Erkinjuntti T, Wikström J, Palo J, Autio L
Arch Intern Med. 1986 Oct;146(10):1923-6.
Two thousand consecutive patients aged 55 years and older admitted to a department of medicine in a large university hospital were examined for the presence of dementia. The occurrence of moderate and severe dementia was 9.1% for all age groups. It increased from 0.8% in the age group from 55 to 64 years to 31.2% in patients aged 85 years and older. Of the demented patients, 41.4% were delirious at admission, and 24.9% of all delirious patients were demented. Patients with vascular dementia constituted 72.4%, those with primary degenerative dementia 23.0%, and those with specific causes 4.6% of all demented patients. The mean hospitalization time for demented patients was significantly longer, and they needed significantly more daily nursing care, when compared with nondemented patients.
对一家大型大学医院内科收治的2000例年龄在55岁及以上的连续患者进行了痴呆症检查。所有年龄组中、重度痴呆的发生率为9.1%。从55至64岁年龄组的0.8%增至85岁及以上患者的31.2%。在痴呆患者中，41.4%在入院时伴有谵妄，而所有谵妄患者中有24.9%患有痴呆。血管性痴呆患者占所有痴呆患者的72.4%，原发性退行性痴呆患者占23.0%，有特定病因的患者占4.6%。与非痴呆患者相比，痴呆患者的平均住院时间明显更长，且他们每天需要的护理明显更多。
