My overarching research goal is using rigorous causal inference thinking and methods to improve evidence on social determinants of health and health disparities. Rather than merely applying complex methods, my motto is to harness their full potential by identifying and applying the methods to the unique challenges in social epidemiologic studies where they truly shine.
I lead a multitude of projects spanning a broad spectrum of methodological issues, including but not limited to: analyzing time-varying treatments to derive different, policy-relevant insights, and identifying when conventional single-point exposure analysis may be misleading; the use of machine learning methods for robust effect estimation and assessing high-dimensional heterogeneous exposure effects, capturing the intersectionality; the consideration of causal estimands and selection bias in trauma studies with sample attrition; novel approaches to characterize and operationalize neighborhood characteristics; and a novel causal inference method to simulate the impacts of realistic hypothetical interventions on health disparities.
In addition to these methodological focuses, I have worked on several key substantive areas that address urgent public health concerns. First, I study the effects of stressful experiences and traumatic events (such as climate change, disasters, child adversity, pandemics, and global financial crises) on population health, with a particular focus on older adult populations. Second, I investigate the roles of social relationships, social engagement (e.g., volunteering), and related exposures such as loneliness and social isolation) in promoting the health of older adults and fostering resilience. I have also explored how internet-based social interactions can influence population health. Third, I study the impacts of positive psychological factors (for instance, purpose in life, Ikigai) on health. My research further delves into inequalities in and determinants of multidimensional well-being (i.e., human flourishing), which extends beyond traditional physical and mental health outcomes and include other key domains of human well-being such as purpose in life and social well-being. In essence, my objective for this line of research is to study health in its fullest sense, defined by the World Health Organization as “a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.”
Diversity, Equity, Inclusion and Accessibility
Dr. Shiba's research directly concerns addressing inequalities. As a social epidemiologist, Dr. Shiba studies social determinants of health (SDH). Although examining the population average impact of SDH as an upstream determinant of health is valuable on its own for disease prevention at the population level and promoting public health, his SDH research has also considered a) the distributions of the SDHs within and across populations and b) how the effects of the SDHs can be heterogeneous. Dr. Shiba also leveraged his expertise in measuring health disparity and applied it to the science of well-being, where the focus of research has been primarily on assessing population averages.
Dr. Shiba values diversity and inclusion in research as keys to general academic excellence because investigators’ identities (e.g., nationality, gender, race/ethnicity) and educational backgrounds (e.g., clinicians, social scientists, statistician) influence many aspects of research such as research questions and hypotheses, methodology, and interpretation of data.
Publications listed below are automatically derived from MEDLINE/PubMed and other
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Okuzono SS, Slopen N, Shiba K, Yazawa A, Kondo K, Kawachi I. Do adverse childhood experiences modify the association between disaster-related trauma and cognitive disability? Am J Epidemiol. 2023 Jul 11. PMID: 37442811
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Yazawa A, Shiba K, Okuzono SS, Hikichi H, Kawachi I. Bidirectional associations between post-traumatic stress symptoms and sleep quality among older survivors of the 2011 Great East Japan Earthquake and Tsunami. Sleep. 2023 Jun 13; 46(6). PMID: 37029901; PMCID: PMC10465083; DOI: 10.1093/sleep/zsad106;
