title: The DietCompLyf study: a prospective cohort study of breast cancer survival and phytoestrogen consumption.
abstract: DietCompLyf is a multi-centre prospective study designed to investigate associations between phytoestrogens - naturally occurring plant compounds with oestrogenic properties - and other diet and lifestyle factors with breast cancer recurrence and survival. 3159 women with grades I-III breast cancer were recruited 9-15 months post-diagnosis from 56 UK hospitals. Detailed information on clinico-pathological, diet, lifestyle and quality of life is collected annually up to 5 years. Biological samples have also been collected as a resource for subsequent evaluation. The characteristics of the patients and associations between pre-diagnosis intake of phytoestrogens (isoflavones and lignans; assessed using the EPIC-Norfolk UK 130 question food frequency questionnaire) and breast cancer (i) risk factors and (ii) prognostic factors are described for 1797 women who had complete data for all covariates and phytoestrogens of interest. Isoflavone intakes were higher in the patients who were younger at diagnosis, in the non-smokers, those who had breast-fed and those who took supplements. Lignan intakes were higher in patients with a higher age at diagnosis, in ex-smokers, those who had breast-fed, who took supplements, had a lower BMI at diagnosis, lower age at menarche and were nulliparous. No significant associations between pre-diagnosis phytoestrogen intake and factors associated with improved breast cancer prognosis were observed. The potential for further exploration of the relationship between phytoestrogens and breast cancer recurrence and survival, and for the establishment of evidence to improve dietary and lifestyle advice offered to patients following breast cancer diagnosis using DietCompLyf data is discussed.
authors.affiliation: Departments of Molecular and Applied Biosciences and Human and Health Sciences, University of Westminster, 115 New Cavendish St., London, UK.
authors.forename: Ruth
authors.initials: R
authors.lastname: Swann
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Perkins
authors.forename: Louiza S
authors.initials: LS
authors.lastname: Velentzis
authors.forename: Cristian
authors.initials: C
authors.lastname: Ciria
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Dutton
authors.forename: Angela A
authors.initials: AA
authors.lastname: Mulligan
authors.forename: Jayne V
authors.initials: JV
authors.lastname: Woodside
authors.forename: Marie M
authors.initials: MM
authors.lastname: Cantwell
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Leathem
authors.forename: Claire E
authors.initials: CE
authors.lastname: Robertson
authors.forename: Miriam V
authors.initials: MV
authors.lastname: Dwek
mesh_terms: D000328:Adult; D000367:Age Factors; D001942:Breast Feeding; D001943:Breast Neoplasms / Q000175:diagnosis; D004034:Diet Surveys; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D007529:Isoflavones / Q000494:pharmacology*; D017705:Lignans / Q000494:pharmacology*; D008572:Menarche; D008875:Middle Aged; D010298:Parity; D048789:Phytoestrogens / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology*; D011379:Prognosis; D011446:Prospective Studies; D012008:Recurrence; D012907:Smoking; D011795:Surveys and Questionnaires; D017741:Survivors; D006113:United Kingdom
chemical_list: D007529:Isoflavones; D017705:Lignans; D048789:Phytoestrogens; D010936:Plant Extracts