Brender J D, Carmichael L, Preece M J, Larimer G C, Suarez L
Tex Med. 1989 Jul;85(7):33-5.
The incidence of anencephalic births among Texas residents for the period 1981 through 1986 is described. The annual incidence of this birth defect varied from 3.8 to 4.3 cases per 10,000 total births (live births and stillbirths). The highest mean annual incidence was found in East Texas and South Texas. Within all ethnic and racial groups studied, females had higher rates of anencephaly than males, and Spanish-surnamed residents had the highest incidence of this defect, with 5.0 cases per 10,000 live births. Mothers with three or more previous live births or a history of stillbirths were more likely to have anencephalic offspring than were those without these documented histories. Differences in the incidence of anencephalic births between Spanish-surnamed and non-Spanish-surnamed whites were not explained by differences in parity.
本文描述了1981年至1986年期间得克萨斯州居民无脑儿出生的发生率。这种出生缺陷的年发生率在每10000例总出生数（活产和死产）中为3.8至4.3例。年平均发生率最高的地区是得克萨斯州东部和南部。在所有研究的种族和民族群体中，女性无脑儿的发生率高于男性，姓氏为西班牙裔的居民这种缺陷的发生率最高，每10000例活产中有5.0例。有三次或更多次既往活产史或死产史的母亲比没有这些记录病史的母亲更有可能生出无脑儿后代。姓氏为西班牙裔和非西班牙裔白人之间无脑儿出生发生率的差异不能用产次差异来解释。
