Hiroyuki Sasai
Biographic Data
| ID | 5473761 |
|---|---|
| NAME | Hiroyuki Sasai |
| GIVEN NAMES | Hiroyuki |
| FAMILY NAME | Sasai |
| SIGNATURE | SASAI H |
| AFFILIATIONS | Tokyo Metropolitan Institute of Gerontology |
| ORCID | 0000-0001-8120-6163 |
| VERIFIED | Yes |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 13 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2019 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 0 |
Association Between Plasma Pentosidine and Skeletal Muscle‐Related Indices in Older Adults Without Diabetes
Development of a predictive model for long-term care and support eligibility certification associated with dementia-related functional impairments
The Long-Term Care Insurance (LTCI) system in Japan provides a framework for assessing dementia-related functional decline, enabling the development of predictive models based on daily functional independence. This study aimed to develop and validate risk prediction models for dementia-related functional impairments using data from the Integrated Research Initiative for Living Well with Dementia Cohort Study (IRIDE-CS), integrating multiple cohor…
Social isolation, regardless of living alone, is associated with mortality
Introduction: Social isolation has been recognized as a contributing factor to negative health outcomes. Although living alone is associated with health-related outcomes, existing findings are inconsistent. It is not the act of living alone that may predict poor health, but rather social isolation that can lead to increased mortality risk. This study investigated the combined associations of social isolation and living alone with mortality among …
Sex-specific factors associated with acceptance of smartwatches among urban older adults
Smartwatches (SW) are wearable devices that support daily life and monitor an individual’s health and activity status. This information is utilized to promote behavior modification, which could help prevent chronic diseases and manage the health of older adults. Despite being interested in SWs, older adults tend to decrease their SW usage as they age. Therefore, understanding the acceptance of SWs among older individuals can facilitate individual…
Activity diversity is associated with the prevention of frailty in community-dwelling older adults
Introduction A prior study showed an association between diversity in daily activities (type, frequency, evenness) and frailty in older adults. However, the causality of this relationship is unclear. Therefore, this study aimed to clarify the relationship between activity diversity and frailty through a 2-year longitudinal study conducted among community-dwelling older adults. Methods We evaluated data from the 2018 and 2020 waves of the Otassha …
Social interaction trajectories and all-cause mortality in older adults
Introduction: This longitudinal study aimed to identify aging trajectory patterns of social interaction by sex and determine the association between these patterns and all-cause mortality. Methods: Participants were 4,065 community-dwelling older adults (1849 men) in Japan, aged 65-89 years, who responded twice or more to a mail survey conducted between 2012 and 2020. Social interaction was examined through the frequency of face-to-face and non-f…
Age- and sex-specific associations between sarcopenia severity and poor cognitive function among community-dwelling older adults in Japan
Introduction This study examined whether the association between sarcopenia severity and cognitive function differed according to sex and age in community-dwelling older adults in Japan. Methods This is a cross-sectional study of older adults (age ≥ 65 years) consisting of five regional cohorts integrated as the Integrated Research Initiative for Living Well with Dementia (IRIDE) Cohort Study. Sarcopenia severity was determined based on the Asian…
Effect modification by geographic area on the association between health literacy and self-rated health
The findings indicate geographic differences in HL levels and effect modification by geographic area on the relationship between HL and self-rated health in the general Japanese population. HL was more strongly associated with self-rated health in eastern areas than in western areas. Further investigation is needed to explore the moderating effects of areal features, including the distribution of primary care physicians and social capital, when f…
Risk Factors of Sports-Related Injury in School-Aged Children and Adolescents
Studies conducting quantitative surveys in school-aged children and adolescents help identify sports-related risk factors for acute and overuse injuries are scarce. This study aimed to quantify the risk factors for sports-related injury in school-aged children and adolescents by school categories. University students ( n = 484) retrospectively recalled their sports experiences and related injuries in a questionnaire according to the following sch…
Factors Associated with Passive Sedentary Behavior among Community-Dwelling Older Women with and without Knee Osteoarthritis
Passive sedentary behavior (SB) may lead to adverse health outcomes; however, it remains unclear whether the factors relevant to passive SB differ between older adults with and without knee osteoarthritis (KOA). This cross-sectional study examined factors associated with passive SB among 688 community-dwelling older women with ( n = 128) and without ( n = 560) KOA. Passive SB (min/day) was assessed using the Japanese-translated version of the Mea…
Sports Specialization and Sports-Related Injuries in Japanese School-Aged Children and Adolescents
Although early sports specialization is associated with sports-related injuries, relevant quantitative studies on young non-elite athletes, the majority of sports participants, are scarce. We described sports specialization time points and the characteristics of sports-related injuries. Undergraduate students at a university in Japan ( n = 830) recalled their history of sports participation from elementary to high school and sports-related injuri…
Relationship of Cardiorespiratory Fitness and Body Mass Index with the Incidence of Dyslipidemia among Japanese Women
Low cardiorespiratory fitness (CRF) and obesity are independent risk factors for dyslipidemia. We investigated the synergistic effects of CRF and obesity on the incidence of dyslipidemia among Japanese women. Of 7627 participants, 927 normolipidemic Japanese women completed a submaximal exercise test, medical examination, and a questionnaire on smoking and alcohol drinking. The incidence of dyslipidemia was defined as having at least one of the f…
Effects of Vibrotactile Feedback on Sedentary Behaviors in Adults
No effective and easily implemented intervention strategies for reducing sedentary behavior have been established. This pilot trial (UMIN000024372) investigated whether vibrotactile feedback reduces sedentary behavior. Twenty-six adults aged 30-69 years who were sedentary ≥8 h/day were randomly assigned to control ( n = 13) or vibration ( n = 13) groups. Participants wore a monitor 9 h daily for seven-day periods at baseline (week zero), during t…
