Singer R B, Strauss D
University of California, Riverside, USA.
J Insur Med. 1997;29(3):172-84.
The large database of the California Department of Developmental Services provides a data source for mortality rates in persons with mental retardation by age, sex, severity, cause and associated conditions.
Data for 1986-1991 were used to determine age-related mortality rates in cases with and without Down's Syndrome, in three severity levels of mental retardation. Distribution data for the data-base population are also given.
In both Down's and non-Down's patient groups excess mortality increased with severity of mental retardation at all ages. In both groups excess mortality tended to decrease with advancing age to age 35-39 years, and to increase at the older ages. The age increase in excess death rate at age 40 years and up was steeper in the patients with Down's Syndrome.
加利福尼亚发展服务部的大型数据库为按年龄、性别、严重程度、病因及相关状况划分的智力发育迟缓者的死亡率提供了一个数据源。
1986年至1991年的数据被用于确定患有和未患有唐氏综合征、三种智力发育迟缓严重程度级别的病例中与年龄相关的死亡率。还给出了数据库人群的分布数据。
在唐氏综合征和非唐氏综合征患者组中，各年龄段的额外死亡率均随智力发育迟缓严重程度的增加而上升。在这两组中，额外死亡率在35至39岁前随年龄增长呈下降趋势，在更高年龄段则上升。40岁及以上患者中额外死亡率随年龄的增长在唐氏综合征患者中更为陡峭。
