Qiushi Feng

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Verified

Qiushi verified their affiliation via an institutional email.

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• PhD
• Professor (Associate) at National University of Singapore

Background The oldest-old (those aged ≥80 years) are the most rapidly growing age group globally, and are most in need of health care and assistance. We aimed to assess changes in mortality, disability in activities of daily living, and physical and cognitive functioning among oldest-old individuals between 1998 and 2008. Methods We used data fr...

This book examines China, the world's largest auto market since 2008 and the story of how Chinese auto-makers developed is the story of the Chinese economy in microcosm. It focuses on China's systemically important automobile sector, this book reveals how local institutions have moderated structural changes at national and global levels, and conseq...

Objectives. To examine the trends of leisure activity engagement among the oldest old in China for the past 2 decades. Methods. Our panel data came from the Chinese Longitudinal Healthy Longevity Survey, which systematically asked respondents about their current participation in leisure activities over a 20-year period. The final sample contained 6...

Households are experiencing substantial transformations nowadays. In many societies of the world, the number of households is increasing at a substantially faster rate than that of population growth. These household changes have huge impacts on energy consumption, environment, and sustainable development. Projections of household and living arrange...

Background: It is unclear to what degree centenarians are successful agers. We assess successful aging (SA) and its subtypes in a large Chinese sample. Methods: Based on a large national sample of 18,311 Chinese centenarians, we first estimated the prevalence of SA among centenarians, and then used the Latent Class Analysis to classify centenari...

Objectives The role of Information and Communication Technology (ICT) in later life has received substantial attention, with continuous studies focusing on the digital divide for older persons. Literature usually defines and measures the digital divide by focusing on ICT accessibility, skills, and outcomes. This study attempted to expand this frame...

Given the increasing global aging, understanding the complex association between environmental exposure and health among older people is essential for promoting healthy aging. This review examined the progress in the impact of environmental exposure on health in the elderly, emphasizing the significant contributions of geographical information scie...

Efforts to reform healthcare systems globally have long been driven by the inherent tradeoffs between equity and efficiency. Using a patient referral model, we constructed a cost– benefit matrix for both hospitals and patients. We analyzed the effects of nominal tiered diagnosis and treatment (TDT) using medical institutions' monthly report data fr...

This paper contributes to the first calculation of marital status transition probabilities in Indonesia using the Indonesian Family Life Survey (IFLS), a longitudinal survey conducted since 1993. The sample consists of individuals aged 15 and over in Wave-4 (2007) who were re-interviewed in Wave-5 (2014). The study calculates transition probabiliti...

Many studies indicate that Total fertility rates (TFR(t)) are negatively correlated with life expectancies at birth (e0(t)). We found that complete random-combinations of TFR(t) and e0(t) would result in about 24% and 22.2% of improbable combinations in probabilistic population projections (PPPs) for developing and developed countries, respectively...

In this commentary, we first briefly review the significant utilities of household and living arrangement projections and the main types of methods for conducting household projections. In the second and third sections, we summarize basic ideas, data needed, assessments and applications of ProFamy extended cohort-component methods/software for hous...

Background With the rapid development of digital technology, it is crucial to explore at the individual microlevel whether digital technology can reduce health inequality and discuss potential transmission mechanisms. Methods This study uses data from the 2020 China Health and Retirement Longitudinal Study (CHARLS 2020) and the ordinary least squa...

Since the International Conference on Population and Development (ICPD) in 1994, global initiatives like the Millennium Development Goals (MDGs) and Sustainable Development Goals (SDGs) have evolved from simple population control to a comprehensive focus on human rights, social justice, and sustainable development, emphasizing social equity, gender...

The rapidly aging population demands more public and academic attention to both the physical and psychological needs of older adults. Walking is one of the most favored forms of transportation and exercise for older adults. Hence, the conditions of walkways and the built environment are critical for the development of an older adults-friendly socie...

Primary healthcare plays a pivotal role in enhancing health conditions. In Singapore, such services are predominantly manifested through the implementation of the Community Health Assistance Scheme (CHAS). CHAS is an initiative aimed at providing fundamental preventive and therapeutic services, especially for those seniors and low‐income adults wit...