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Relationship of Cardiorespiratory Fitness and Body Mass Index with the Incidence of Dyslipidemia among Japanese Women
Low cardiorespiratory fitness (CRF) and obesity are independent risk factors for dyslipidemia. We investigated the synergistic effects of CRF and obesity on the incidence of dyslipidemia among Japanese women. Of 7627 participants, 927 normolipidemic Japanese women completed a submaximal exercise test, medical examination, and a questionnaire on smoking and alcohol drinking. The incidence of dyslipidemia was defined as having at least one of the f…
Effects of Vibrotactile Feedback on Sedentary Behaviors in Adults
No effective and easily implemented intervention strategies for reducing sedentary behavior have been established. This pilot trial (UMIN000024372) investigated whether vibrotactile feedback reduces sedentary behavior. Twenty-six adults aged 30-69 years who were sedentary ≥8 h/day were randomly assigned to control ( n = 13) or vibration ( n = 13) groups. Participants wore a monitor 9 h daily for seven-day periods at baseline (week zero), during t…
Sports Specialization and Sports-Related Injuries in Japanese School-Aged Children and Adolescents
Although early sports specialization is associated with sports-related injuries, relevant quantitative studies on young non-elite athletes, the majority of sports participants, are scarce. We described sports specialization time points and the characteristics of sports-related injuries. Undergraduate students at a university in Japan ( n = 830) recalled their history of sports participation from elementary to high school and sports-related injuri…
Risk Factors of Sports-Related Injury in School-Aged Children and Adolescents
Studies conducting quantitative surveys in school-aged children and adolescents help identify sports-related risk factors for acute and overuse injuries are scarce. This study aimed to quantify the risk factors for sports-related injury in school-aged children and adolescents by school categories. University students ( n = 484) retrospectively recalled their sports experiences and related injuries in a questionnaire according to the following sch…
Factors Associated with Passive Sedentary Behavior among Community-Dwelling Older Women with and without Knee Osteoarthritis
Passive sedentary behavior (SB) may lead to adverse health outcomes; however, it remains unclear whether the factors relevant to passive SB differ between older adults with and without knee osteoarthritis (KOA). This cross-sectional study examined factors associated with passive SB among 688 community-dwelling older women with ( n = 128) and without ( n = 560) KOA. Passive SB (min/day) was assessed using the Japanese-translated version of the Mea…
Activity diversity is associated with the prevention of frailty in community-dwelling older adults
Introduction A prior study showed an association between diversity in daily activities (type, frequency, evenness) and frailty in older adults. However, the causality of this relationship is unclear. Therefore, this study aimed to clarify the relationship between activity diversity and frailty through a 2-year longitudinal study conducted among community-dwelling older adults. Methods We evaluated data from the 2018 and 2020 waves of the Otassha …
Social interaction trajectories and all-cause mortality in older adults
Introduction: This longitudinal study aimed to identify aging trajectory patterns of social interaction by sex and determine the association between these patterns and all-cause mortality. Methods: Participants were 4,065 community-dwelling older adults (1849 men) in Japan, aged 65-89 years, who responded twice or more to a mail survey conducted between 2012 and 2020. Social interaction was examined through the frequency of face-to-face and non-f…
Age- and sex-specific associations between sarcopenia severity and poor cognitive function among community-dwelling older adults in Japan
Introduction This study examined whether the association between sarcopenia severity and cognitive function differed according to sex and age in community-dwelling older adults in Japan. Methods This is a cross-sectional study of older adults (age ≥ 65 years) consisting of five regional cohorts integrated as the Integrated Research Initiative for Living Well with Dementia (IRIDE) Cohort Study. Sarcopenia severity was determined based on the Asian…
Effect modification by geographic area on the association between health literacy and self-rated health
The findings indicate geographic differences in HL levels and effect modification by geographic area on the relationship between HL and self-rated health in the general Japanese population. HL was more strongly associated with self-rated health in eastern areas than in western areas. Further investigation is needed to explore the moderating effects of areal features, including the distribution of primary care physicians and social capital, when f…
Social isolation, regardless of living alone, is associated with mortality
Introduction: Social isolation has been recognized as a contributing factor to negative health outcomes. Although living alone is associated with health-related outcomes, existing findings are inconsistent. It is not the act of living alone that may predict poor health, but rather social isolation that can lead to increased mortality risk. This study investigated the combined associations of social isolation and living alone with mortality among …
Sex-specific factors associated with acceptance of smartwatches among urban older adults
Smartwatches (SW) are wearable devices that support daily life and monitor an individual’s health and activity status. This information is utilized to promote behavior modification, which could help prevent chronic diseases and manage the health of older adults. Despite being interested in SWs, older adults tend to decrease their SW usage as they age. Therefore, understanding the acceptance of SWs among older individuals can facilitate individual…
Development of a predictive model for long-term care and support eligibility certification associated with dementia-related functional impairments
The Long-Term Care Insurance (LTCI) system in Japan provides a framework for assessing dementia-related functional decline, enabling the development of predictive models based on daily functional independence. This study aimed to develop and validate risk prediction models for dementia-related functional impairments using data from the Integrated Research Initiative for Living Well with Dementia Cohort Study (IRIDE-CS), integrating multiple cohor…
Association Between Plasma Pentosidine and Skeletal Muscle‐Related Indices in Older Adults Without Diabetes
Medicine (12 works) · Gerontology (8 works) · Internal Medicine (6 works) · Demography (5 works) · Physical therapy (5 works) · Psychology (5 works) · Confidence interval (4 works) · Health disparities and outcomes (4 works) · Psychiatry (4 works) · Cohort (3 works)