Pfeffer R I
Am J Epidemiol. 1977 Jan;105(1):21-9. doi: 10.1093/oxfordjournals.aje.a112351.
Fifteen per cent of postmenopausal women living in a retirement community used oral estrogens. Both use and new-use continued in the seventh, eighth and ninth decades of life, although use and age-specific use-prevalence declined after age 70. Mean duration of most recent continuous use was 105 months. Vaginal estrogenic preparations were used infrequently, briefly, and usually by women who also used oral estrogens in the same year. The most commonly used oral estrogenic preparation was conjugated equine estrogens (Premarin).
居住在退休社区的绝经后女性中有15%使用口服雌激素。在70岁、80岁和90岁年龄段，雌激素的使用及新使用者仍持续存在，尽管70岁以后使用情况及特定年龄的使用患病率有所下降。最近一次持续使用的平均时长为105个月。阴道雌激素制剂使用频率低、使用时间短，且通常是同年也使用口服雌激素的女性。最常用的口服雌激素制剂是结合马雌激素（倍美力）。
