Xiaopeng Ji


Associate Professor

Office Location:
334 Tower at STAR

My program of research focuses on sleep and circadian health in community-based populations. I integrate social determinants of health, sleep/activity monitoring, biological makers and artificial intelligence agents (i.e., chatbot) into symptom science, such as neurobehavioral function, cardiometabolic risk factors and pain, in community-based populations (i.e., adolescents and young adults). I teach in undergraduate and graduate programs in the area of population health, global health, and evidence-based practice.


  • PhD, University of Pennsylvania School of Nursing, Philadelphia, PA  
  • MA in Statistics, University of Pennsylvania Wharton School, Philadelphia, PA  
  • MSN, Second Military Medical University School of Nursing, Shanghai, China
  • BSN, Southeast University School of Nursing, Nanjing, China                 


  • NURS 120: Population Health
  • NURS 235: Heath, Vulnerability, and Diversity
  • NURS 262: Healthcare Research and Evidence-Based Practice
  • NURS 418: Public and Global Health


  • NURS 883: Evidence Based Practice I: Methods
  • Covington, L., Ji, X., Patterson, F., Brownlow., J. (2023). Exploration of Sex and Age as Moderators Between Social Cumulative Risk and Sleep in a  Sample of Children and Adolescents Living in the United States. International Journal of Behavioral Medicine. 
  • Ji, X.,  An, Y. (co-first author), Zhou, L., Liu, J. Sleep and subjective wellbeing among adolescents: the mediating role of resilience (2023). Asian Journal of Social Health and Behavior. In press.
  • Ji, X., Covington, L., Ji, M., Patterson, F., Brownlow, J. (2022). Associations between sleep and overweight/obesity in adolescents vary by race/ethnicity and socioeconomic status.  Journal of Advanced Nursing. Advance online publication.  
  • Liu, J., Ji, X., Rovit, E., Lipman,T. (2022). Childhood sleep: assessments, risk factors, and potential mechanisms: a comprehensive review. World Journal of Pediatric. Advance online publication.
  • Liu, J., Ji, X., Rovit, E., Lipman,T. (2022). Childhood Sleep: Physical, Cognitive, and Behavioral Consequences and Interventions. World Journal of Pediatric. Advance online publication.
  • Wang, Y., Li, X., Ji, X.& Zhou, J. (2022). Adaptive Auricular Point Acupressure for Sleep Disturbance in Women with Breast Cancer: A Randomized Controlled Trial. Evidence-Based Complementary and Alternative Medicine. Advance online publication.  
  • Halabicky, O., Ji, X.,  Liu, J. (2022). Childhood lead exposure and sex-based neurobehavioral functioning in adolescence. NeuroToxicology, 93, 1-8. 
  • Ji, X., Saylor, J., & Earle, F. S. (2021). Sufficient sleep attenuates COVID-19 pandemic-related executive dysfunction in late adolescents and young adults. Sleep medicine, 85, 21-24. 
  • Ji, X., Compher, C. W., Irving, S. Y., Kim, J., Dinges, D. F., & Liu, J. (2021). Serum Micronutrient Status, Sleep Quality and Neurobehavioral function among Early Adolescents. Public Health Nutrition, 1-27. 
  • Ji, X., Wang, Y., & Saylor, J. (2021). Sleep and type 1 diabetes mellitus management among children, adolescents, and emerging young adults: A systematic review. Journal of Pediatric Nursing, 61, 245-253.
  • Bowen, M., Ji, X., & Griffioen, M. A. (In press). Poor sleep predicts increased pain perception among adults with mild cognitive impairment. Nursing Research.
  • Liu, J., Ji, X., Wang, G., Li, Y., Leung, P. W., & Pinto-Martin, J. (2020). Maternal emotions during the pre/postnatal periods and children's sleep behaviors: the mediating role of children's behavior. Journal of Affective Disorders.
  • Cui, N., Ji, X., Li, J., Cui, N., & Wang, G. (2020). Associated factors of habitual midday napping among Chinese adolescents. Sleep and Biological Rhythms, 1-11.
  • Yang, Y., Liu, W., Ji, X., Ma, C., Wang, X., Li, K., & Li, J. (2020). Extended afternoon naps are associated with hypertension in women but not in men. Heart & Lung, 49(1), 2-9.
  • Chee, W., Lee, Y., Ji, X., Chee, E., & Im, E. O. (2020). The Preliminary Efficacy of a Technology-Based Cancer Pain Management Program Among Asian American Breast Cancer Survivors. CIN: Computers, Informatics, Nursing, 38(3), 139-147.
  • Ji, X., Cui, N., & Liu, J. (2019). Using propensity score matching with doses in observational studies: An example from a child physical abuse and sleep quality study. Research in Nursing & Health, 42(6), 436-445.
  • Ji, X., Saylor, J., & Liu, J. (2019). The interactive effect of habitual midday napping and nighttime sleep duration on impaired fasting glucose risk in healthy adolescents. Sleep Medicine, 64, 77-84.
  • Liu, J., Feng, R., Ji, X., Cui, N., Raine, A., & Mednick, S. C. (2019). Midday napping in children: Associations between nap frequency and duration across cognitive, positive psychological well-being, behavioral, and metabolic health outcomes. Sleep. In press.
