Reid A H, Ballinger B R, Heather B B, Melvin S J
Br J Psychiatry. 1984 Sep;145:289-93. doi: 10.1192/bjp.145.3.289.
In a study of the evolution of behavioural symptoms in severely and profoundly mentally retarded adults in hospital over a period of six years, items of abnormal behaviour were found to be remarkably persistent. There is a high prevalence rate of psychiatric disorder in this population, when this disorder is defined in a widely descriptive sense. A substantially improved living environment, and increased staff-patient ratios, are prerequisites for improving disturbed behaviour in these patients.
在一项针对重度和极重度成年智障住院患者行为症状六年演变情况的研究中，发现异常行为项目极为持久。从广泛描述性的意义上定义这种疾病时，该人群中精神疾病的患病率很高。大幅改善生活环境以及提高医护人员与患者的比例，是改善这些患者行为紊乱状况的先决条件。
