Xiang Qi

Faculty

Xiang Qi headshot

Xiang Qi

PhD RN

Assistant Professor

1 212 992 5797

433 First Ave
New York, NY 10010
United States

Xiang Qi, PhD, RN, is an Assistant Professor at NYU Rory Meyers College of Nursing. His research sits at the intersection of gerontology, social epidemiology & psychiatry, and geriatric oral health. He conducts interdisciplinary research focusing on social disparities of healthy aging and longevity that crosscuts a range of areas in social isolation & loneliness, immigration, and neighborhood environment. The goal of Qi’s work is to reduce health disparities in Alzheimer’s disease and related dementia in the US and globally. Qi is an expert in data science and quantitative methodology, including machine learning, multilevel modeling, and causal inference, and has extensive experience working with large-scale data analyses as well as analyzing electronic health records to understand the social determinants of health disparities.

Qi is the Principal Investigator on NIH-funded projects investigating the disparities in cardiometabolic diseases, mental health, and cognitive health across older Asian American ethnic groups. Prior to joining the faculty at NYU Meyers, he served as a Research Scientist on the “NYUCI-ES: Psychosocial Intervention to Improve Health Outcomes for Chinese and Korean ADRD Caregivers project (P50MD017356)” at the Rutgers-NYU Center for Asian Health Promotion and Equity. He also works on NIH-funded projects to elucidate the neurobiological pathways on the associations between poor oral health and dementia.

Among his many honors, Qi has received the Douglas Holmes Emerging Scholar Paper Award, the ESPO Best Poster Award, and the Minority Issues in Gerontology Student Poster Award, from the Gerontological Society of America. He has also been recognized with the 2022-2023 Outstanding PhD Dissertation Award from NYU Meyers. Additionally, Qi has received the FIRE Doctoral Student Research Leadership Award from the New York Academy of Medicine. His work has been featured in numerous media outlets, including U.S. News & World Reports, Yahoo!, Cable News Network (CNN), Science News, PsyPost, Daily Nurse, Dental Tribute, National Institute of Aging, Dentistry Today, and Neuroscience News. Qi’s research on the associations between social isolation, loneliness, and cognitive health has garnered significant attention and recognition.

Qi earned his PhD from New York University. He completed his Bachelor of Science at Fudan University in Shanghai, China, which included an exchange program at the Department of Neurobiology, Physiology & Behavior, University of California, Davis.

PhD, Nursing Research and Theory Development, New York University
Exchange Program, Neurobiology, Physiology & Behavior, University of California, Davis
BS, Fudan University

Gerontology
Oral-systemic health
Public and Global Health
Underserved populations

Alzheimer’s Association International Society
New York Academy of Medicine
Sigma Theta Tau Nursing Honor Society
Gerontological Society of American
Eastern Nursing Research Society

Research Poster Award, Health Equity Action Network (2024)
Minority Issues in Gerontology Student Poster Award, Gerontological Society of American (2023)
2022-2023 Outstanding PhD Dissertation Award, NYU Rory Meyers College of Nursing (2023)
The Emerging Scholar and Professional Organization – Carol Schutz Student Travel Award, Gerontological Society of American (2022)
Minority Issues in Gerontology Student Poster Award, Gerontological Society of American (2022)
Douglas Holmes Emerging Scholar Paper Award, Gerontological Society of American (2022)
The Emerging Scholar and Professional Organization – Best Poster Award, Gerontological Society of American (2022)
FIRE Doctoral Student Research Leadership Award, New York Academy of Medicine (2022)
Student Registration Award, Gerontological Society of American (2021)
Excellent Graduate of Shanghai, Shanghai Municipal Education Commission (2019)
Research and Innovation Award, Fudan University, Fudan University, Shanghai, China (2018)
National Undergraduate Scholarship, Ministry of Education of China (2018)
Overseas Exchange Outstanding Student Scholarship, Fudan University, China (2017)
The First Prize Scholarship, Fudan University, China (2016)
Excellent Student Leader, Fudan University, China (2015)

