Abstract
Background: Delirium and dementia are both disorders involving global cognitive impairment that can occur separately or at the same time in the elderly.
Objective: The aim of this study was to examine the frequency, correlation, and relative risk between delirium and cognitive impairment in a prospective population study starting at the basal line (onset of delirium) over a period of five years. The secondary aim was to determine any possible correlation between the kind of delirium and a specific type of dementia.
Materials and Methods: We studied 325 patients diagnosed according to the DSM-IV. The neuropsychological, moods and delirium disorders were evaluated with Hamilton Depression Rating Scale, Delirium Rating Scale-Revised-98, MMSE, Rey auditory-verbal learning test, Digit Span, Symbol Digit Modalities Test, Raven Progressive Matrices, ADL, and IADL.
Results: The prevalence of delirium in our population was 89 cases (27.4%): 78 patients (48 women and 30 men) showed evolution toward dementia (mean age was 67.9 ± 6.1 years for men and 68.4 ± 9.1 for women), and 11 patients (5 men and 6 women) presented only isolated delirium without evolution toward cognitive impairment (mean age of men was 68.1 ± 5.1 years and of women 66.4 ± 7.1). The neuropsychological study of the patients with delirium with dementia evolution revealed statistically significant differences over time with a statistically significant intergroup difference and predisposition toward depression.
Conclusion: The association between delirium and cognitive impairment and the possible role of delirium as an early marker of neurodegenerative diseases need to be investigated in the future.
Keywords: Delirium subtype, cognitive impairment, dementia screening, population, encephalopathy, neurodegenerative diseases.
[http://dx.doi.org/10.1016/j.bpa.2012.08.001] [PMID: 23040280]
[http://dx.doi.org/10.1017/S1041610213000574] [PMID: 23651760]
[http://dx.doi.org/10.1002/gps.3814] [PMID: 22513757]
[http://dx.doi.org/10.1097/YCO.0b013e328357f51c] [PMID: 22992543]
[http://dx.doi.org/10.1016/j.bpa.2012.07.003] [PMID: 23040281]
[http://dx.doi.org/10.1001/jama.2010.1013] [PMID: 20664045]
[http://dx.doi.org/10.1093/brain/aws190] [PMID: 22879644]
[http://dx.doi.org/10.1017/S1041610291000819] [PMID: 1687443]
[http://dx.doi.org/10.1111/j.1530-0277.1994.tb00903.x] [PMID: 8198220]
[http://dx.doi.org/10.1001/archneurpsyc.1935.02250180034002]
[PMID: 21560162]
[http://dx.doi.org/10.1017/S1041610212001962] [PMID: 23194775]
[http://dx.doi.org/10.7326/0003-4819-156-12-201206190-00005]
[http://dx.doi.org/10.1001/archinternmed.2012.3203] [PMID: 23403619]
[http://dx.doi.org/10.1016/0022-3956(75)90026-6] [PMID: 1202204]
[http://dx.doi.org/10.1159/000117297] [PMID: 8954306]
[http://dx.doi.org/10.1001/jama.1963.03060120024016] [PMID: 14044222]
[http://dx.doi.org/10.1093/geront/9.3_Part_1.179] [PMID: 5349366]
[http://dx.doi.org/10.1111/j.2044-8260.1967.tb00530.x] [PMID: 6080235]
[http://dx.doi.org/10.1212/WNL.34.7.939] [PMID: 6610841]
[http://dx.doi.org/10.1212/WNL.43.2.250] [PMID: 8094895]
[http://dx.doi.org/10.3233/JAD-2006-9S347] [PMID: 16914880]
[http://dx.doi.org/10.1111/j.1365-2796.2004.01380.x] [PMID: 15324367]
[http://dx.doi.org/10.1016/0165-1781(88)90037-6] [PMID: 3363018]
[http://dx.doi.org/10.1176/jnp.10.2.199] [PMID: 9608409]
[http://dx.doi.org/10.1016/S0033-3182(99)71235-1] [PMID: 10341531]
[http://dx.doi.org/10.1097/CCM.0b013e318250acdc] [PMID: 22584766]
[http://dx.doi.org/10.1002/jhm.1003] [PMID: 22173963]
[http://dx.doi.org/10.1016/j.jagp.2013.04.007] [PMID: 23907068]
[http://dx.doi.org/10.1097/CCM.0b013e318250acc0] [PMID: 22710202]
[http://dx.doi.org/10.1080/13607860903421011] [PMID: 20480420]
[http://dx.doi.org/10.1136/jnnp.2010.208827] [PMID: 20587493]
[http://dx.doi.org/10.1136/jnnp.2008.169078] [PMID: 19237384]
[http://dx.doi.org/10.1097/WCO.0000000000000030] [PMID: 24152819]
[http://dx.doi.org/10.1097/MCC.0b013e328357effa] [PMID: 22941208]
[http://dx.doi.org/10.1097/SLA.0b013e318281b01c] [PMID: 23426334]
[http://dx.doi.org/10.1016/j.bbi.2012.07.012] [PMID: 22884900]
[http://dx.doi.org/10.1002/glia.22350] [PMID: 22674585]
[http://dx.doi.org/10.1186/alzrt118] [PMID: 22647384]
[http://dx.doi.org/10.3233/JAD-2012-120787] [PMID: 22890100]
[http://dx.doi.org/10.1186/cc11901] [PMID: 23245397]
[http://dx.doi.org/10.1186/1742-2094-9-242] [PMID: 23095517]
[http://dx.doi.org/10.1177/0891988713495449] [PMID: 23864592]
[http://dx.doi.org/10.1136/jnnp-2013-306389] [PMID: 24860139]
[http://dx.doi.org/10.1093/gerona/63.7.764]