Letters Fruit and vegetable consumption and risk of breast cancer

Authors’ reply to Henderson

BMJ 2016; 354 doi: https://doi.org/10.1136/bmj.i4226 (Published 15 August 2016) Cite this as: BMJ 2016;354:i4226
  1. Maryam S Farvid, research associate1,
  2. Walter C Willett, professor1,
  3. A Heather Eliassen, associate professor2
  1. 1Department of Nutrition, Harvard T H Chan School of Public Health, Boston, MA, USA
  2. 2Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
  1. mfarvid{at}hsph.harvard.edu

We appreciate the comments on our study raised by readers of The BMJ.1 As our article acknowledged,2 recall of adolescent diet as an adult will be affected by measurement error, relying primarily on memory. We were unable to conduct ideal validation study of the high school dietary questionnaire—that is, collecting detailed weighed dietary records and biomarkers from high school …

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