Differences between the Canadian and US Diet History Questionnaires and their updated versions. (Letter-to-the-editor re: “Agreement between the National Cancer Institute’s Diet History Questionnaire II and III in a preconception cohort”)

Journal Article Corrected proof Differences between the Canadian and US Diet History Questionnaires and their updated versions. (Letter-to-the-editor re: "Agreement between the National Cancer Institute's Diet History Questionnaire II and III in a preconception cohort") Get access Ilona Csizmadi , Ilona Csizmadi Conceptualization, Writing - original draft, Writing - review & editing Department of Community Health Sciences, University of Calgary, Calgary, AB T2N 4Z6, Canada Corresponding author: Ilona Csizmadi, Department of Community Health Sciences, University of Calgary, Calgary, AB T2N 4Z6 ([email protected]) https://orcid.org/0000-0002-4895-1310 Search for other works by this author on: Oxford Academic PubMed Google Scholar Beatrice A Boucher , Beatrice A Boucher Conceptualization, Writing - original draft, Writing - review & editing Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON M5S 3K1, Canada https://orcid.org/0000-0001-6909-3792 Search for other works by this author on: Oxford Academic PubMed Google Scholar Vikki Ho , Vikki Ho Writing - original draft, Writing - review & editing Carrefour de l'innovation et de l'évaluation en santé, Université de Montréal Hospital Research Centre (CRCHUM), Montreal, QC H2X 0A9, Canada https://orcid.org/0000-0002-0724-7917 Search for other works by this author on: Oxford Academic PubMed Google Scholar Jennifer E Vena , Jennifer E Vena Writing - review & editing Alberta's Tomorrow Project, Cancer Care Alberta, Alberta Health Services, Calgary, AB T2N 5G2, Canada https://orcid.org/0000-0002-6313-1126 Search for other works by this author on: Oxford Academic PubMed Google Scholar Anita Koushik Anita Koushik Conceptualization, Writing - original draft, Writing - review & editing Division of Cancer Epidemiology, McGill University and St. Mary's Research Centre, Montreal, QC H3T 0A2, Canada https://orcid.org/0000-0001-5304-7660 Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, kwaf154, https://doi.org/10.1093/aje/kwaf154 Published: 29 August 2025 Article history Received: 17 June 2025 Revision received: 17 June 2025 Accepted: 23 June 2025 Published: 29 August 2025 Corrected and typeset: 01 September 2025