{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T14:19:57Z","timestamp":1788531597866,"version":"build-2803163510"},"reference-count":37,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,8,8]],"date-time":"2026-08-08T00:00:00Z","timestamp":1786147200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0"},{"start":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T00:00:00Z","timestamp":1788480000000},"content-version":"vor","delay-in-days":27,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Emerg Med"],"DOI":"10.1186\/s12873-026-01723-4","type":"journal-article","created":{"date-parts":[[2026,8,8]],"date-time":"2026-08-08T16:43:11Z","timestamp":1786207391000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of a high-profile sudden cardiac death on emergency department utilization: a multi-campus interrupted time series and exploratory phenotyping study"],"prefix":"10.1186","volume":"26","author":[{"given":"Chenxi","family":"Wang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Han","family":"Cai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiujuan","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiayu","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guanhua","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,8,8]]},"reference":[{"key":"1723_CR1","doi-asserted-by":"publisher","unstructured":"Schenkel SK, Jungmann SM, Gropalis M, Witth\u00f6ft M. Conceptualizations of Cyberchondria and relations to the anxiety spectrum: systematic review and meta-analysis. J Med Internet Res. 2021;23(11):e27835. https:\/\/doi.org\/10.2196\/27835.","DOI":"10.2196\/27835"},{"key":"1723_CR2","doi-asserted-by":"publisher","first-page":"152167","DOI":"10.1016\/j.comppsych.2020.152167","volume":"99","author":"M Vismara","year":"2020","unstructured":"Vismara M, Caricasole V, Starcevic V, Cinosi E, Dell\u2019Osso B, Martinotti G, et al. Is cyberchondria a new transdiagnostic digital compulsive syndrome? A systematic review of the evidence. Compr Psychiatry. 2020;99:152167. https:\/\/doi.org\/10.1016\/j.comppsych.2020.152167.","journal-title":"Compr Psychiatry"},{"key":"1723_CR3","unstructured":"Wang V. The sudden death of a man who told Chinese kids how to succeed: shock and reflection in the era of involution [internet]. The New York Times Chinese. 2026, Mar, 26. Available from: https:\/\/cn.nytimes.com\/china\/20260326\/china-zhang-xuefeng-death\/."},{"key":"1723_CR4","unstructured":"Xinhuanet. Official obituary: education mentor Zhang Xuefeng passed away from sudden cardiac death at age 41 [Internet]. 2026 Mar 24. Available from: http:\/\/www.news.cn\/society\/2026-03\/24\/c_113009xxxx.htm. Beijing: Xinhuanet.com."},{"key":"1723_CR5","unstructured":"Daily J. Nationwide increase in emergency department visits for chest pain and palpitations. 2026 Apr 3. Available from: https:\/\/m.weibo.cn\/detail\/5283313444196809."},{"key":"1723_CR6","unstructured":"Jimu News. Surge in cardiology and emergency visits among young adults after sudden death of Zhang Xuefeng. 2026 Mar 27. Available from: https:\/\/m.toutiao.com\/group\/7621749686910599695\/."},{"key":"1723_CR7","unstructured":"Yangcheng Evening News. Cardiac screening surge in hospitals across China following Zhang Xuefeng\u2019s sudden cardiac death. 2026 Mar 27. Available from: https:\/\/m.toutiao.com\/group\/7621838849324401186\/."