Survey of comorbidities for hospitalized patients with cognitive disorders

To provide rationales for the prevention and treatment of elderly patients with cognitive disorders through comparing the comorbidities according to different etiologies and severities. Six groups of different cognitive status were selected. There were 438 normal cognitive subjects (NC) from Jing'an community of Shanghai. Five other groups were from the Memory Clinic at our hospital from June 2006 to June 2010. There were subjective memory complaints (n = 443, SMC), mild cognitive impairment (n = 540, MCI), vascular cognitive impairment-non dementia (n = 119, VCI-ND), Alzheimer's disease (n = 337, AD) and vascular dementia (n = 54, VaD). All participants finished a battery of neuropsychological tests and completed the survey of such comorbidities as stroke, conscious disturbance, hypertension, diabetes, head injuries and excessive drinking. The comorbidity rates of diabetes were 11.4%, 9.9%, 16.1%, 14.2%, 12.4% and 18.5% in 6 groups (NC, SMC, MCI, VCI-ND, AD, VaD) respectively. There were no differences for o