Browsing Institutt for samfunnsmedisin by Author "Waaseth, Marit"

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    • Direct and indirect risk associated with the use of dietary supplements among persons with dementia in a Norwegian memory clinic 

      Risvoll, Hilde; Giverhaug, Trude; Halvorsen, Kjell H.; Waaseth, Marit; Musial, Frauke (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-12)
      Background: The use of dietary supplements (DS) is common among persons with dementia. Direct risks associated with DS use include adverse events and DS-drug interactions. A direct risk is a risk caused by the treatment itself. Indirect risks are related to the treatment setting, such as the conditions of use, and not to the treatment itself. Because dementia symptoms may reduce a person’s ability ...

    • Endogenous Circulating Sex Hormone Concentrations and Colon Cancer Risk in Postmenopausal Women: a Prospective Study and Meta-Analysis 

      Mori, Nagisa; Keski-Rahkonen, Pekka; Gicquiau, Audrey; Rinaldi, Sabina; Dimou, Niki; Harlid, Sophia; Harbs, Justin; Van Guelpen, Bethany; Aune, Dagfinn; Cross, Amanda J.; Tsilidis, Konstantinos K.; Severi, Gianluca; Kvaskoff, Marina; Fournier, Agnès; Kaaks, Rudolf; Fortner, Renée Turzanski; Schulze, Matthias B.; Jakszyn, Paula; Sánchez, Maria-José; Colorado-Yohar, Sandra M.; Ardanaz, Eva; Travis, Ruth; Watts, Eleanor L.; Masala, Giovanna; Krogh, Vittorio; Tumino, Rosario; Sacerdote, Carlotta; Panico, Salvatore; Buenode-Mesquita, bas; Gram, Inger Torhild; Waaseth, Marit; Gunter, Marc J.; Murphy, Neil (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-28)
      Background - Observational studies have consistently reported that postmenopausal hormone therapy use is associated with lower colon cancer risk, but epidemiologic studies examining the associations between circulating concentrations of endogenous estrogens and colorectal cancer have reported inconsistent results.<p> <p>Methods - We investigated the associations between circulating concentrations ...

    • General practitioners’ role in safeguarding patients with dementia in their use of dietary supplements. A qualitative study 

      Risvoll, Hilde Monica; Risør, Torsten; Halvorsen, Kjell Hermann; Waaseth, Marit; Stub, Trine; Giverhaug, Trude; Musial, Frauke (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-20)
      Objective - The use of dietary supplements (DS) may cause harm through direct and indirect effects. Patients with dementia may be particularly vulnerable. This study aims to explore general practitioners’ (GPs’) experiences with DS use by these patients, the GPs perceived responsibilities, obstacles in taking on this responsibility, their attitudes toward DS, and suggestions for improvements to ...

    • Hormone replacement therapy use and plasma levels of sex hormones in the Norwegian Women and Cancer Postgenome Cohort : a cross-sectional analysis 

      Waaseth, Marit; Bakken, Kjersti; Dumeaux, Vanessa; Olsen, Karina Standahl; Rylander, Charlotta; Figenschaug, Yngve; Lund, Eiliv (Journal article; Tidsskriftartikkel; Peer reviewed, 2008-02-14)
      Background: Hormone replacement therapy use (HRT) is associated with increased breast cancer risk. Our primary objective was to explore hormone levels in plasma according to HRT use, body mass index (BMI) and menopausal status. A secondary objective was to validate self-reported questionnaire information on menstruation and HRT use in the Norwegian Women and Cancer postgenome cohort (NOWAC). Methods: ...

    • Hormone therapy use, sex hormone concentrations and gene expression : The Norwegian Women and Cancer study (NOWAC) 

      Waaseth, Marit (Doctoral thesis; Doktorgradsavhandling, 2010-08-27)
      I følge salgsstatistikken økte forbruket av hormontilskudd kraftig i Norge på 1990-tallet, men avtok fra 2002. Både hormontilskudd og kroppens egenproduserte kjønnshormoner er relatert til kreft hos kvinner, bl.a. brystkreft. Kreft karakteriseres ved ukontrollert celledeling som utvikles gradvis gjennom endringer i genmaterialet. Teknologisk utvikling gjør det mulig å utforske sammenhenger mellom ...

    • Menstrual factors, reproductive history, hormone use, and urothelial carcinoma risk: A prospective study in the EPIC cohort 

      Lujan-Barroso, Leila; Botteri, Edoardo; Caini, Saverio; Ljungberg, Börje; Roswall, Nina; Tjønneland, Anne; Bueno-De-Mesquita, Bas; Gram, Inger Torhild; Tumino, Rosario; Kiemeney, Lambertus A.; Liedberg, Fredrik; Stocks, Tanja; Gunter, Marc; Murphy, Neil; Cervenka, Iris; Fournier, Agnès; Kvaskoff, Marina; Häggström, Christel; Overvad, Kim; Lund, Eiliv; Waaseth, Marit; Fortner, Renée T.; Kühn, Tilman; Menéndez, Virginia; Sánchez, María-José; Santiuste, Carmen; Perez-Cornago, Aurora; Zamora-Ros, Raul; Cross, Amanda J.; Trichopoulou, Antonia; Karakatsani, Anna; Peppa, Eleni; Palli, Domenico; Krogh, Vittorio; Sciannameo, Veronica; Mattiello, Amalia; Panico, Salvatore; van Gils, Carla H.; Onland-Moret, N. Charlotte; Barricarte, Aurelio; Amiano, Pilar; Khaw, Kay-Tee; Boeing, Heiner; Weiderpass, Elisabete; Duell, Eric J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-28)
      <p>Background: Urothelial carcinoma is the predominant (95%) bladder cancer subtype in industrialized nations. Animal and epidemiologic human studies suggest that hormonal factors may influence urothelial carcinoma risk. <p>Methods: We used an analytic cohort of 333,919 women from the European Prospective Investigation into Cancer and Nutrition Cohort. Associations between hormonal factors and ...

    • Pharmacy employees' involvement in safeguarding persons with dementia who use dietary supplements: Results from a survey of Norwegian pharmacies. 

      Risvoll, Hilde; Musial, Frauke; Halvorsen, Kjell H.; Giverhaug, Trude; Waaseth, Marit (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-19)
      <p><i>Background - </i>Community-dwelling persons with dementia commonly use dietary supplements (DS), often without receiving help with the administration. Patient safety is a concern, as DS-drug interactions and adverse events are potential complications. Since many persons with dementia buy their DS in pharmacies, we investigated Norwegian pharmacy employees’ attitudes and professional practice ...

    • Progestin-only and combined oral contraceptives and receptor-defined premenopausal breast cancer risk: The Norwegian Women and Cancer Study 

      Busund, Marit Katinka; Stensland-Bugge, Nora; Braaten, Tonje; Waaseth, Marit; Rylander, Charlotta; Lund, Eiliv (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-19)
      Receptor-defined subtypes of breast cancer represent distinct cancer types and have differences in risk factors. Whether the two main hormonal forms of oral contraceptives (OCs); i.e. progestin-only (POC) and combined oral contraceptives (COC), are differentially associated with these subtypes are not well known. The aim of our study was to assess the effect of POC and COC use on hormone receptor-defined ...