},{"key":"1723_CR8","doi-asserted-by":"publisher","unstructured":"Xu RH, Chen C. Moderating effect of coping strategies on the association between the Infodemic-driven overuse of health care services and cyberchondria and anxiety: partial least squares structural equation modeling study. J Med Internet Res. 2024;26:e53417. https:\/\/doi.org\/10.2196\/53417.","DOI":"10.2196\/53417"},{"issue":"11","key":"1723_CR9","doi-asserted-by":"publisher","first-page":"56","DOI":"10.1007\/s11920-020-01179-8","volume":"22","author":"V Starcevic","year":"2020","unstructured":"Starcevic V, Berle D, Arn\u00e1ez S. Recent insights into cyberchondria. Curr Psychiatry Rep. 2020;22(11):56. https:\/\/doi.org\/10.1007\/s11920-020-01179-8.","journal-title":"Curr Psychiatry Rep"},{"key":"1723_CR10","doi-asserted-by":"publisher","first-page":"305","DOI":"10.1016\/j.jad.2015.06.017","volume":"184","author":"TA Fergus","year":"2015","unstructured":"Fergus TA. Anxiety sensitivity and intolerance of uncertainty as potential risk factors for cyberchondria: a replication and extension examining dimensions of each construct. J Affective Disord. 2015;184:305\u201309. https:\/\/doi.org\/10.1016\/j.jad.2015.06.017.","journal-title":"J Affective Disord"},{"issue":"4","key":"1723_CR11","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1145\/1629096.1629101","volume":"27","author":"RW White","year":"2009","unstructured":"White RW, Cyberchondria HE. Cyberchondria. ACM Trans Inf Syst. 2009;27(4):1\u201337. https:\/\/doi.org\/10.1145\/1629096.1629101.","journal-title":"ACM Trans Inf Syst"},{"key":"1723_CR12","doi-asserted-by":"publisher","first-page":"102858","DOI":"10.1016\/j.eclinm.2024.102858","volume":"77","author":"AL Schaffer","year":"2024","unstructured":"Schaffer AL, Buckley NA, Schumann J, Lim JS, Cairns R, Raubenheimer J, et al. Patterns of medicine use in the year prior to death by suicide: an Australian population-based case series study. eClinicalmedicine. 2024;77:102858. https:\/\/doi.org\/10.1016\/j.eclinm.2024.102858.","journal-title":"eClinicalmedicine"},{"key":"1723_CR13","doi-asserted-by":"publisher","first-page":"102165","DOI":"10.1016\/j.eclinm.2023.102165","volume":"63","author":"KM Chitty","year":"2023","unstructured":"Chitty KM, Sperandei S, Carter GL, Ali Z, Raubenheimer JE, Schaffer AL, et al. Five healthcare trajectories in the year before suicide and what they tell us about opportunities for prevention: a population-level case series study. eClinicalmedicine. 2023;63:102165. https:\/\/doi.org\/10.1016\/j.eclinm.2023.102165.","journal-title":"eClinicalmedicine"},{"issue":"4","key":"1723_CR14","doi-asserted-by":"publisher","first-page":"390","DOI":"10.1016\/j.psym.2016.02.002","volume":"57","author":"ER Doherty-Torstrick","year":"2016","unstructured":"Doherty-Torstrick ER, Walton KE, Fallon BA. Cyberchondria: parsing health anxiety from online behavior. Psychosomatics. 2016;57(4):390\u2013400. https:\/\/doi.org\/10.1016\/j.psym.2016.02.002.","journal-title":"Psychosomatics"},{"issue":"1","key":"1723_CR15","doi-asserted-by":"publisher","first-page":"23683","DOI":"10.1038\/s41598-024-74829-z","volume":"14","author":"WC Hsu","year":"2024","unstructured":"Hsu WC. Developing a cyberchondria severity scale to promote self-care among university students during COVID-19. Sci Rep. 2024;14(1):23683. https:\/\/doi.org\/10.1038\/s41598-024-74829-z.","journal-title":"Sci Rep"},{"key":"1723_CR16","doi-asserted-by":"publisher","first-page":"110939","DOI":"10.1016\/j.resuscitation.2025.110939","volume":"219","author":"K Alm-Kruse","year":"2026","unstructured":"Alm-Kruse K, Scquizzato T, Di Mauro M, Fu J, Gazzato A, Vargas M, et al. Features and circumstances of out-of-hospital cardiac arrests caught on camera: an analysis of publicly available online videos. Resuscitation. 