Age at Natural Menopause in Japanese Women

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  • TAMADA,Taro
    Department of Obstetrics and Gynecology, Jichi Medical School
  • IWASAKI,Hirokazu
    Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Tsukuba University

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  • 本邦女性の閉経年齢

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Objective-To determine the age at natural menopause in Japanese women. Design-Cross-sectional and retrospective study. Subjects-Two thosusand two hundred twenty one women attending gynecological clinics between the ages of 35 and 59 who were born between April, 1929 and March, 1953. Main outcome measures-Age of menopause estimated by the rate of the presence of menses at each age, calculated by probit transformation and by reference to the patient's memory. Results-The median age of menopause based on a cross-sectional study was 50.54, and based on patient's memory is 49.47±3.53(SD). The presence of fibroma uteri significantly delays the age of menopause (Odds ratio=9.41).

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