Placek P J, Taffel S M
Public Health Rep. 1980 Nov-Dec;95(6):540-8.
With National Hospital Discharge Survey data collected by the National Center for Health Statistics as a basis, rates of cesarean section deliveries were computed for the United States and its regions for 1970 through 1978. For each year and within each region, trends were examined according to variations in the mother's color, age, and marital status and in the hospital size (number of beds), the form of hospital ownership, and the length of the mother's hospital stay. Within each region and for each variable considered, cesarean section deliveries rose fairly uniformly. Nationally, C-sections comprised 5.5 percent of all deliveries in 1970, but rose steadily to comprise 15.2 percent of all deliveries in 1978. Overall, 1978 rates were highest in the Northeast, among whites, among women age 30 and over, among married women, in hospitals with 500 beds or more, and in proprietary hospitals. The mean length of the mother's hospital stay in 1978 was 6.7 days for cesarean section deliveries and 3.2 days for other deliveries, down from the mean hospital stay of 7.8 days for C-sections and 3.9 days for other deliveries observed in 1970.
以美国国家卫生统计中心收集的全国医院出院调查数据为基础，计算了1970年至1978年美国及其各地区的剖宫产率。对于每年以及每个地区，根据母亲的肤色、年龄、婚姻状况以及医院规模（床位数）、医院所有制形式和母亲住院时间的变化来研究趋势。在每个地区以及所考虑的每个变量范围内，剖宫产率的上升相当一致。在全国范围内，剖宫产在1970年占所有分娩的5.5%，但稳步上升至1978年占所有分娩的15.2%。总体而言，1978年剖宫产率在东北部最高，在白人中最高，在30岁及以上的女性中最高，在已婚女性中最高，在拥有500张或更多床位的医院中最高，以及在私立医院中最高。1978年剖宫产母亲的平均住院时间为6.7天，其他分娩的平均住院时间为3.2天，低于1970年观察到的剖宫产平均住院时间7.8天和其他分娩平均住院时间3.9天。