2026;219:110939. https:\/\/doi.org\/10.1016\/j.resuscitation.2025.110939.","journal-title":"Resuscitation"},{"key":"1723_CR17","doi-asserted-by":"publisher","first-page":"100877","DOI":"10.1016\/j.epidem.2025.100877","volume":"54","author":"MS Wohlfender","year":"2026","unstructured":"Wohlfender MS, Bouman JA, Endrich O, Ramette A, Leichtle AB, Beldi G, et al. Machine learning-based short-term forecasting of COVID-19 hospital admissions using routine hospital patient data. Epidemics. 2026;54:100877. https:\/\/doi.org\/10.1016\/j.epidem.2025.100877.","journal-title":"Epidemics"},{"key":"1723_CR18","doi-asserted-by":"publisher","unstructured":"Wang H, Sambamoorthi N, Hoot N, Bryant D, Sambamoorthi U. Evaluating fairness of machine learning prediction of prolonged wait times in emergency department with interpretable eXtreme gradient boosting. Al-jumeily obe D, ed. PLoS Digit Health. 2025;4(3):e0000751. https:\/\/doi.org\/10.1371\/journal.pdig.0000751.","DOI":"10.1371\/journal.pdig.0000751"},{"key":"1723_CR19","doi-asserted-by":"publisher","first-page":"594117","DOI":"10.3389\/fpubh.2020.594117","volume":"8","author":"LA Kapsner","year":"2021","unstructured":"Kapsner LA, Kampf MO, Seuchter SA, Gruendner J, Gulden C, Mate S, et al. Reduced rate of inpatient hospital admissions in 18 German university hospitals during the COVID-19 lockdown. Front Public Health. 2021;8:594117. https:\/\/doi.org\/10.3389\/fpubh.2020.594117.","journal-title":"Front Public Health"},{"key":"1723_CR20","doi-asserted-by":"publisher","first-page":"813518","DOI":"10.3389\/fpsyt.2021.813518","volume":"12","author":"NM Batelaan","year":"2022","unstructured":"Batelaan NM, Seldenrijk A, Van Den Heuvel OA, van Balkom AJLM, Kaiser A, Reneman L, et al. Anxiety, mental stress, and sudden cardiac arrest: epidemiology, possible mechanisms and future research. Front Psychiatry. 2022;12:813518. https:\/\/doi.org\/10.3389\/fpsyt.2021.813518.","journal-title":"Front Psychiatry"},{"issue":"2","key":"1723_CR21","doi-asserted-by":"publisher","first-page":"148","DOI":"10.1016\/j.annemergmed.2021.09.424","volume":"79","author":"AKC Wai","year":"2022","unstructured":"Wai AKC, Wong CKH, Wong JYH, Xiong X, Chu OCK, Wong MS, et al. Changes in emergency department visits, diagnostic groups, and 28-day mortality associated with the COVID-19 pandemic: a territory-wide, retrospective, cohort study. Ann Emerg Med. 2022;79(2):148\u201357. https:\/\/doi.org\/10.1016\/j.annemergmed.2021.09.424.","journal-title":"Ann Emerg Med"},{"key":"1723_CR22","doi-asserted-by":"publisher","first-page":"1150511","DOI":"10.3389\/fpubh.2023.1150511","volume":"11","author":"G Furia","year":"2023","unstructured":"Furia G, Vinci A, Colamesta V, Papini P, Grossi A, Cammalleri V, et al. Appropriateness of frequent use of emergency departments: a retrospective analysis in Rome, Italy. Front Public Health. 2023;11:1150511. https:\/\/doi.org\/10.3389\/fpubh.2023.1150511.","journal-title":"Front Public Health"},{"issue":"12","key":"1723_CR23","doi-asserted-by":"publisher","first-page":"2665","DOI":"10.1097\/CORR.0000000000000888","volume":"477","author":"J Blackburn","year":"2019","unstructured":"Blackburn J, Fischerauer SF, Talaei-Khoei M, Chen NC, Oh LS, Vranceanu AM. What are the implications of excessive internet searches for medical information by orthopaedic patients? Clin Orthop Relat Res. 2019;477(12):2665\u201373. https:\/\/doi.org\/10.1097\/CORR.0000000000000888.","journal-title":"Clin Orthop Relat Res"},{"key":"1723_CR24","doi-asserted-by":"publisher","first-page":"618508","DOI":"10.3389\/fpsyt.2021.618508","volume":"12","author":"R Varma","year":"2021","unstructured":"Varma R, Das S, Singh T. Cyberchondria amidst COVID-19 pandemic: challenges and management strategies. Front Psychiatry. 