## Abstract In 511 nulliparous women aged 15β19 years and 347 aged 30β39, an analysis has been undertaken of the relationship of urine concentrations of the three principal estrogens to age, age at menarche and Quetelet's index of adiposity. The analysis was undertaken by means of multiple regressi
Age at menarche and breast cancer risk in nulliparous women
β Scribed by P. H. M. Peeters; A. L. M. Verbeek; A. Krol; M. M. M. Matthyssen; F. Waard
- Publisher
- Springer US
- Year
- 1995
- Tongue
- English
- Weight
- 497 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0167-6806
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## Abstract An analysis is undertaken of the frequency of ovulation in 17 groups of women aged 15 to 19 who had been the subjects of other studies. A urine specimen of at least 8 h accumulation had been provided on the 20th or 21st day of a menstrual cycle by 681 women. Analysis is restricted to 43
Age at menarche is one of the few established risk factors for breast cancer; identification of its exogenous determinants could throw light on the origins of breast cancer. We have undertaken an epidemiologic study in Greece to ascertain whether: I ) energy intake, an indicator of physical activity