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Nakagomi A, Tsuji T, Saito M, Ide K, Kondo K, Shiba K. Social isolation and subsequent health and well-being in older adults: A longitudinal outcome-wide analysis. Soc Sci Med. 2023 Jun; 327:115937. PMID: 37167920
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Okuzono SS, Wilkinson R, Shiba K, Yazawa A, VanderWeele T, Slopen N. Residential instability during adolescence and health and wellbeing in adulthood: A longitudinal outcome-wide study. Health Place. 2023 Mar; 80:102991. PMID: 36857896
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Shiba K, Daoud A, Hikichi H, Yazawa A, Aida J, Kondo K, Kawachi I. Uncovering Heterogeneous Associations Between Disaster-Related Trauma and Subsequent Functional Limitations: A Machine-Learning Approach. Am J Epidemiol. 2023 Feb 01; 192(2):217-229. PMID: 36255224; PMCID: PMC10308508; DOI: 10.1093/aje/kwac187;
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Hirose N, Chen S, Shiba K, Patil CL, Rahman MM, Shimpuku Y. Universal health coverage of five essential health services in mothers before and after the Haiti 2010 earthquake: a retrospective cohort study using difference-in-difference. BMC Health Serv Res. 2022 Dec 10; 22(1):1505. PMID: 36496431; PMCID: PMC9737961; DOI: 10.1186/s12913-022-08896-1;
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Inoue K, Haseda M, Shiba K, Tsuji T, Kondo K, Kondo N. Social Isolation and Depressive Symptoms Among Older Adults: A Multiple Bias Analysis Using a Longitudinal Study in Japan. Ann Epidemiol. 2023 Jan; 77:110-118. PMID: 36417983; DOI: 10.1016/j.annepidem.2022.11.001;
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Shiba K, Kubzansky LD, Williams DR, VanderWeele TJ, Kim ES. Purpose in life and 8-year mortality by gender and race/ethnicity among older adults in the U.S. Prev Med. 2022 Nov; 164:107310. PMID: 36283485; DOI: 10.1016/j.ypmed.2022.107310;
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Nagai M, Hikichi H, Shiba K, Kondo K, Kawachi I, Aida J. Long-Term Trend in the Association Between Disaster Damage and Happiness Before and After the Great East Japan Earthquake. Int J Public Health. 2022; 67:1604901. PMID: 36188751; PMCID: PMC9515324; DOI: 10.3389/ijph.2022.1604901;
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Shiba K, Hikichi H, Okuzono SS, VanderWeele TJ, Arcaya M, Daoud A, Cowden RG, Yazawa A, Zhu DT, Aida J, Kondo K, Kawachi I. Long-Term Associations between Disaster-Related Home Loss and Health and Well-Being of Older Survivors: Nine Years after the 2011 Great East Japan Earthquake and Tsunami. Environ Health Perspect. 2022 Jul; 130(7):77001. PMID: 35776697; PMCID: PMC9249145; DOI: 10.1289/EHP10903;
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Kawahara T, Shiba K, Tsuchiya A. Application of Causal Inference Methods in the Analysis of Observational Neurosurgical Data: G-Formula and Marginal Structural Model. World Neurosurg. 2022 May; 161:310-315. PMID: 35505549
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Guimond AJ, Shiba K, Kim ES, Kubzansky LD. Sense of purpose in life and inflammation in healthy older adults: A longitudinal study. Psychoneuroendocrinology. 2022 07; 141:105746. PMID: 35364478; PMCID: PMC9149071; DOI: 10.1016/j.psyneuen.2022.105746;
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Shiba K, Cowden RG, Counted V, VanderWeele TJ, Fancourt D. Associations of home confinement during COVID-19 lockdown with subsequent health and well-being among UK adults. Curr Psychol. 2022 Mar 15; 1-10. PMID: 35309290; PMCID: PMC8922081; DOI: 10.1007/s12144-022-03001-5;
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Okuzono SS, Shiba K, Lee HH, Shirai K, Koga HK, Kondo N, Fujiwara T, Kondo K, Grodstein F, Kubzansky LD, Trudel-Fitzgerald C. Optimism and Longevity Among Japanese Older Adults. J Happiness Stud. 2022 Aug; 23(6):2581-2595. PMID: 36919080; PMCID: PMC10010677; DOI: 10.1007/s10902-022-00511-8;
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Okuzono SS, Shiba K, Lee HH, Shirai K, Koga KH, Kondo N, Fujiwara T, Kondo K, Grodstein F, Kubzansky LD, Trudel-Fitzgerald C. Optimism and Longevity Among Japanese Older Adults. Journal of Happiness Studies. 2022; (23):2581-2595.