Social context matters: Neighborhood environment as a moderator of the longitudinal relationship between edentulism and cognitive function among older adults in the United States

Liu, R., Qi, X., Mao, W., Luo, H., Xu, Z., & Wu, B. (2025). Archives of Gerontology and Geriatrics, 133. 10.1016/j.archger.2025.105806
Abstract
Abstract
Background: Previous research has shown poor oral health and neighborhood environment are both risk factors for cognitive decline among older adults. Little research has assessed the synergistic effects of poor oral health and neighborhood environment on cognitive health. This study examined whether neighborhood environment moderates the relationship between edentulism and cognitive function over time. Methods: Using data from the Health and Retirement Study, we analyzed 9,994 adults aged 60 and older with 39,976 person-wave observations over 14 years (2006–2020). Cognitive function was measured using the modified Telephone Interview for Cognitive Status. Edentulism status was self-reported complete tooth loss. Neighborhood environment included perceived neighborhood cohesion and disorder. We used linear mixed-effect models to examine the moderation effect of neighborhood environment on the association between edentulism and cognitive function over time. Results: Edentulous participants (22.4 %) showed an accelerated decline over time in cognitive function compared to dentate participants (β = -0.57, 95 % CI: -0.98, -0.16). The analysis revealed that neighborhood cohesion moderated the relationship between edentulism and cognitive function over time (β = 0.08, 95 % CI: 0.01, 0.15). Specifically, among individuals reporting higher neighborhood cohesion, the negative effect of edentulism on cognitive decline was attenuated. Neighborhood disorder had no significant associations with cognitive function. Conclusions: This study demonstrates the relationship between edentulism and cognitive function varies by levels of neighborhood cohesion. The findings highlight the significance of neighborhood context in understanding the relationship between oral health and cognitive aging and suggest interventions addressing community environment may be particularly relevant for older adults with oral health challenges.

Surge of mental health issues of Chinese Americans under both popular and policy-driven racism

Qi, X. (2025, January 1). In The Lancet Regional Health - Americas (Vols. 41). 10.1016/j.lana.2024.100941

Trajectory of Cognitive Decline Across Different Racial/Ethnic Groups: The Role of Edentulism

Liu, R., Qi, X., Luo, H., & Wu, B. (2025). Research on Aging, 47(5), 297-307. 10.1177/01640275251315850
Abstract
Abstract
This study examines whether age-related cognitive decline varies by race/ethnicity and how edentulism moderates these effects. Data from the Health and Retirement Study (2006–2020), including 23,669 respondents aged 51 and above across 189,352 person-wave observations were analyzed. Of all respondents, 13.4% were edentulous at baseline, with 65.4% identified as non-Hispanic White, 20.5% non-Hispanic Black, and 14.18% Hispanic. Results from linear mixed-effect models indicated that compared to non-Hispanic Whites, Hispanic and non-Hispanic Black participants exhibited lower baseline cognition scores but slower cognitive decline with age. For edentulous Hispanic participants, this slower rate of decline was attenuated by 0.03 units per year (95% CI: −0.06, −0.01, p =.049). The findings highlighted the need for targeted interventions and policies to improve oral health, particularly for Hispanic populations. Addressing oral health disparities could help mitigate cognitive decline in this group and reduce cognitive health disparities across racial/ethnic groups.

