Methods and participant characteristics in the Cancer Risk in Vegetarians Consortium: a cross-sectional analysis across 11 prospective studies.

Background: The associations of vegetarian diets with risks for site-specific cancers have not been estimated reliably due to the low number of vegetarians in previous studies. Therefore, the Cancer Risk in Vegetarians Consortium was established. The aim is to describe and compare the baseline characteristics between non-vegetarian and vegetarian diet groups and between the collaborating studies.

Physical and mental health of 40,000 older women in England during the COVID-19 pandemic (2020-2021).

Background: To assess factors associated with perceived changes in physical and mental health and with delays in seeking healthcare during the second and third COVID-19 lockdowns in England (2020-2021).

Methods: An online survey of Million Women Study participants collected data on 44,523 women, mean age 76 (SD = 4), October 2020-May 2021. These data were linked to data collected prospectively on Million Women Study participants at recruitment in median year 1998 and at re-surveys in 2011-2013, as well as to hospital admission data from 2017-2019.

A comparative analysis of risk factor associations with interval and screen-detected breast cancers: A large UK prospective study.

The associations of certain factors, such as age and menopausal hormone therapy, with breast cancer risk are known to differ for interval and screen-detected cancers. However, the extent to which associations of other established breast cancer risk factors differ by mode of detection is unclear. We investigated associations of a wide range of risk factors using data from a large UK cohort with linkage to the National Health Service Breast Screening Programme, cancer registration, and other health records.