1. Petersen RC. Mild cognitive impairment as a diagnostic entity. J Intern Med 2004;256:183-194. PMID:
15324362.
2. Artero S, Ancelin ML, Portet F, Dupuy A, Berr C, Dartigues JF, et al. Risk profiles for mild cognitive impairment and progression to dementia are gender specific. J Neurol Neurosurg Psychiatry 2008;79:979-984. PMID:
18450788.
3. Manly JJ, Tang MX, Schupf N, Stern Y, Vonsattel JP, Mayeux R. Frequency and course of mild cognitive impairment in a multiethnic community. Ann Neurol 2008;63:494-506. PMID:
18300306.
4. Luck T, Luppa M, Wiese B, Maier W, van den Bussche H, Eisele M, et al. Prediction of incident dementia: impact of impairment in instrumental activities of daily living and mild cognitive impairment-results from the German study on ageing, cognition, and dementia in primary care patients. Am J Geriatr Psychiatry 2012;20:943-954. PMID:
22706332.
5. Palmer K, Backman L, Winblad B, Fratiglioni L. Mild cognitive impairment in the general population: occurrence and progression to Alzheimer disease. Am J Geriatr Psychiatry 2008;16:603-611. PMID:
18591580.
6. Busse A, Hensel A, Guhne U, Angermeyer MC, Riedel-Heller SG. Mild cognitive impairment: long-term course of four clinical subtypes. Neurology 2006;67:2176-2185. PMID:
17190940.
7. Petersen RC, Roberts RO, Knopman DS, Geda YE, Cha RH, Pankratz VS, et al. Prevalence of mild cognitive impairment is higher in men. The Mayo Clinic Study of Aging. Neurology 2010;75:889-897. PMID:
20820000.
8. Ganguli M, Chang CC, Snitz BE, Saxton JA, Vanderbilt J, Lee CW. Prevalence of mild cognitive impairment by multiple classifications: The Monongahela-Youghiogheny Healthy Aging Team (MYHAT) project. Am J Geriatr Psychiatry 2010;18:674-683. PMID:
20220597.
9. Mitchell AJ, Shiri-Feshki M. Rate of progression of mild cognitive impairment to dementia--meta-analysis of 41 robust inception cohort studies. Acta Psychiatr Scand 2009;119:252-265. PMID:
19236314.
10. Farias ST, Mungas D, Reed BR, Harvey D, DeCarli C. Progression of mild cognitive impairment to dementia in clinic- vs community-based cohorts. Arch Neurol 2009;66:1151-1157. PMID:
19752306.
11. Potter GG, Wagner HR, Burke JR, Plassman BL, Welsh-Bohmer KA, Steffens DC. Neuropsychological predictors of dementia in late-life major depressive disorder. Am J Geriatr Psychiatry 2013;21:297-306. PMID:
23395197.
12. Turner AD, Capuano AW, Wilson RS, Barnes LL. Depressive symptoms and cognitive decline in older african americans: two scales and their factors. Am J Geriatr Psychiatry 2015;23:568-578. PMID:
25214029.
13. Louis ED, Schupf N, Manly J, Marder K, Tang MX, Mayeux R. Association between mild parkinsonian signs and mild cognitive impairment in a community. Neurology 2005;64:1157-1161. PMID:
15824340.
14. Louis ED, Tang MX, Schupf N, Mayeux R. Functional correlates and prevalence of mild parkinsonian signs in a community population of older people. Arch Neurol 2005;62:297-302. PMID:
15710859.
15. Choi J, Myung W, Chung JW, Kang HS, Na DL, Kim SY, et al. Association between functional impairment, depression, and extrapyramidal signs in neuroleptic-free patients with Alzheimer disease. J Geriatr Psychiatry Neurol 2013;26:144-150. PMID:
23733855.
16. Richards M, Stern Y, Mayeux R. Subtle extrapyramidal signs can predict the development of dementia in elderly individuals. Neurology 1993;43:2184-2188. PMID:
8232926.
17. Stern Y, Albert M, Brandt J, Jacobs DM, Tang MX, Marder K, et al. Utility of extrapyramidal signs and psychosis as predictors of cognitive and functional decline, nursing home admission, and death in Alzheimer’s disease: prospective analyses from the Predictors Study. Neurology 1994;44:2300-2307. PMID:
7991116.
18. Bennett DA, Beckett LA, Murray AM, Shannon KM, Goetz CG, Pilgrim DM, et al. Prevalence of parkinsonian signs and associated mortality in a community population of older people. N Engl J Med 1996;334:71-76. PMID:
8531961.
19. Louis ED, Tang MX, Mayeux R. Parkinsonian signs in older people in a community-based study: risk of incident dementia. Arch Neurol 2004;61:1273-1276. PMID:
15313847.
20. Wilson RS, Schneider JA, Bienias JL, Evans DA, Bennett DA. Parkinsonianlike signs and risk of incident Alzheimer disease in older persons. Arch Neurol 2003;60:539-544. PMID:
12707067.
21. Park HK, Na DL, Han SH, Kim JY, Cheong HK, Kim SY, et al. Clinical characteristics of a nationwide hospital-based registry of mild-to-moderate Alzheimer’s disease patients in Korea: a CREDOS (Clinical Research Center for Dementia of South Korea) study. J Korean Med Sci 2011;26:1219-1226. PMID:
21935279.
22. Kim S, Kim MJ, Kim S, Kang HS, Lim SW, Myung W, et al. Gender differences in risk factors for transition from mild cognitive impairment to Alzheimer’s disease: A CREDOS study. Compr Psychiatry 2015;62:114-122. PMID:
26343475.