2021;12:618508. https:\/\/doi.org\/10.3389\/fpsyt.2021.618508.","journal-title":"Front Psychiatry"},{"issue":"2","key":"1723_CR25","doi-asserted-by":"publisher","first-page":"205","DOI":"10.1586\/ern.12.162","volume":"13","author":"V Starcevic","year":"2013","unstructured":"Starcevic V, Berle D. Cyberchondria: towards a better understanding of excessive health-related internet use. Expert Rev Neurotherapeutics. 2013;13(2):205\u201313. https:\/\/doi.org\/10.1586\/ern.12.162.","journal-title":"Expert Rev Neurotherapeutics"},{"issue":"6","key":"1723_CR26","doi-asserted-by":"publisher","first-page":"735","DOI":"10.1093\/heapol\/czaa038","volume":"35","author":"E Whyle","year":"2020","unstructured":"Whyle E, Olivier J. Social values and health systems in health policy and systems research: a mixed-method systematic review and evidence map. Health Policy Plan. 2020;35(6):735\u201351. https:\/\/doi.org\/10.1093\/heapol\/czaa038.","journal-title":"Health Policy Plan"},{"key":"1723_CR27","doi-asserted-by":"publisher","unstructured":"Sripa P, Hayhoe B, Garg P, Majeed A, Greenfield G. Impact of GP gatekeeping on quality of care, and health outcomes, use, and expenditure: a systematic review. Br J Gen Pract. 2019;69(682):e294\u2013303. https:\/\/doi.org\/10.3399\/bjgp19X702209.","DOI":"10.3399\/bjgp19X702209"},{"issue":"19","key":"1723_CR28","doi-asserted-by":"publisher","first-page":"12979","DOI":"10.3390\/ijerph191912979","volume":"19","author":"S Yang","year":"2022","unstructured":"Yang S, Zhou M, Liao J, Ding X, Hu N, Kuang L. Association between primary care utilization and emergency room or hospital inpatient services utilization among the Middle-aged and elderly in a self-referral system: evidence from the China health and retirement longitudinal study 2011\u20132018. IJERPH. 2022;19(19):12979. https:\/\/doi.org\/10.3390\/ijerph191912979.","journal-title":"IJERPH"},{"key":"1723_CR29","doi-asserted-by":"publisher","unstructured":"Zhang Q, Chun MM, He Y, Lun CZ, Chi LZ. Burnout in emergency medicine physicians: a meta-analysis and systematic review. Med (Baltim). 2020;99(32):e21462. https:\/\/doi.org\/10.1097\/MD.0000000000021462.","DOI":"10.1097\/MD.0000000000021462"},{"key":"1723_CR30","doi-asserted-by":"publisher","first-page":"766111","DOI":"10.3389\/fpsyt.2021.766111","volume":"12","author":"S Yan","year":"2021","unstructured":"Yan S, Shen X, Wang R, Luo Z, Han X, Gan Y, et al. Challenges faced by emergency physicians in China: an observation from the perspective of burnout. Front Psychiatry. 2021;12:766111. https:\/\/doi.org\/10.3389\/fpsyt.2021.766111.","journal-title":"Front Psychiatry"},{"issue":"5","key":"1723_CR31","doi-asserted-by":"publisher","first-page":"603","DOI":"10.1016\/j.jen.2022.06.002","volume":"48","author":"C Hammer","year":"2022","unstructured":"Hammer C, DePrez B, White J, Lewis L, Straughen S, Buchheit R. Enhancing hospital-wide patient flow to reduce emergency department crowding and boarding. J Emerg Nurs. 2022;48(5):603\u201309. https:\/\/doi.org\/10.1016\/j.jen.2022.06.002.","journal-title":"J Emerg Nurs"},{"issue":"11","key":"1723_CR32","doi-asserted-by":"publisher","first-page":"1131","DOI":"10.1001\/jama.2018.12777","volume":"320","author":"LS Rotenstein","year":"2018","unstructured":"Rotenstein LS, Torre M, Ramos MA, Rosales RC, Guille C, Sen S, et al. Prevalence of burnout among physicians: a systematic review. JAMA. 2018;320(11):1131. https:\/\/doi.org\/10.1001\/jama.2018.12777.","journal-title":"JAMA"},{"issue":"4","key":"1723_CR33","doi-asserted-by":"publisher","first-page":"227","DOI":"10.1097\/MEJ.0000000000000194","volume":"22","author":"I