Browsing Det helsevitenskapelige fakultet by Author "Oda, Keiji"

Now showing items 1-4 of 4

    • Body mass index at age 20 and subsequent childbearing: The Adventist Health Study-2. 

      Jacobsen, Bjarne Koster; Knutsen, Synnøve Fønnebø; Oda, Keiji; Fraser, Gary E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Some epidemiological, clinical, and laboratory studies suggest that underweight and obesity impact fertility. Methods: This is cross-sectional study of 33,159 North American Adventist women, who were nulliparous at age 20 years and who, as a group, have a healthy lifestyle. Logistic regression analysis was used to assess how body mass index (BMI, kg/m2) at age 20 was related to never ...

    • Obesity at age 20 and the risk of miscarriages, irregular periods and reported problems of becoming pregnant: the Adventist Health Study-2. 

      Jacobsen, Bjarne Koster; Knutsen, Synnøve Fønnebø; Oda, Keiji; Fraser, Gary E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      In a group of 46,000 North-American Adventist women aged 40 and above, we investigated the relationships between body mass index (BMI, kg/m2) at age 20 and the proportion of women who reported at least one miscarriage, periods with irregular menstruation or failing to become pregnant even if trying for more than one straight year. Approximately 31, 14 and 17 %, respectively, reported the three ...

    • Parity and total, ischemic heart disease and stroke mortality. The Adventist Health Study, 1976-1988 

      Jacobsen, Bjarne Koster; Knutsen, Synnøve Fønnebø; Oda, Keiji; Fraser, Gary E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      In a prospective study with information about life style and reproductive factors, we assessed the relationship between parity and total, ischemic heart disease, and stroke mortality. The large majority of the 19,688 California Seventh-day Adventist women included did not smoke or drink alcohol, 31 percent never ate meat and physical activity was relatively high. Cox proportional hazard analysis ...

    • Soy isoflavone intake and the likelihood of ever becoming a mother: the Adventist Health Study-2 

      Jacobsen, Bjarne Koster; Jaceldo-Siegl, Karen; Knutsen, Synnøve Fønnebø; Fan, Jing; Oda, Keiji; Fraser, Gary E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Objectives: As little is known about the possible relationship between the intake of phytoestrogens and female fertility, we investigated the relationship between soy isoflavone intake and the risk of nulliparity and nulligravidity. Methods: A cross-sectional study of 11,688 North American Adventist women aged 30–50 years old with data regarding childbearing. These women were, as a group, characterized ...