Hikaru Oba

Dr. Hikaru Oba

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 October 2020 in International Journal of Geriatric Psychiatry
Verified
Journal Article
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WSWeiyi Sun
Weiyi Sun
Teruyuki MatsuokaTeruyuki Matsuoka
Teruyuki Matsuoka
HOHikaru Oba
Hikaru Oba
JNJin Narumoto
Jin Narumoto

16 February 2022 in Frontiers in Psychology
Verified
Journal Article
Open access
HOHikaru Oba
Hikaru Oba
RKRyota Kobayashi
Ryota Kobayashi
SKShinobu Kawakatsu
Shinobu Kawakatsu
KSKyoko Suzuki
Kyoko Suzuki
KOKoichi Otani
Koichi Otani
KIKazushige Ihara
Kazushige Ihara
Apathy and depression are frequently observed as behavioral and psychological symptoms of dementia, respectively, and are important for ensuring adequate care. This study aims to explore effective non-pharmacological interventions for apathy and depression with mild cognitive impairment (MCI) and dementia. Five search engines including PubMed, Scopus, CINAHL, PsycInfo, and Web of Science were used to extract relevant studies. Inclusion criteria were studies that involved participants who were diagnosed with MCI or dementia, included quantitative assessments of each symptom, and employed randomized controlled trials. Twenty studies were extracted, with interventions have been conducted in care facilities, the community, and hospitals. Participants in many studies had MCI or mild-to-moderate dementia but were not diagnosed with the subtypes of dementia. Few studies had set apathy and depression as the primary outcomes of non-pharmacological interventions. The findings suggested that emotional and stimulation-oriented approaches to apathy and depression would be useful for people with MCI or mild-to-moderate dementia. It would be helpful for therapists to assess the clinical features of the target symptoms for selecting suitable interventions. Additionally, increasing the number of randomized controlled trials focusing on apathy or depression as primary outcomes would offer a more definite conclusion for future systematic reviews.

HOHikaru Oba
Hikaru Oba
YKYoshihiko Kadoya
Yoshihiko Kadoya
HOHaruka Okamoto
Haruka Okamoto
Teruyuki MatsuokaTeruyuki Matsuoka
Teruyuki Matsuoka
YAYoshinari Abe
Yoshinari Abe
JNJin Narumoto
Jin Narumoto
Although a cognitive impairment such as dementia causes serious economic problems among older people, its impact on economic activities is unclear. This study investigated the actual conditions of economic activities and the current status of the financial support systems among people with dementia and caregivers. One hundred and five dyads participated in the survey. Each dyad consisted of an older person with Alzheimer’s disease and their caregiver. The Mini-Mental State Examination (MMSE) and Functional Assessment Staging (FAST) were used to evaluate the cognitive functions of people with dementia. The caregivers were asked questions concerning the financial status of the household and their utilization of the financial support systems available to people with dementia. Average monthly care costs significantly increased according to the severity of dementia, while household income and spending incurred no significant changes. People with dementia experienced financial problems (including a large amount of erroneously purchased, unnecessary shopping), even though their assets were informally managed by their caregivers. Financial support systems such as adult guardianship and civil trust systems were rarely known and used. We proposed the propagation of the adult guardianship and civil trust systems and the development of contract guidelines for elderly customers including people with dementia.

12 March 2018 in Aging & Mental Health
Verified
Journal Article
Closed access
HOHikaru Oba
Hikaru Oba
TMTeruyuki Matsuoka
Teruyuki Matsuoka
AIAyu Imai
Ayu Imai
HFHiroshi Fujimoto
Hiroshi Fujimoto
YKYuka Kato
Yuka Kato
JNJin Narumoto
Jin Narumoto
Objective: To investigate the effects of interactions between memory impairment, depressive symptoms, and anosognosia. Methods: Anosognosia for memory impairment was assessed in 118 patients with Alzheimer's disease (AD), 47 patients with mild cognitive impairment (MCI), and 17 non-diagnosed controls (NC) using a questionnaire and evaluation of the anosognosia score as the discrepancy between ratings of the patient and a relative. Demographic characteristics, such as the relationship of the patient with the relative and the activities of daily living (ADL) were evaluated. Memory impairment was evaluated with the Rivermead Behavioral Memory Test (RBMT), depressive symptoms were evaluated using the Geriatric Depression Scale (GDS) 15 items version. Results: In the MCI group, a stepwise multiple regression analysis showed an interaction between RBMT and GDS scores, and simple slope analysis indicated that scores for RBMT at low GDS (-1 standard deviation) were positively correlated with self-rated memory impairment. In the AD group, the relationship of the patient with the relative, ADL, and GDS and RBMT scores were associated with the anosognosia score. Conclusion: Patients with MCI who have no depressive symptoms may be able to more accurately evaluate their memory impairment than those who have depressive symptoms and patients with AD. The evaluation by relatives, depressive symptoms or ADL of patients may distort evaluation of anosognosia for memory impairment in patients with AD or MCI. It seems necessary to include not only depression scale scores but also results of objective memory tests in the patients’ medical information for the correct assessment of anosognosia.

11 February 2020 in Journal of Women & Aging
Verified
Journal Article
Open access
YKYoshihiko Kadoya
Yoshihiko Kadoya
MKMostafa Saidur Rahim Khan
Mostafa Saidur Rahim Khan
HOHikaru Oba
Hikaru Oba
JNJin Narumoto
Jin Narumoto
This study examines the socio-economic factors influencing public awareness of the adult guardianship and civil trust systems in Japan. The results of this study show that financial literacy is the most influential factor affecting knowledge of the adult guardianship and civil trust systems. Gender, age, living alone, income, and assets are also found to be related to knowledge about these systems, but they are not consistent. We argue that policy makers should emphasize financial literacy and conduct targeted promotion campaigns to help those living with dementia to continue to participate in and benefit from economic activities.

21 September 2017 in International Psychogeriatrics
Verified
Journal Article
Open access
PDF file
HOHikaru Oba
Hikaru Oba
SSShinichi Sato
Shinichi Sato
HKHiroaki Kazui
Hiroaki Kazui
YNYoshiko Nitta
Yoshiko Nitta
TNTatsuya Nashitani
Tatsuya Nashitani
AKAkio Kamiyama
Akio Kamiyama
Background: There are some existing barriers posed by neuropsychological tests that interfere with the assessment of cognitive functioning by staff who work in long-term care facilities. The purpose of this study was to investigate the feasibility of assessing cognitive function through conversation. Methods: A total of 100 care staff was randomly selected as participants. Each staff member evaluated cognitive function in one to three residents using the Conversational Assessment of Neurocognitive Dysfunction (CANDy), which is a screening test for dementia using conversation. Other scales used were the Mini-Mental State Examination (MMSE), Behavioral Pathology in Alzheimer’ s Disease (BEHAVE-AD), and quality-of-life questionnaire for the elderly with dementia (QOL-D). Results: A total of 80 care staff members and 158 residents were analyzed. When the CANDy involved an evaluation based on face-to-face communication, it demonstrated significant correlations with the MMSE, BEHAVE-AD, and several indices of the QOL-D (e.g. negative affect and actions, communication ability, restless, and spontaneity and activity). In contrast, when the CANDy involved an evaluation based on an impression of a typical conversation, it only demonstrated significant relationships with the MMSE and the spontaneity and activity index of the QOL-D. Conclusions: Conversational assessment is a useful means to assess cognitive functioning and to promote interactions between residents and care staff in long-term care facilities.