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Shiba K, Cowden RG, Gonzalez N, Ransome Y, Nakagomi A, Chen Y, Lee MT, VanderWeele TJ, Fancourt D. Associations of online religious participation during COVID-19 lockdown with subsequent health and well-being among UK adults. Psychol Med. 2023 Jul; 53(9):3887-3896. PMID: 35189993; PMCID: PMC10317791; DOI: 10.1017/S0033291722000551;
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Shiba K, Cowden RG, Gonzalez N, Lee MT, Lomas T, Lai AY, VanderWeele TJ. Global Trends of Mean and Inequality in Multidimensional Wellbeing: Analysis of 1.2 Million Individuals From 162 Countries, 2009-2019. Front Public Health. 2022; 10:824960. PMID: 35237554; PMCID: PMC8882600; DOI: 10.3389/fpubh.2022.824960;
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Okuzono SS, Shiba K, Kim ES, Shirai K, Kondo N, Fujiwara T, Kondo K, Lomas T, Trudel-Fitzgerald C, Kawachi I, VanderWeele TJ. Ikigai and subsequent health and wellbeing among Japanese older adults: Longitudinal outcome-wide analysis. Lancet Reg Health West Pac. 2022 Apr; 21:100391. PMID: 35141667; PMCID: PMC8814687; DOI: 10.1016/j.lanwpc.2022.100391;
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Yazawa A, Shiba K, Inoue Y, Okuzono SS, Inoue K, Kondo N, Kondo K, Kawachi I. Early childhood adversity and late-life depressive symptoms: unpacking mediation and interaction by adult socioeconomic status. Soc Psychiatry Psychiatr Epidemiol. 2022 Jun; 57(6):1147-1156. PMID: 35103808
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Shiba K, Daoud A, Kino S, Nishi D, Kondo K, Kawachi I. Uncovering heterogeneous associations of disaster-related traumatic experiences with subsequent mental health problems: A machine learning approach. Psychiatry Clin Neurosci. 2022 Apr; 76(4):97-105. PMID: 34936171; PMCID: PMC9102396; DOI: 10.1111/pcn.13322;
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Kamada M, Hayashi H, Shiba K, Taguri M, Kondo N, Lee IM, Kawachi I. Large-Scale Fandom-based Gamification Intervention to Increase Physical Activity: A Quasi-experimental Study. Med Sci Sports Exerc. 2022 01 01; 54(1):181-188. PMID: 34366420; PMCID: PMC8677610; DOI: 10.1249/MSS.0000000000002770;
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Lomas T, Lai A, Shiba K, Diego-Rosell P, Uchida Y, VanderWeele JT. World Happiness Report. Insights from the first global survey of balance and harmony. 2022; 127-154.
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Shiba K, Torres JM, Daoud A, Inoue K, Kanamori S, Tsuji T, Kamada M, Kondo K, Kawachi I. Estimating the Impact of Sustained Social Participation on Depressive Symptoms in Older Adults. Epidemiology. 2021 11 01; 32(6):886-895. PMID: 34172690
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Shiba K, Daoud A, Hikichi H, Yazawa A, Aida J, Kondo K, Kawachi I. Heterogeneity in cognitive disability after a major disaster: A natural experiment study. Sci Adv. 2021 Oct; 7(40):eabj2610. PMID: 34586850; PMCID: PMC8480922; DOI: 10.1126/sciadv.abj2610;
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Shiba K, Kawahara T, Aida J, Kondo K, Kondo N, James P, Arcaya M, Kawachi I. Causal Inference in Studying the Long-Term Health Effects of Disasters: Challenges and Potential Solutions. Am J Epidemiol. 2021 09 01; 190(9):1867-1881. PMID: 33728430; PMCID: PMC8579004; DOI: 10.1093/aje/kwab064;
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Nakagomi A, Shiba K, Ueno T, Kondo K, Kawachi I. General health checks and incident dementia: A six-year follow-up study of community-dwelling older adults in Japan. Prev Med. 2021 12; 153:106757. PMID: 34348136
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Kino S, Hsu YT, Shiba K, Chien YS, Mita C, Kawachi I, Daoud A. A scoping review on the use of machine learning in research on social determinants of health: Trends and research prospects. SSM Popul Health. 2021 Sep; 15:100836. PMID: 34169138; PMCID: PMC8207228; DOI: 10.1016/j.ssmph.2021.100836;
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Nakagomi A, Shiba K, Kondo K, Kawachi I. Can Online Communication Prevent Depression Among Older People? A Longitudinal Analysis. J Appl Gerontol. 2022 01; 41(1):167-175. PMID: 33356760
