Determinants of Non- Response to a Second Assessment of Lifestyle Factors and Body Weight in the EPIC-PANACEA Study

BMC Med Res Methodol. 2012 Sep 24;12:148. doi: 10.1186/1471-2288-12-148.

Abstract

Background: This paper discusses whether baseline demographic, socio-economic, health variables, length of follow-up and method of contacting the participants predict non-response to the invitation for a second assessment of lifestyle factors and body weight in the European multi-center EPIC-PANACEA study.

Methods: Over 500.000 participants from several centers in ten European countries recruited between 1992 and 2000 were contacted 2-11 years later to update data on lifestyle and body weight. Length of follow-up as well as the method of approaching differed between the collaborating study centers. Non-responders were compared with responders using multivariate logistic regression analyses.

Results: Overall response for the second assessment was high (81.6%). Compared to postal surveys, centers where the participants completed the questionnaire by phone attained a higher response. Response was also high in centers with a short follow-up period. Non-response was higher in participants who were male (odds ratio 1.09 (confidence interval 1.07; 1.11), aged under 40 years (1.96 (1.90; 2.02), living alone (1.40 (1.37; 1.43), less educated (1.35 (1.12; 1.19), of poorer health (1.33 (1.27; 1.39), reporting an unhealthy lifestyle and who had either a low (<18.5 kg/m2, 1.16 (1.09; 1.23)) or a high BMI (>25, 1.08 (1.06; 1.10); especially ≥30 kg/m2, 1.26 (1.23; 1.29)).

Conclusions: Cohort studies may enhance cohort maintenance by paying particular attention to the subgroups that are most unlikely to respond and by an active recruitment strategy using telephone interviews.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Anthropometry
  • Body Mass Index
  • Body Weight / physiology*
  • Cross-Sectional Studies
  • Eating
  • Energy Intake
  • Europe / epidemiology
  • Female
  • Humans
  • Male
  • Middle Aged
  • Obesity / epidemiology*
  • Prospective Studies
  • Restaurants
  • Risk Factors
  • Sex Factors
  • Weight Gain / physiology
  • Workplace / statistics & numerical data