title: Cardiovascular risk reduction and factors influencing loss to follow-up in the coronary health improvement project.
abstract: BACKGROUND
  This study determined whether the Coronary Health Improvement Project (CHIP) can improve cardiovascular disease risk factors through one year of follow-up and identified factors influencing loss to follow-up.
  
  
  METHODS
  The CHIP program, an intensive four week community-based health education intervention designed to improve coronary risk factors, was evaluated using a quasi-experimental design. Analyses were based on 1,712 community volunteers, ages 30 to 87 from the Rockford, Illinois Metropolitan area. Of the participants, 97.7% completed the lifestyle evaluation at both baseline and after four weeks, and 51% provided data through one year.
  
  
  RESULTS
  Participants showed significant improvements in all cardiovascular risk factors considered (body mass index, resting heart rate, systolic blood pressure, diastolic blood pressure, cholesterol, high-density lipoprotein, low-density lipoprotein, triglycerides, and glucose) after both four weeks and one year. Loss to follow-up was highest among those who were ages 30-39, had a history of diabetes, had a history of being overweight, smoked, lived with a heavy smoker, were physically less active, or were experiencing stress. Those with higher BMI, SBP, DBP, or glucose at baseline were also more likely to be lost to follow-up through one year. Those who failed to improve their BMI, resting heart rate, serum cholesterol, HDL, LDL, triglycerides, or glucose after four weeks were 16%, 9%, 22%, 21%, 16%, 22%, and 15% more likely to be lost to follow-up, respectively.
  
  
  CONCLUSIONS
  The CHIP program improves cardiovascular disease risk factors through one year of follow-up. Poorer health status at baseline is associated with increased loss to follow-up. Failure to improve one or more cardiovascular risk factors after four weeks of intervention is predictive of loss to follow-up through one year.
authors: Department of Health Science, Brigham Young University, Provo, UT 84604, USA.
authors: Ray M
authors: RM
authors: Merrill
authors: Steven G
authors: SG
authors: Aldana
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D005260:Female; D005500:Follow-Up Studies; D006262:Health; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D040242:Risk Reduction Behavior