Bragard","year":"2015","unstructured":"Bragard I, Dupuis G, Fleet R. Quality of work life, burnout, and stress in emergency department physicians: a qualitative review. Eur J Emerg Med. 2015;22(4):227\u201334. https:\/\/doi.org\/10.1097\/MEJ.0000000000000194.","journal-title":"Eur J Emerg Med"},{"key":"1723_CR34","doi-asserted-by":"publisher","first-page":"196","DOI":"10.1016\/j.ajem.2021.06.025","volume":"55","author":"M Vu","year":"2022","unstructured":"Vu M, Erdelyi S, Mangat B, Chan H, Brubacher JR, Staples JA. Emergency department visits on lunar New Year\u2019s Eve in Vancouver, Canada. Am J Emerg Med. 2022;55:196\u201398. https:\/\/doi.org\/10.1016\/j.ajem.2021.06.025.","journal-title":"Am J Emerg Med"},{"key":"1723_CR35","doi-asserted-by":"publisher","first-page":"761060","DOI":"10.3389\/fmed.2022.761060","volume":"9","author":"G He","year":"2022","unstructured":"He G, Cai M, Meng R, Hu J, Peng K, Hou Z, et al. The Spring festival is associated with increased mortality risk in China: a study based on 285 Chinese locations. Front Med. 2022;9:761060. https:\/\/doi.org\/10.3389\/fmed.2022.761060.","journal-title":"Front Med"},{"key":"1723_CR36","doi-asserted-by":"publisher","unstructured":"Huang KA, Hardin WM, Prakash NS. Forecasting emergency room patient volumes using extreme gradient boosting with temporal and seasonal feature engineering: a comparative study across hospitals. Cureus. June 18, 2025.https:\/\/doi.org\/10.7759\/cureus.86276.","DOI":"10.7759\/cureus.86276"},{"key":"1723_CR37","unstructured":"Hospital Authority Hong Kong. Initial effectiveness of public healthcare charging reform [internet]. 2026 Feb 16 [cited 2026 Apr 20]. Available from: https:\/\/www.news.gov.hk\/chi\/2026\/02\/20260216\/20260216_102032_332.html. Hong Kong: Information Services Department."}],"container-title":["BMC Emergency Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/article\/10.1186\/s12873-026-01723-4","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12873-026-01723-4.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12873-026-01723-4.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T13:37:12Z","timestamp":1788529032000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1186\/s12873-026-01723-4"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,8]]},"references-count":37,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2026,12]]}},"alternative-id":["1723"],"URL":"https:\/\/doi.org\/10.1186\/s12873-026-01723-4","relation":{"has-preprint":[{"id-type":"doi","id":"10.21203\/rs.3.rs-9492927\/v1","asserted-by":"object"}]},"ISSN":["1471-227X"],"issn-type":[{"value":"1471-227X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,8]]},"assertion":[{"value":"22 April 2026","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"4 August 2026","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"8 August 2026","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"Ethical approval was waived by the Institutional Review Board of Tianjin Chest Hospital due to the retrospective, anonymized, and non-interventional design of this study. The requirement for informed consent was also waived by the Institutional Review Board of Tianjin Chest Hospital due to the retrospective nature of the study. All data were de-identified and analysed in aggregate. This study was performed in accordance with the Declaration of Helsinki.","order":1,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":2,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"238"}}