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Published on: October 13, 2016
[Neuropsychiatric symptoms in mild cognitive impairment and Alzheimer's disease]
Pedro Abizanda1, Esther López-Jiménez, Beatriz López-Ramos
1Sección de Geriatría, Complejo Hospitalario Universitario de Albacete, Albacete, España. pabizanda@sescam.jccm.es
Introduction:
To describe the neuropsychiatric symptoms (NPS) in elderly patients with either mild cognitive impairment (MCI) or Alzheimer's disease (AD) and their relevance in the differential diagnosis between the two entities.
Material And Methods:
A total of 179 subjects, aged more than 64 years old, with either MCI (n=90) or AD (n=89) and Global Deterioration Scale stage 4-5 were studied. NPS were assessed using the Neuropsychiatric Inventory scale. We identified the prevalence of the symptoms in each group and determined the risk conferred by each symptom to the differential diagnosis between the two entities.
Results:
Sixty-seven patients with MCI (74.4%) and 82 with AD (92.1%) showed at least one NPS (p<0.01), the most prevalent being depression and apathy in both groups. The mean number of NPS was 2.1 in MCI and 3.2 in AD. NPS were more frequent in patients with more white matter ischemic lesions (WMIL) (p<0.05). The presence of at least one NPS increased the risk of being diagnosed with AD rather than MCI (odds ratio [OR] 3.6: 95% confidence interval [CI] 1.4-5.7; p<0.01) adjusted by age, sex, Mini-Mental State Examination and WMIL. The NPS independently associated with a diagnosis of AD were delusions (OR 4.9; 95% CI 1.3-18.6; p<0.05), apathy (OR 2.5; 95% CI 1.3-4.7 p<0.01), disinhibition (OR 3.1; 95% CI 1.5-6.4; p<0.01) and aberrant motor behavior (OR 6.3; 95% CI 1.7-23.4; p<0.01).
Conclusions:
NPS are frequent in elderly individuals with MCI and mild-moderate AD and may help to differentiate between these two entities.
Insights
Neuropsychiatric symptoms (NPS) are common in mild cognitive impairment (MCI) and Alzheimer's disease (AD). Specific NPS like delusions and apathy can help differentiate between MCI and AD in older adults.
Area of Science:
- Geriatric Medicine
- Neurology
- Psychiatry
Context:
- Neuropsychiatric symptoms (NPS) are prevalent in elderly individuals.
- Distinguishing between mild cognitive impairment (MCI) and Alzheimer's disease (AD) is clinically significant.
- The role of NPS in differential diagnosis for cognitive decline requires further elucidation.
Purpose:
- To describe the prevalence of NPS in elderly patients with MCI or AD.
- To assess the relevance of specific NPS in differentiating between MCI and AD.
- To investigate the association between NPS and white matter ischemic lesions (WMIL).
Summary:
- A study of 179 elderly patients (MCI n=90, AD n=89) found NPS in 74.4% of MCI and 92.1% of AD patients.
- Depression and apathy were the most common NPS in both groups.
- The presence of any NPS increased the odds of an AD diagnosis (OR 3.6), with delusions, apathy, disinhibition, and aberrant motor behavior being independent predictors.
Impact:
- NPS are frequent in both MCI and mild-to-moderate AD.
- Certain NPS significantly aid in the differential diagnosis between MCI and AD.
- Findings contribute to improved diagnostic accuracy and patient management in geriatric cognitive disorders.
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