Trends of Oral Health Status of Older Adults by Immigration Status in the United States: 1999–2018

Luo, H., Wu, B., Qi, X., & Moss, M. E. (2025). Journal of Public Health Dentistry. 10.1111/jphd.12679
Abstract
Abstract
Introduction: This study examined oral health trends of older immigrants in the US from 1999 to 2018 and disparities between immigrants and non-immigrants across different races/ethnicities. Methods: Data were from the 1999–2018 National Health and Nutrition Survey (NHANES). Outcome variables were self-reported poor oral health and significant tooth loss (i.e., < 20 permanent teeth). Participants were categorized into three groups as US natives, naturalized citizens, or noncitizen residents. The analytical sample comprised 13,424 older adults (ages 60+), including 10,087 US natives, 2280 naturalized citizens, and 1057 noncitizen residents. We assessed the trends in poor oral health and significant tooth loss across the three groups and conducted analyses stratified by race/ethnicity to examine within-group disparities. Results: From 1999 to 2018, noncitizen residents consistently showed higher rates of poor oral health and significant tooth loss compared to US natives and naturalized citizens. Multiple logistic regression model results showed that naturalized citizens were less likely (AOR = 0.79, p = 0.03) to report poor oral health. Stratified analyses by racial/ethnic groups showed that among Blacks, naturalized citizens were less likely to report poor oral health (AOR = 0.59, p = 0.02) than Blacks who were born in the US. Conclusion: While overall oral health improved among older immigrants from 1999 to 2018, oral health disparities persisted, especially between noncitizen residents and US natives. There were significant differences in oral health between Black immigrants and their US-born counterparts. Future research is needed to corroborate these findings and monitor the trend of oral health disparities.

Unequal Effects of the Lockdown on Mental Health in Shanghai: The Moderating and Mediating Role of Neighborhood Environment and Online Social Connections

Pei, Y., Qi, X., Li, G., Tang, W., Huang, K., Hall, B. J., & Wu, B. (2025). Journal of Community Psychology, 53(1). 10.1002/jcop.23177
Abstract
Abstract
The COVID-19 pandemic profoundly impacted population mental health worldwide. Few studies examined how the neighborhood environment and online social connections might influence the social gradient in mental health during the pandemic lockdown. We aim to examine the moderating and mediating role of neighborhood environment and online social connections in the association between socioeconomic status (SES) and mental health outcomes. We conducted a cross-sectional online survey of 3763 Shanghai residents during the COVID-19 lockdown between April 29 and June 1, 2022. Employing OLS linear regression analyses, our findings reveal that SES was negatively associated with depressive symptoms (B = 0.173, p < 0.001) and anxiety (B = 0.147, p < 0.001). The findings supported our hypotheses that this disparity in mental health was partially mediated by neighborhood social capital, community management, and the extent of online social connections measured by the frequency of social connection through the social media WeChat (all p < 0.05). Additionally, neighborhood social capital, community management, and online social connections also mitigated SES-driven mental health inequalities (all p < 0.05). The study underscores the significance of the neighborhood environment and online social interactions in amplifying SES-related mental health effects, offering valuable insights for urban planning and health equity strategies.

Adult day services: a potential antidote to social isolation and loneliness in marginalized older adults

Sadarangani, T., Fernandez Cajavilca, M., Qi, X., & Zagorski, W. (2024). Frontiers in Public Health, 12. 10.3389/fpubh.2024.1427425
Abstract
Abstract
Loneliness and social isolation affect more than 1 in 4 community-dwelling older adults in the United States, who may also require long-term care support. Despite being seen as a solution to the long-term care crisis, most older adults prefer to age in place rather than using skilled nursing facilities. However, in-home care is unsustainable due to a shortage of direct care workers and may exacerbate social isolation by confining older adults to their homes. Adult Day Services (ADS) addresses both issues. ADS provides care to adults with physical, functional, and or cognitive limitations in non-residential, congregate, community-based settings. ADS also provides daily cognitive and physical stimulation, often with medical support, in a social and supported environment, centered around the needs and preferences of participants. Before the COVID-19 pandemic, nearly 5,000 ADS centers were widely available. However, with limited public support, the ADS industry has struggled as demand by the growing number of older adults and families need health and social support. The ADS industry must be recognized for its unique ability to buffer social isolation and loneliness in chronically ill older adults while serving as an effective platform for chronic disease management. This perspective piece highlights the critical role of ADS centers in reducing loneliness and social isolation and promoting healthy equity. We also explore the benefits of ADS, the financial, policy, and societal barriers to utilizing ADS, and the potential solutions to ensure its sustainability and growth.

