In the last stages of dementia, persons will be spatially and temporally disoriented.到了痴呆症后期，患者的时空感会发生错乱。Many people with dementia would rather remain at home than be placed in an institution.许多患有痴呆症的人宁愿留在家里也不愿被送进福利院。People with mild cognitive impairment have an increased risk of developing dementia.轻度认知缺损者得痴呆症的风险较高。