Zusammenfassung

Neeltje van den Berg,1,2 Sabina Ulbricht,2,3 Thea Schwaneberg,1,2 Kerstin Weitmann,1,2 Franziska Weymar,1–3 Stefan Groß,2,4 Marcus Dörr,2,4 Wolfgang Hoffmann1,2 1Institute for Community Medicine, University Medicine Greifswald, 2German Centre for Cardiovascular Research (DZHK), Partner Site Greifswald, 3Institute of Social Medicine and Prevention, University Medicine Greifswald, 4Department of Internal MedicineB, University Medicine Greifswald, Greifswald, Germany Background: Physical activity (PA) can be assessed by accelerometer monitors. However, a high adherence to wearing this device is essential to obtain valid data. In this study, the influence of different wearing schemes and additional supportive phone calls (SPCs) on adherence was examined. Methods: A randomized study with four groups was conducted in the context of a health examination program among participants aged 40–75years without a history of cardiovascular diseases. Participants were recruited in different settings (general medical practices, job center, and health insurance). The participants were asked to wear an accelerometer for 7 consecutive days according to the wearing scheme “day and night” or “day only” and received or did not receive SPCs. Full adherence was defined as a total wearing time of 98hours (between 8am and 10pm during 7days). A generalized linear model was used to calculate the difference between the maximum possible and the observed adherence. Results: Adherence could be assessed for 249 participants (mean age: 56.40years; standard deviation [SD] 9.83, 40% males). The mean wearing time was 84.04hours (SD 20.75). Participants with the wearing scheme day and night were significantly more adherent than participants with the wearing scheme day only (incidence rate ratio [IRR] 0.63; P=0.005). SPCs had no additional effect on adherence (IRR 0.80; P=0.168). Conclusion: To assess PA, the wearing scheme day and night provides the best possible adherence in this group of participants. Further studies are necessary to examine ...