White E
Am J Public Health. 1987 Apr;77(4):495-7. doi: 10.2105/ajph.77.4.495.
Because there has been a recent trend toward delay of childbearing in the United States, women in the birth cohort of 1945-49 will have an estimated 5 per cent greater incidence of breast cancer, and those in the cohort of 1950-54 an estimated 9 per cent greater incidence compared with the cohort of 1935-39, which had the distribution of age at first birth most favorable for breast cancer risk.
由于美国近期出现了生育延迟的趋势,与1935 - 1939年出生队列相比,1945 - 1949年出生队列的女性患乳腺癌的发病率预计高出5%,而1950 - 1954年出生队列的女性患乳腺癌的发病率预计高出9%,1935 - 1939年出生队列的首次生育年龄分布对乳腺癌风险最为有利。