As the global population ages, cognitive impairment (CI) becomes more prevalent. Tea has been one of the most popular drinks in the world. Several studies have demonstrated that tea consumption has an impact on cognitive function. This study aims to examine the association between tea consumption and cognitive function and explore the potential eff...

INTRODUCTION China has the world's largest number of older adults with cognitive impairment (CI). We aimed to examine secular trends in the prevalence of CI in China from 2002 to 2018. METHODS Generalized estimating equations (GEE) was used to assess changes in CI trend in 44,154 individuals (72,027 observations) aged 65 to 105 years old. RESULTS...

Objectives A short measure of quality of life in old age is essential. The present study examined the factor structure and validity of the 13-item WHOQOL-AGE among the oldest-old. Methods Data came from 1,000 Chinese aged ≥85 years in Singapore. Exploratory and confirmatory factor analyzes were conducted on the WHOQOL-AGE. Regression examined the...

Background: Cognitive decline in older adults has become one of the critical challenges to global health. This study aims to examine both cross-sectional and longitudinal associations of levels of serum 25-hydroxyvitamin D3 (25(OH)D3) (briefed as VD3) concentration and sleep quality/duration, especially their interactions, with risk of cognitive i...

Objective To investigate the impact of the COVID-19 pandemic on life expectancy at birth (e0) for 51 Asian countries and territories from January 1, 2020 to December 31, 2021. Method Based on age-sex-specific mortality used for estimating the changes in e0 for years 2019, 2020, and 2021 from the 2022 revision of the World Population Prospects, we...

Introduction: Although successful aging (SA) studies have examined objective indicators such as disease and disability, physical and cognitive function, and social and productive engagement, as well as subjective indicators such as self-rated health, function, and well-being, the interplay among these indicators is rarely studied. We studied SA pr...

Millions of lives in Asia were lost in the ongoing COVID-19 pandemic, causing a reduction of 1.66 years in life expectancy at birth (e 0) in 2019-2021 and a reduction of 1.41 years in life expectancy at age 60 (e 60). Using the World Population Prospects 2022, we decomposed mortality changes at older ages (ages 60+) that contributed to Asia's reduc...

The oldest-old (those aged ≥ 80 years) are the most rapidly growing age group globally, and are most in need of health care and assistance. This chapter aimed to assess changes in mortality, disability in activities of daily living, and physical and cognitive functioning among oldest-old individuals between 1998 and 2008. We used data from the Chin...

Objectives Although the association between widowhood and mortality is well-established, the impact of widowhood on mortality could differ by social support, gender, and widowhood duration. We studied the association between widowhood and mortality among older Chinese adults in Singapore, and analyzed how social support, gender, and widowhood durat...

The accessibility to healthcare facilities is closely linked to people's health and quality of life, which is especially evident in densely populated metropolises, such as Shanghai, China. Access to healthcare facilities is determined by various spatial and nonspatial factors, such as population, transportation modes, travel time, and the reputatio...

Background The catastrophic health expenditure of older adults results in serious consequences; however, the issue of whether cognitive status and living situations contribute to such financial burdens is uncertain. Our aim was to compare the differences in catastrophic health expenditure between adults living alone with cognitive impairment and th...

The main aim of the study is to validate the factor structure of the Mini-Mental State Examination (MMSE) of China’s older population using the Chinese Longitudinal Healthy Longevity Survey. The validation process used the exploratory factor analysis (EFA) to determine the number of dimensions of MMSE, the confirmatory factor analysis (CFA) to conf...

Investigations on gender variations in the risk factors of cognitive impairment are required to promote future precision medicine among older adults, as well as to contribute to a better understanding of the “male–female health-survival paradox”. With this study, we aimed to investigate the effects of “diet–smoking–gender” three-way interactions on...

Background Air pollution induces neurotoxic reactions and may exert adverse effects on cognitive health. We aimed to investigate whether air pollutants accelerate cognitive decline and affect neurobiological signatures of Alzheimer’s disease (AD). Methods We employed a population-based cohort from the Chinese Longitudinal Healthy Longevity Survey...

Leisure participation is beneficial to various health outcomes. This study examined a comprehensive list of leisure activities in relation to incidence of cognitive impairment among healthy older adults (65+) in China. Using data from the 2002 to 2018 Chinese Longitudinal Healthy Longevity Survey, we found that most of the leisure activities were p...

