy
authors.initials: T
authors.lastname: van der Weijden
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D020407:Internet; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D009426:Netherlands; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D040242:Risk Reduction Behavior; D012648:Self Care / Q000379:methods*; D012907:Smoking / Q000009:adverse effects; D016540:Smoking Cessation; D000074606:Smoking Prevention; D011795:Surveys and Questionnaires; D013813:Therapy, Computer-Assisted / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome
keywords: COPD; Internet intervention; physical activity; smoking cessation; tailoring