  • Saylor, J., Ji, X., Calamaro, C., Davey, A. (2019). Does Sleep Duration, Napping, and Social Jetlag Predict Hemoglobin A1c among College Students with Type 1 Diabetes Mellitus? Diabetes Research and Clinical Practice.
  • Ji, X., Li, J., & Liu, J. (2019). The relationship between midday napping and neurocognitive function in early adolescents. Behavioral Sleep Medicine, 17(5), 537-551.
  • Sun, Q., Ji, X., Zhou, W., & Liu, J. (2019). Sleep problems in shift nurses: A brief review and recommendations at both individual and institutional levels. Journal of Nursing Management, 27(1), 10-18.
  • Ji, X., Li, J, Liu, J. (2018). The Relationship between Midday Napping and Neurocognitive Function in Early Adolescents. Behavioral Sleep Medicine,16 (2). [Epub ahead of print]      
  • Sun, Q., Ji, X., Liu, J. (2018). Sleep problems in shift nurses: a brief review and recommendations at both individual and institutional levels. Journal of Nursing Management. [Epub ahead of print]      
  • Cui, N., Ji, X., &Liu, J. (2017). Child physical abuse, non-anemic iron deficiency and behavior problems among Chinese children. Journal of Pediatric Nursing. [Epub ahead of print]
  • Liu, J., Wang, G., Ji, X. et al. (2017). Agreement between parent-reports and child self-reports of sleep problems in Chinese children. Sleep and Biological Rhythms, 16(3):283-291.
  • Ji, X., Cui, N., & Liu, J. (2017). Neurocognitive Function Is Associated With Serum Iron Status in Early Adolescents. Biological Research For Nursing19(3), 269-277.
  • Ji, X., Grandner, M. A., & Liu, J. (2017). The relationship between micronutrient status and sleep patterns: a systematic review. Public health nutrition20(4), 687-701.
  • Im, E. O., Kim, S., Ji, X., Park, S., Chee, E., Chee, W., & Tsai, H. M. (2017). Improving menopausal symptoms through promoting physical activity: a pilot Web-based intervention study among Asian Americans. Menopause24(6), 653-662.
  • Ji, X., & Liu, J. (2016). Subjective sleep measures for adolescents: a systematic review. Child: care, health and development, 42 (6), 825–839.
  • Liu, J., Liu, X., Ji, X., Wang, Y., Zhou, G., & Chen, X. (2016). Sleep disordered breathing symptoms and daytime sleepiness are associated with emotional problems and poor school performance in children. Psychiatry research242, 218-225.
  • Chee, W., Kim, S., Ji, X., Park, S., Chee, E., Tsai, H. M., & Im, E. O. (2016). The effect of a culturally tailored web-based physical activity promotion program on Asian American midlife women’s depressive symptoms. Asian/Pacific Island Nursing Journal1(4), 162-173.
  • Im, E. O., Ji, X., Zhang, J., Kim, S., Lee, Y., Chee, E., … & Schapira, M. (2016). Issues in Developing and Evaluating a Culturally Tailored Internet Cancer Support Group. CIN: Computers, Informatics, Nursing34(10), 462-469.
  • Im, E. O., Lee, Y., Ji, X., Zhang, J., Kim, S., Chee, E., … & Shapira, M. M. (2016). Internet Recruitment of Asian American Breast Cancer Survivors. Advances in Nursing Science39(3), E17-E27.
  • Ji, X., & Liu, J. (2015). Associations between blood zinc concentrations and sleep quality in childhood: A Cohort Study. Nutrients7(7), 5684-5696.
  • Zhou, G., Ji, X., Cui, N., Cao, S., Liu, C., & Liu, J. (2015). Association between serum copper status and working memory in schoolchildren. Nutrients7(9), 7185-7196.
  • NIH Center of Biomedical Research Excellence (COBRE) in Cardiovascular Health Pilot Grant (P20GM113125). Sleep chatbot intervention for emerging adults with cardiometabolic risk factors. 7/2022-6/2024. Role: Principal Investigator.
  • American Nurses Foundation. Cardiovascular risk assessment among late Adolescents: sleep variability, napping and inflammatory biomarkers. 09/2018-10/2019. Role: Principal Investigator.
  • NIH. Perceptual learning and memory consolidation in adults with and without language impairment (PI: Sayako Earle). 07/2018-06/2021. Role: Co-investigator
  • General University Research Program. University of Delaware. The relationship among sleep, executive function and diabetes management in late adolescents with Type 1 Diabetes. 06/2018-06/2020. Role: Principal Investigator.
  • Office of Nursing Research Award University of Pennsylvania. Midday Napping, Nighttime Sleep and Neurocognitive Function in Adolescents, 2016-2017. Role: Principal Investigator.
  • Office of Nursing Research Award University of Pennsylvania. The relationship between serum micronutrients, sleep quality and daytime functioning in adolescents, 2015-2016. Role: Principal Investigator.
  • Club Hypnos Cup. Sleep Research Society Data Blitz Presentation. 2023  
  • Delaware Top Nurses: Academic Educator. 2022  
  • Nomination for Excellence in Teaching Award. University of Delaware. 2020      
  • The Dorothy Mereness Award. University of Pennsylvania School of Nursing. 2017