Background To examine the time trends of leisure activity engagement among young-old adults aged 65–74 in China over a 16-year period. Methods Data for a nationally representative sample of young-old adults was sourced from the 2002–2018 Chinese Longitudinal Healthy Longevity Survey (N = 9504). Generalized estimating equations regressions were imp...

Population aging is sweeping the globe. In the foreseeable future, though being replaced soon by India as the most populous nation, China is and will be holding the largest older population in the world. According to the most recent census of China in 2020, the proportion of Chinese older individuals aged 65 years old and above has approached nearl...

This encyclopedia brings together a comprehensive collection of work highlighting established research and emerging science in all relevant disciplines in gerontology and population aging. It covers the breadth of the field, gives readers access to all major sub-fields, and illustrates their interconnectedness with other disciplines. With more than...

Objectives: We investigated the risk factors associated with toileting disability among older adults in China, focusing on environmental factors (physical, social, and external supports). Methods: Data were drawn from the WHO’s SAGE wave 1. We proposed a conceptual framework to guide the selection of risk factors, and implemented logistic regressio...

Objectives We studied sociodemographic and health factors associated with depression across three age groups of community-dwelling older adults. Methods/Design We used data from 16,785 participants from the third follow-up of the Singapore Chinese Health Study (mean age: 73, range: 61-96 years). We defined depression as having a score of ≥5 using...

Bathing is a major type of disability among older adults. While studies on bathing difficulties have recently started to go beyond the limitations of the human body to examine bathroom amenities; researchers have rarely considered the environment beyond the bathroom. This study explored the regional disparities in bathing disability among older adu...

Background Among older adults, living alone is often associated with higher risk of Emergency Department (ED) admissions. However, older adults living alone are very heterogeneous in terms of health. As more older adults choose to live independently, it remains unclear if the association between living alone and ED admissions is moderated by health...

Objective To describe the characteristics of oldest-old Chinese with disability and their adult-child caregivers, and the extent to which these characteristics were associated with caregiver burden. Methods The study was based on 168 pairs of disabled oldest-old adults and their adult-child caregivers, derived from the Chinese Longitudinal Healthy...

Introduction: Although living alone is associated with social disconnection, older adults could be socially disconnected despite living with others. Understanding the factors associated with social disconnection by living arrangement could help identify vulnerable older adults in the community. We examined the sociodemographic and health factors a...

While having social support can contribute to better health, those in poor health may be limited in their capacity to receive social support. We studied the health factors associated with social support among community-dwelling older adults in Singapore. We used data from the third follow-up interviews (2014–2016) of 16,943 participants of the Sing...

Background For older adults, difficulties in bathing and toileting are often the most prevalent in the index of Activities of daily living (ADL). This study aims to examine how environmental factors are associated with difficulty of bathing and toileting among older adults in rural China. Method The data are from the 2014 Thousand-Village Survey (...

How diet is related with cognition and health has not been systematically examined in Asians whose eating habits are very different from their counterparts in the West and the biological mechanisms underlying such www.aging-us.com 2 AGING links are not well known yet. The diet and healthy aging (DaHA) study is a community-based longitudinal study c...

OARS Multidimensional Functional Assessment Questionnaire (OMFAQ)

Only-Child Older Parents in China

Introduction Ageing is associated with a multitude of healthcare issues including dementia, depression, frailty, morbidity associated with chronic disease and high healthcare utilisation. With Singapore’s population projected to age significantly over the next two decades, it has become increasingly important to understand the disease burden and et...

Background: Traditional medicine is broadly used across Asian societies for various medical conditions and health concerns. However, there remains a wide disparity between users and non-use, which makes it imperative to understand the factors affecting the lay perception and utilization of traditional medicine. This study systematically examined t...

Policymakers and market analysts have long been interested in future trends of households. Among household projection methods, the ProFamy extended cohortcomponent method, as one alternative to the traditional headship-rate method, has recently been extended to the subnational levels. This paper illustrates the application of the ProFamy method at...

Significant variability exists in the trajectories of late-life cognitive decline; however, their associated lifestyle factors remain less studied. We examined these trajectories among elderly participants from the recent five waves (at three-year intervals) of the Chinese Longitudinal Healthy Longevity Study (CLHLS) from 2002 to 2014. Participants...

