About the Authors

Kay-Tee Khaw, Ailsa Welch, Robert Luben, Nicholas Day
Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom

Nicholas Wareham
Medical Research Council, Epidemiology Unit, Cambridge, United Kingdom

Sheila Bingham
Medical Research Council, Dunn Nutrition Unit, Cambridge, United Kingdom

Corresponding Author

kk101@medschl.cam.ac.uk

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KTK, NW, SB, and ND are principal investigators in the EPIC-Norfolk population study. NW developed and validated the physical activity measures and scales. AW was responsible for nutritional data involved in the physical activity validation and calibration studies. RL is responsible for data management, record linkage, and computing overall. KTK conducted the data analyses, wrote the paper with coauthors, had full access to all of the data in the study, and takes responsibility for the integrity of the data and the accuracy of the data analysis.