Yuma Yokoi1,2, Harumasa Takano3, Masuhiro Sakata1, Kazushi Maruo4, Kazuyuki Nakagome5, Hiroshi Matsuda3. 1. Department of Psychiatry, National Center of Neurology and Psychiatry, Kodaira, Japan. 2. University of Yamanashi, Faculty of Medicine, Graduate School, Chuo, Japan. 3. Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Kodaira, Japan. 4. Department of Clinical Trial and Clinical Epidemiology, Tsukuba University, Tsukuba, Japan. 5. National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Japan.
Abstract
BACKGROUND: Neuropsychiatric symptoms (NPS) have been recognized as risk factors for conversion to dementia in patients with mild cognitive impairment (MCI). Early detection of NPS may allow for possible interventions in such patients. The present study used mild behavioural impairment to explore the role of NPS in a wide range of patients, from those who are cognitively intact to those with dementia. METHODS: A total of 234 patients with mild cognitive impairment were followed up for up to 3 years in a Japanese cohort study. Longitudinal data from patients who developed dementia during the study and those who did not were statistically analyzed. RESULTS: Cox regression analysis revealed that only abnormal perception and thought was significant in terms of dementia conversion. Moreover, mixed-effects models indicated that baseline mild behavioural impairment symptoms did not affect cognitive trajectories such as changes in Mini-Mental State Examination or Alzheimer's Disease Assessment Scale-cognitive subscale scores. CONCLUSION: We conclude that only abnormal perception and thought content were risk factors for dementia and that NPS may not lead to deterioration of cognitive function in patients with mild cognitive impairment.
BACKGROUND:Neuropsychiatric symptoms (NPS) have been recognized as risk factors for conversion to dementia in patients with mild cognitive impairment (MCI). Early detection of NPS may allow for possible interventions in such patients. The present study used mild behavioural impairment to explore the role of NPS in a wide range of patients, from those who are cognitively intact to those with dementia. METHODS: A total of 234 patients with mild cognitive impairment were followed up for up to 3 years in a Japanese cohort study. Longitudinal data from patients who developed dementia during the study and those who did not were statistically analyzed. RESULTS: Cox regression analysis revealed that only abnormal perception and thought was significant in terms of dementia conversion. Moreover, mixed-effects models indicated that baseline mild behavioural impairment symptoms did not affect cognitive trajectories such as changes in Mini-Mental State Examination or Alzheimer's Disease Assessment Scale-cognitive subscale scores. CONCLUSION: We conclude that only abnormal perception and thought content were risk factors for dementia and that NPS may not lead to deterioration of cognitive function in patients with mild cognitive impairment.
Authors: Zahinoor Ismail; Byron Creese; Dag Aarsland; Helen C Kales; Constantine G Lyketsos; Robert A Sweet; Clive Ballard Journal: Nat Rev Neurol Date: 2022-01-04 Impact factor: 44.711
Authors: Luis Agüera-Ortiz; Ganesh M Babulal; Marie-Andrée Bruneau; Byron Creese; Fabrizia D'Antonio; Corinne E Fischer; Jennifer R Gatchel; Zahinoor Ismail; Sanjeev Kumar; William J McGeown; Moyra E Mortby; Nicolas A Nuñez; Fabricio F de Oliveira; Arturo X Pereiro; Ramit Ravona-Springer; Hillary J Rouse; Huali Wang; Krista L Lanctôt Journal: J Alzheimers Dis Date: 2022 Impact factor: 4.160