Background: Despite accumulating evidence on the protective effect of tea consumption against depression, studies specifically focusing on the elderly population are yet limited. This paper examined the association between the frequency and duration of tea drinking and depressive symptoms of older adults by gender and age groups, based on a nation...

Based on the methods of the average period age ratio and the average cohort age ratio, this study systematically assesses age heaping or digit preference in all population censuses of China. Our study finds that the overall age heaping was relatively low in the Chinese censuses; however, there was a notable preference for ages ending with zero afte...

It has been widely postulated in the literature that social capital is positively related to or is the same as trust. The present study presents three theoretical perspectives regarding how individual and organizational social capital may be related to network trust and generalized trust: the compositional element (Putnam), functional equivalence (...

Sensory Disability

As China continues to age rapidly, whether the country should adjust the official retirement age, and if so, when and how, are currently major policy concerns. We examine the impact of postponing the retirement age on the human capital of China in the next four decades. Two critical aspects of human capital—health and education—are incorporated to...

Background China has transitioned from being one of the fastest-growing populations to among the most rapidly aging countries worldwide. In particular, the population of oldest-old individuals, those aged 80+, is projected to quadruple by 2050. The oldest-old represent a uniquely important group—they have high demand for personal assistance and the...

The association between financial status and mortality in older adults is well documented. However, it is unclear whether the association may vary by objective and subjective indicators of financial status. To examine this issue, we used the latest four waves (2005, 2008/2009, 2011/2012, and 2014) of the Chinese Longitudinal Healthy Longevity Surve...

Objectives: Solo-living has far-reaching implications for older adults' well-being. The causal impacts and the pathways of solo-living on health and wellbeing of older adults are still unclear. This study examines the correlates of solo-living and subsequent health outcomes of solo-living among older adults in mainland China. Methods: We draw da...

This study investigates how social exclusion, defined as a multidimensional concept encompassing financial deprivation, social isolation, and a lack of basic social rights, is associated with cognitive impairment of elderly Chinese. Using three waves of the Chinese Longitudinal Healthy Longevity Survey (N = 10,923), we find that rural elderly women...

Objectives: To explore the association between leisure participation and subjective well-being and the role gender in this issue among elderly Chinese in Shanghai, China. Methods: Principal components analysis and logistic regressions are used to analyze the cross-sectional data of the 2013 Shanghai Elderly Life and Opinion Survey that contains...

We examined whether exposure to urban environments was linked with mortality in a longitudinal survey dataset of nearly 28,000 Chinese adults who were 65 years of age or older in the years 2002–2014. Urban life exposure was measured by residential status at birth, current residential status, and urban-related primary lifetime occupation, which gene...

Interviewer-rated health (IRH) and self-rated health (SRH) have strong and independent predictive power for mortality, but their relative predictive power has not been examined among subpopulations. Because individuals from different subpopulations have distinct views, understandings, and judgments about health that influence their criteria and ref...

After a brief introduction to the background, significance and unique features of the centenarian population in China, we describe the Chinese Longitudinal Healthy Longevity Study (CLHLS), which is the world's largest study of centenarians, nonagenarians, octogenarians, and compatible young-old aged 65-79. Based on the CLHLS data and other relevant...

Objectives: We explore the culturally specific meaning of successful aging in Singapore, an ethnically diverse city–state in Asia. We aim to investigate lay perceptions of successful aging among the elderly individuals in Singapore and further examine variations of these perceptions. Methods: We applied a mixed-method research design. Firstly, we...

Objectives: To investigate subtypes of successful aging (SA) based on concordance and discordance between self-rated and researcher-defined measures and their associations with demographic, psychosocial, and life satisfaction factors. Method: We used multinomial logistic regression models to analyze 2013 cross-sectional survey data from 1,962 pe...

Objectives: To investigate psychological resilience (positive adaptations or effective responses to challenges in daily living) and its associations with survival and health among Chinese centenarians. Method: On the basis of the latest 5 waves (2000, 2002, 2005, 2008, and 2011) of a nationwide longitudinal survey in China with more than 7,400 cen...

Objectives. This study examines the potential use of interviewer-rated health (IRH) as a complementary measure of self-rated health (SRH) through a systematic comparison of their components and mortality-predictive powers in the Chinese elderly population. Methods. This study used a nationwide dataset with more than 12,000 adults aged 65 or older...