Grimes D A, Cates W, Selik R M
Fam Plann Perspect. 1981 Jan-Feb;13(1):30-2.
While the number of abortions performed annually in the United States has increased steadily since 1969, the proportion of abortions performed in hospitals has been declining since 1975. Between 1974 and 1977, 1,229,000 abortions were performed at 12 or fewer weeks' gestation in U.S. hospitals, while 2,730,000 were performed in free-standing clinics and doctors' offices. Over the same period, there were 19 deaths which resulted from in-hospital procedures, and 17 from abortions performed in nonhospital facilities. The crude death-to-case rate are 1.5 deaths per 100,000 procedures for hospital abortions, and 0.6 deaths per 100,000 abortions performed in nonhospital facilities. When these rates are adjusted for the presence of preexisting medical conditions and for the concurrent performance of sterilizations, the death-to-case rates for first-trimester abortions performed in both kinds of facilities were about 0.7.
自1969年以来，美国每年实施的堕胎手术数量稳步增加，但自1975年起，在医院进行的堕胎手术比例一直在下降。1974年至1977年期间，美国医院为妊娠12周及以内的孕妇实施了122.9万例堕胎手术，而独立诊所和医生办公室实施了273万例。同一时期，医院手术导致19人死亡，非医院设施的堕胎手术导致17人死亡。医院堕胎手术的粗死亡率为每10万例手术1.5例死亡，非医院设施的堕胎手术为每10万例0.6例死亡。在对已有疾病的存在情况和绝育手术的同时实施情况进行调整后，两种设施中孕早期堕胎手术的死亡率约为0.7。