Age at diagnosis of diabetes, obesity, and the risk of dementia among adult patients with type 2 diabetes

Qi, X., Zhu, Z., Luo, H., Schwartz, M. D., & Wu, B. (2024). PloS One, 19(11). 10.1371/journal.pone.0310964
Abstract
Abstract
Background While Type 2 Diabetes Mellitus (T2DM) prevalence is increasing among younger individuals, few studies have examined how age at T2DM diagnosis relates to dementia risk in diabetic populations. We aimed to investigate the association between age at T2DM diagnosis and subsequent dementia risk, and to determine whether obesity moderates this relationship. Methods We conducted a prospective cohort study using data from the Health and Retirement Study (2002–2016) matched with its 2003 Diabetes Mail-Out Survey. The study included 1,213 dementia-free adults aged ≥50 with diagnosed T2DM. Primary exposures were age at T2DM diagnosis (categorized as <50, 50–59, 60–69, and ≥70 years) and obesity status (BMI ≥30 kg/m2). The outcome was incident dementia, assessed using the Telephone Interview for Cognitive Status. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs), adjusting for sociodemographic factors, health behaviors, health status, and diabetes medication use. Results Over a median follow-up of 10 (interquartile range, 6–14) years, 216 (17.8%) participants developed dementia. Compared to participants diagnosed with T2DM at age ≥70 years, those diagnosed at younger ages had increased dementia risk: HR 1.70 (95% CI, 1.03–2.80) for 60–69 years, 1.72 (95% CI, 1.06–2.79) for 50–59 years, and 1.90 (95% CI, 1.14–3.18) for <50 years. Obesity significantly moderated this relationship, with obese individuals diagnosed with T2DM before age 50 showing the highest dementia risk (HR 3.05; 95% CI 1.23–7.56) compared to non-obese individuals diagnosed at ≥50 years. Conclusions Younger age at diagnosis of T2DM was significantly associated with a higher risk of dementia, particularly among individuals with obesity. Interventions specifically targeting obesity may be more effective in preventing dementia for adults with a younger onset of T2DM.

Association of Gum Treatment with Cognitive Decline and Dementia Risk among Older Adults with Periodontal Symptoms: A 12-Year Prospective Cohort Study

Zhu, Z., Wang, K., Zheng, Y., Li, A., Wu, B., & Qi, X. (2024). Neuroepidemiology, 1-10. 10.1159/000540086
Abstract
Abstract
INTRODUCTION: This study examines the associations of gum treatment with cognitive decline and dementia risk among older adults with periodontal symptoms in the USA.METHODS: A cohort of 866 adults aged ≥50 with periodontal symptoms was recruited for the 2008 Health and Retirement Study "Dental Health Experimental Module" and followed until 2020. Cognitive function was assessed with the Telephone Interview for Cognitive Status (TICS). Dementia status was ascertained with the Langa-Weir algorithm based on TICS scores and proxy assessments. Linear mixed-effects model and multivariable Cox regression models were utilized to analyze the associations of gum treatment with cognitive decline and the risk of dementia, respectively.RESULTS: Of 866 participants (mean age 67.7, 61.4% women), 105 (12.1%) developed dementia with a median follow-up of 9 (IQR, 6-10) years. The dementia incidence rates were lower in the group with gum treatment (7.4 vs. 12.9 per 1,000 person-years). Compared with participants who did not have gum treatment, those with gum treatment experienced a decline in TICS score that was on average 0.025 (95% CI, 0.005-0.044) points less per year and a 38% lower incidence of dementia (hazard ratio, 0.62; 95% CI, 0.41-0.93). These associations were consistent across participants with a different severity of periodontal symptoms and sociodemographic characteristics (age, sex, race, ethnicity, and education) except for income levels.CONCLUSION: Prompt gum treatment for older adults with periodontal symptoms may be beneficial for their cognitive health.

