Wegman M E
School of Public Health, University of Michigan, Ann Arbor 48109-2029.
Pediatrics. 1994 Dec;94(6 Pt 1):792-803.
A new low in the infant mortality rate was reached again in 1993, at 828.8 deaths per 100,000 live births, a decline of 2% from 848.7 in 1992. Births, marriages, and divorces were all lower, both in number and rate. Deaths and the death rate, however, both increased and, more significantly, the age-adjusted death rate increased. A likely explanation is the occurrence of influenza epidemics in early and late 1993. The rate of natural increase declined 8%, to a level of 6.9 per 1000 population. Final figures on births for 1992 indicate that, for the first time in many years, birth rates to teen-agers declined more among black mothers than white. Increase in birth rate among older mothers continued at a somewhat slower rate than recently; older mothers tended to be better educated than the general population in their age groups. Total fertility rates were higher among mothers of Hispanic origin than among non-Hispanic blacks who, in turn, had higher rates than non-Hispanic whites. Among Hispanics the highest rates were in those of Mexican origin. Unlike recent years, birth rates to unmarried mothers did not increase in 1992. Prenatal care coverage improved, with more mothers seeking care early and fewer receiving late or no care. Electronic and fetal monitoring was performed on more than three-quarters of all births and ultrasound on more than half. Life expectancy decreased slightly, in contrast to recent years. Among major causes of death, increases were recorded in 1993 for chronic obstructive pulmonary diseases, pneumonia and influenza, and HIV infection, the latter having the largest percentage increase. Internationally, infant mortality rates in most other industrialized countries declined further in 1992. Comparatively, as in 1991, 21 other countries had infant mortality rates lower than the United States.
1993年婴儿死亡率再次降至新低,为每10万例活产828.8例死亡,比1992年的848.7例下降了2%。出生、结婚和离婚的数量及比率均有所下降。然而,死亡人数和死亡率都有所上升,更显著的是,年龄调整后的死亡率上升了。一个可能的解释是1993年初和年末发生了流感疫情。自然增长率下降了8%,降至每千人口6.9的水平。1992年的最终出生数据表明,多年来首次出现黑人母亲中青少年生育率的下降幅度超过白人。年龄较大母亲的生育率继续上升,但其速度比最近有所放缓;年龄较大的母亲在其年龄组中往往比一般人群受教育程度更高。西班牙裔母亲的总生育率高于非西班牙裔黑人母亲,而非西班牙裔黑人母亲的总生育率又高于非西班牙裔白人母亲。在西班牙裔中,墨西哥裔的生育率最高。与近年来不同的是,1992年未婚母亲的生育率没有上升。产前护理覆盖率有所提高,寻求早期护理的母亲增多,接受晚期或无护理的母亲减少。超过四分之三的分娩进行了电子和胎儿监测,超过一半的分娩进行了超声检查。与近年来相比,预期寿命略有下降。在主要死因中,1993年慢性阻塞性肺病、肺炎和流感以及艾滋病毒感染的死亡人数有所增加,后者的增幅最大。在国际上,1992年大多数其他工业化国家的婴儿死亡率进一步下降。相比之下,与1991年一样,还有21个国家的婴儿死亡率低于美国。