23. Ahn HJ, Chin J, Park A, Lee BH, Suh MK, Seo SW, et al. Seoul Neuropsychological Screening Battery-dementia version (SNSB-D): a useful tool for assessing and monitoring cognitive impairments in dementia patients. J Korean Med Sci 2010;25:1071-1076. PMID:
20592901.
24. Morris JC. The Clinical Dementia Rating (CDR): current version and scoring rules. Neurology 1993;43:2412-2414.
25. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders Text Revision: DSM-IV-TR. Washington, DC: American Psychiatric Association; 2000.
26. Moon SY, Na DL, Seo SW, Lee JY, Ku BD, Kim SY, et al. Impact of white matter changes on activities of daily living in mild to moderate dementia. Eur Neurol 2011;65:223-230. PMID:
21447954.
27. Noh Y, Lee Y, Seo SW, Jeong JH, Choi SH, Back JH, et al. A new classification system for ischemia using a combination of deep and periventricular white matter hyperintensities. J Stroke Cerebrovasc Dis 2014;23:636-642. PMID:
23867045.
28. Ye BS, Chin J, Kim SY, Lee JS, Kim EJ, Lee Y, et al. The heterogeneity and natural history of mild cognitive impairment of visual memory predominant type. J Alzheimers Dis 2015;43:143-152. PMID:
25079794.
29. Folstein MF, Folstein SE, McHugh PR. “Mini-mental state”. A practical method for grading the cognitive state of patients for the clinician. J Psychiatr Res 1975;12:189-198. PMID:
1202204.
30. Bae JN, Cho MJ. Development of the Korean version of the Geriatric Depression Scale and its short form among elderly psychiatric patients. J Psychosom Res 2004;57:297-305. PMID:
15507257.
31. McKhann G, Drachman D, Folstein M, Katzman R, Price D, Stadlan EM. Clinical diagnosis of Alzheimer’s disease: report of the NINCDS-ADRDA Work Group under the auspices of Department of Health and Human Services Task Force on Alzheimer’s Disease. Neurology 1984;34:939-944. PMID:
6610841.
32. Roman GC, Tatemichi TK, Erkinjuntti T, Cummings JL, Masdeu JC, Garcia JH, et al. Vascular dementia: diagnostic criteria for research studies. Report of the NINDS-AIREN International Workshop. Neurology 1993;43:250-260. PMID:
8094895.
33. Erkinjuntti T, Inzitari D, Pantoni L, Wallin A, Scheltens P, Rockwood K, et al. Research criteria for subcortical vascular dementia in clinical trials. J Neural Transm Suppl 2000;59:23-30. PMID:
10961414.
34. Grambsch PM, Therneau TM. Proportional hazards tests and diagnostics based on weighted residuals. Biometrika 1994;81:515-526.
35. Bae JB, Kim YJ, Han JW, Kim TH, Park JH, Lee SB, et al. Incidence of and risk factors for Alzheimer’s disease and mild cognitive impairment in Korean elderly. Dement Geriatr Cogn Disord 2015;39:105-115. PMID:
25401488.
36. Israeli-Korn SD, Massarwa M, Schechtman E, Strugatsky R, Avni S, Farrer LA, et al. Mild cognitive impairment is associated with mild parkinsonian signs in a door-to-door study. J Alzheimers Dis 2010;22:1005-1013. PMID:
20930290.
37. Kim KW, Park JH, Kim MH, Kim MD, Kim BJ, Kim SK, et al. A nationwide survey on the prevalence of dementia and mild cognitive impairment in South Korea. J Alzheimers Dis 2011;23:281-291. PMID:
21178286.
38. Solfrizzi V, Panza F, Colacicco AM, D’Introno A, Capurso C, Torres F, et al. Vascular risk factors, incidence of MCI, and rates of progression to dementia. Neurology 2004;63:1882-1891. PMID:
15557506.
39. Burns JM, Galvin JE, Roe CM, Morris JC, McKeel DW. The pathology of the substantia nigra in Alzheimer disease with extrapyramidal signs. Neurology 2005;64:1397-1403. PMID:
15851730.
40. Baba M, Nakajo S, Tu PH, Tomita T, Nakaya K, Lee VM, et al. Aggregation of alpha-synuclein in Lewy bodies of sporadic Parkinson’s disease and dementia with Lewy bodies. Am J Pathol 1998;152:879-884. PMID:
9546347.
41. Kish SJ, Chang LJ, Mirchandani L, Shannak K, Hornykiewicz O. Progressive supranuclear palsy: relationship between extrapyramidal disturbances, dementia, and brain neurotransmitter markers. Ann Neurol 1985;18:530-536. PMID:
2416269.
42. Stern Y. Cognitive reserve in ageing and Alzheimer’s disease. Lancet Neurol 2012;11:1006-1012. PMID:
23079557.
43. Stern Y, Albert S, Tang MX, Tsai WY. Rate of memory decline in AD is related to education and occupation: cognitive reserve. Neurology 1999;53:1942-1947. PMID:
10599762.
44. Ye BS, Seo SW, Cho H, Kim SY, Lee JS, Kim EJ, et al. Effects of education on the progression of early- versus late-stage mild cognitive impairment. Int Psychogeriatr 2013;25:597-606. PMID:
23207181.
45. O’Brien JT. Clinical significance of white matter changes. Am J Geriatr Psychiatry 2014;22:133-137. PMID:
24041523.
47. Lopez OL, Kamboh MI, Becker JT, Kaufer DI, DeKosky ST. The apolipoprotein E epsilon 4 allele is not associated with psychiatric symptoms or extrapyramidal signs in probable Alzheimer’s disease. Neurology 1997;49:794-797. PMID:
9305342.