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Shiba K, Yazawa A, Kino S, Kondo K, Aida J, Kawachi I. Depressive symptoms in the aftermath of major disaster: Empirical test of the social support deterioration model using natural experiment. Wellbeing Space Soc. 2020; 1. PMID: 36238446; PMCID: PMC9555822; DOI: 10.1016/j.wss.2020.100006;
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Shiba K, Hanazato M, Aida J, Kondo K, Arcaya M, James P, Kawachi I. Cardiometabolic Profiles and Change in Neighborhood Food and Built Environment Among Older Adults: A Natural Experiment. Epidemiology. 2020 11; 31(6):758-767. PMID: 33003147; PMCID: PMC7534567; DOI: 10.1097/EDE.0000000000001243;
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Ogawa T, Yoshii T, Moriwaki M, Morishita S, Oh Y, Miyatake K, Nazarian A, Shiba K, Okawa A, Fushimi K, Fujiwara T. Association between Hemiarthroplasty vs Total Hip Arthroplasty and Major Surgical Complications among Patients with Femoral Neck Fracture. J Clin Med. 2020 Oct 03; 9(10). PMID: 33023020; PMCID: PMC7601407; DOI: 10.3390/jcm9103203;
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Shiba K, Aida J, Kondo K, Nakagomi A, Arcaya M, James P, Kawachi I. Mediation of the relationship between home loss and worsened cardiometabolic profiles of older disaster survivors by post-disaster relocation: A natural experiment from the Great East Japan earthquake and tsunami. Health Place. 2020 11; 66:102456. PMID: 33010662; PMCID: PMC7686264; DOI: 10.1016/j.healthplace.2020.102456;
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Nakagomi A, Shiba K, Kondo K, Kawachi I. Can social capital moderate the impact of widowhood on depressive symptoms? A fixed-effects longitudinal analysis. Aging Ment Health. 2021 10; 25(10):1811-1820. PMID: 32687396
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Nakagomi A, Shiba K, Hanazato M, Kondo K, Kawachi I. Does community-level social capital mitigate the impact of widowhood & living alone on depressive symptoms?: A prospective, multi-level study. Soc Sci Med. 2020 08; 259:113140. PMID: 32645611
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Shiba K, Hikichi H, Aida J, Kondo K, Kawachi I. Long-Term Associations Between Disaster Experiences and Cardiometabolic Risk: A Natural Experiment From the 2011 Great East Japan Earthquake and Tsunami. Am J Epidemiol. 2019 06 01; 188(6):1109-1119. PMID: 30874714; PMCID: PMC7301774; DOI: 10.1093/aje/kwz065;
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Shiba K, Kondo N. The Global Financial Crisis and Overweight among Children of Single Parents: A Nationwide 10-Year Birth Cohort Study in Japan. Int J Environ Res Public Health. 2019 03 20; 16(6). PMID: 30897687; PMCID: PMC6466597; DOI: 10.3390/ijerph16061001;
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Saito T, Kondo N, Shiba K, Murata C, Kondo K. Income-based inequalities in caregiving time and depressive symptoms among older family caregivers under the Japanese long-term care insurance system: A cross-sectional analysis. PLoS One. 2018; 13(3):e0194919. PMID: 29590211; PMCID: PMC5874058; DOI: 10.1371/journal.pone.0194919;
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Shiba K, Kondo N, Kondo K, Kawachi I. Retirement and mental health: dose social participation mitigate the association? A fixed-effects longitudinal analysis. BMC Public Health. 2017 05 30; 17(1):526. PMID: 28558670
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Shiba K, Kondo N, Kondo K. Informal and Formal Social Support and Caregiver Burden: The AGES Caregiver Survey. J Epidemiol. 2016 Dec 05; 26(12):622-628. PMID: 27180934
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Shiba K, Nishimoto M, Sugimoto M, Ishikawa Y. Correction: The Association between Meditation Practice and Job Performance: A Cross-Sectional Study. PLoS One. 2015; 10(12):e0145140. PMID: 26673436
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Shiba K, Nishimoto M, Sugimoto M, Ishikawa Y. The Association between Meditation Practice and Job Performance: A Cross-Sectional Study. PLoS One. 2015; 10(5):e0128287. PMID: 26024382
This graph shows the total number of publications by year, by first, middle/unknown,
or last author.
Year | Publications |
---|
2015 | 2 |
2016 | 1 |
2017 | 1 |
2018 | 1 |
2019 | 2 |
2020 | 8 |
2021 | 7 |
2022 | 17 |
2023 | 5 |
2019 Harvard T.H. Chan School of Public Health:
Teaching Assistant Award
2015 Japan Epidemiological Association:
Best Presentation
2015 University of Tokyo:
Graduate Study Scholarship