1Graham JE, Rockwood K, Beattie BL, et al. Prevalence and severity of cognitive impairment with and without dementia in an elderly population [ J ]. Lancet, 1997,349 ( 9068 ) : 1793 - 1796.
2Tuokko H, Frerichs R, Graham J, et al. Five-year follow-up of cognitive impairment with no dementia[J]. Arch Neurol,2003,60 (4) :577.
3Petersen RC, Smith GE, Waring SC, et al. Mild cognitive impairment: clinical characterization and outcome [ J ]. Arch Neurol, 1999,56 ( 3 ) : 303 - 308.
4Portet F, Ousset PJ, Visser PJ,et al. Mild cognitive impairment (MC1) in medical practice: a critical review of the concept and new diagnostic procedure, Report of the MCI Working Group of the European Consortium on Alzheimer's Disease[ J]. J Neurol Neurosurg Psychiatry, 2006,77 ( 6 ) :714 - 718.
5Di Carlo A,Lamassa M,Baldereschi M,et al. CIND and MCI in the Italian elderly Frequency, vascular risk factors, progression to dementia[ J]. Neurology, 2007,68(22) : 1909 - 1916.
6De Ronchi D, Berardi D, Menchetti M, et al. Occurrence of cognitive impairment and dementia after the age of 60 : a population- based study from Northern Italy[J]. Dement Geriatr Cogn Disord, 2005,19(2 -3) :97 - 105.
7Di Carlo A, Baldereschi M, Amaducci L,et al. Incidence of dementia, Alzheimer's disease, and vascular dementia in Italy The ILSA Study[ J]. J Am Geriatr Soc, 2002,50( 1 ) :41 -48.
8Monastero R, Palmer K, Qiu C, et al. Heterogeneity in risk factnrs for cognitive impairment, no dementia: population-based longitudinal study from the Kungsholmen Project [ J ]. Am J Gerialr Psychiatry ,2007,15 ( 1 ) :60 - 69.
9Unverzagt FW, Gao S, Baiyewu O, et al. Prevalence of cognitive impairment. Data from the Indianapolis Study of Health and Aging [ J ]. Neurology. ,2001,57 (9) : 1655 - 1662.
10Waite LM, Broe GA, Grayson DA, et al. Preclinical syndromes predict dementia: the Sydney older persons study [ J]. J Neurol Neurosurg Psychiatry, 2001,71 ( 3 ) : 296 - 302.