Περίληψη:
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. © 2012 May et al.
Συγγραφείς:
May, A.M.
Adema, L.E.
Romaguera, D.
Vergnaud, A.-C.
Agudo, A.
Ekelund, U.
Steffen, A.
Orfanos, P.
Slimani, N.
Rinaldi, S.
Mouw, T.
Rohrmann, S.
Hermann, S.
Boeing, H.
Bergmann, M.M.
Jakobsen, M.U.
Overvad, K.
Wareham, N.J.
Gonzalez, C.
Tjonneland, A.
Halkjaer, J.
Key, T.J.
Spencer, E.A.
Hellstrom, V.
Manjer, J.
Hedblad, B.
Lund, E.
Braaten, T.
Clavel-Chapelon, F.
Boutron-Ruault, M.-C.
Rodríguez, L.
Sánchez, M.J.
Dorronsoro, M.
Barricarte, A.
Huerta, J.M.
Naska, A.
Trichopoulou, A.
Palli, D.
Pala, V.
Norat, T.
Mattiello, A.
Tumino, R.
Van Der A, D.
Bueno-De-Mesquita, H.B.
Riboli, E.
Peeters, P.H.
