Mild Cognitive Impairment Clinical Trial
Official title:
Psychopathological Risk Factors Associated With Conversion From Mild Cognitive Impairment to Dementia
Background: Dementias (Alzheimer's disease and related syndromes), in their sporadic form,
have multifactorial origin. Several risk factors (RF) are currently recognized like the
cardiovascular RF, some genes of susceptibility, but the impact [1] of traumatic life events
(TLE), considered as psychosocial RF (Persson & Skoog, 1996; Charles et al, 2006), [2] of
anxiety and/or depression, [3] of the premorbid personality (Clément et al, 2003) with his
coping strategies, and [4] of the lifestyle (which results from the personality), for the
moment are still underestimated. Dementia disease can be clinically preceded by a mild
cognitive impairment (MCI) (Petersen et al, 1996) which is however potentially reversible.
Purpose: Actually, there is no study concerning the rate of conversion from MCI to dementia
according to the presence or not of TLE. The aim of this study is to assess association
between TLE and conversion rate from MCI to dementia.
Methods: Patients with MCI will be recruited in different memory clinics (Limoges and
others) Primary outcome: Occurrence of dementia according to DSM-IV-TR criteria in MCI
patients according to their cumulated score of TLE measured by EVVIE.
Secondary outcomes: Occurrence of dementia in MCI patients according to various other
psychopathological factors: anxiety, depression, apathy, personality features, alexithymia
and resilience levels and life style.
Study design: Epidemiologic cohort longitudinal and prospective multicenter study.
Eligibility criteria:
- Inclusion criteria:
- Man or woman ≥ 50 years.
- Patient with MCI, of any type, according to the criteria of Petersen et al, 2001.
- Clinical Dementia Rating (CDR) ≤ 0,5.
- Instrumental activities of daily living (IADL)=0.
- MMSE > 26.
- Cognitive and functional capacities well enough in order to avoid a possible
diagnosis of Alzheimer's disease based on clinical evidences (DSM-IV TR) cannot be
done during initial visit.
- Ambulatory patient.
- Visual and auditory capabilities (equipment allowed) and oral or written capacity
able for the development of suitable tests (according to the clinician).
- exclusion criteria:
- Patient with identified neurological problems.
- Patient with developing and/ or non-stabilized psychiatric disease.
- Patient with biological disorders observed during diagnostic process. Number of
subjects: 392 subjects Statistical analysis: Statistical analyses will be
performed by the Unité Fonctionnelle de Recherche Clinique et de Biostatistique
from the Limoges teaching hospital using SAS® V 9.1.3 software (SAS Institute
Cary, NC). Level of significance will be 0.05 for all analyses. Statistical
analyses will be performed and presented in agreement with STROBE guidelines.
Descriptive analyses
Quantitative variables will be described using mean ± standard deviation or median and
interquartile range. Qualitative variables will be described using frequencies, percentages
and 95% confidence intervals assessed with exact method.
A flow chart of patients will be presented.
Main analysis Association between dementia and EVVIE score will be assessed through relative
risk calculation. 95% confidence interval will also be calculated.
;
Observational Model: Cohort, Time Perspective: Prospective
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