Denture use and a slower rate of cognitive decline among older adults with partial tooth loss in China: A 10-year prospective cohort study

Qi, X., Zhu, Z., Pei, Y., & Wu, B. (2024). Aging Medicine, 7(6), 781-789. 10.1002/agm2.12383
Abstract
Abstract
Objective: Denture use has been shown to improve nutritional intake and diet quality in people with tooth loss. Despite evidence linking tooth loss and dementia, few studies have examined the association between denture use and cognitive decline. We investigated the relationship between denture use and cognitive decline among Chinese older adults with tooth loss. Methods: We analyzed data from the Chinese Longitudinal Healthy Longevity Survey 2008–2018, including 27,708 community-dwelling dentate and edentulous (i.e., who have lost all natural teeth) older adults aged 65 and older. Cognitive function was assessed using the Mini-Mental State Examination from 2008 to 2018. Linear mixed-effect models were employed to assess the association of denture use with baseline cognitive function and rate of cognitive decline, adjusting for sociodemographic characteristics, health-related behavior, and health status. Subgroup analyses evaluated differences in associations among dentate participants with varying degrees of tooth loss (1–9, 10–19, 20–31). Results: Compared to non-denture users, dentate participants who used dentures had better baseline cognitive function (β, 1.032; 95% CI, 0.813–1.251; p < 0.001) and a slower annual decline in cognitive function (β, 0.127; 95% CI, 0.047–0.206; p < 0.01). For edentulous participants, denture use was associated with higher baseline cognitive function (β, 3.063; 95% CI, 2.703–3.423; p < 0.001) but not with the rate of cognitive decline (β, 0.011; 95% CI, –0.082 to 0.105; p = 0.818). Results remained consistent across subgroups of dentate participants with various degrees of missing teeth. Conclusions: Denture use may help protect against cognitive decline in older adults with partial tooth loss. This study highlights the potential importance of prosthodontic rehabilitation in preserving cognitive health. Further research is needed to establish a causal relationship between denture use and cognitive function.

How do Asian American young adults influence the health of family members? Structural equation modeling of age, acculturation, interactivity, and closeness

Ali, S. H., Nayak, A., Qi, X., Misra, S., & DiClemente, R. J. (2024). Discover Social Science and Health, 4(1). 10.1007/s44155-024-00128-7
Abstract
Abstract
Family members of Asian Americans (AAs) hold enormous potential as health changemakers to help combat the growing non-communicable disease burden in the community. To inform the development of impactful family-based interventions, there is a need to disentangle the mechanisms behind family influences on health. This study aims to deconstruct how interactivity and closeness mediate the association of age and acculturation with how much AA young adults perceive themselves to influence the health behaviors of family members. 502 AA young adults (48.0% East Asian, 20.9% South Asian, 23.1% Southeast Asian) were recruited in March 2021 to participate in an online survey on family interaction patterns, providing data on 944 unique dyadic family relationships. Associations between age, acculturation, interactivity (shared family activities, living proximity, and interaction frequency), closeness (family connectedness and interaction quality), and family health influence (reflecting influence on diet, exercise, sleep, stress, substance use, and relationship building) were evaluated through structural equation modeling. The final model displayed strong fit (CFI:0.956, RMSEA:0.081, SRMR:0.041), and revealed that an increase in closeness compared to interactivity corresponded with a greater increase in family health influence, with both completely mediating the association between age and family health influence. Acculturation was not associated with closeness, and its effect on family health influence was only partially mediated through interactivity. In subgroup analyses, neither interactivity nor closeness mediated the relationship between age and family health influence among South Asians (unlike East and Southeast Asians). Findings suggest the importance of targeting interactivity and closeness separately when developing AA family-based health interventions, and considering how the age and acculturation profile of AA young adults may shape these dynamics.