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Chen JI, Niederhausen M, Bui DP, Govier DJ, Rowneki M, Hickok A, Shahoumian TA, Shepherd-Banigan M, Korpak A, Hawkins E, Teo AR, Naylor J, Osborne TF, Smith VA, Bowling CB, Boyko EJ, Ioannou GN, Maciejewski ML, O'Hare AM, Viglianti EM, Iwashyna TJ, Bohnert ASB, Hynes DM. Veteran Mental Health Emergency Care Utilization Following SARS-CoV-2 Infection. Health Serv Res. 2025 Jun 5;:e14622. doi: 10.1111/1475-6773.14622. [Epub ahead of print] PubMed PMID: 40474431.
Teo AR, Benton MC, Hooker ER, Zaccari B, Hidalgo NJ, Newell S, Tuepker A, Greaves DW, Nicosia FM. Effect of telehealth yoga on loneliness and social isolation among rural older adults: a randomized controlled trial. Aging Ment Health. 2025 May;29(5):824-832. doi: 10.1080/13607863.2024.2449126. Epub 2025 Jan 10. PubMed PMID: 39791606; PubMed Central PMCID: PMC12048237.
Teo AR, Rice SPM, Meyer E, Karras-Pilato E, Strickland S, Dobscha SK. An approach to evaluation of digital data in public health campaigns. Digit Health. 2024 Jan-Dec;10:20552076241291682. doi: 10.1177/20552076241291682. eCollection 2024 Jan-Dec. PubMed PMID: 39553283; PubMed Central PMCID: PMC11565621.
Hajek A, Teo AR, Zwar L, König HH. Validation of the German version of the 25-item hikikomori questionnaire 25. Int J Methods Psychiatr Res. 2024 Jun;33(2):e2027. doi: 10.1002/mpr.2027. PubMed PMID: 38899465; PubMed Central PMCID: PMC11187541.
Hynes DM, Niederhausen M, Chen JI, Shahoumian TA, Rowneki M, Hickok A, Shepherd-Banigan M, Hawkins EJ, Naylor J, Teo A, Govier DJ, Berry K, McCready H, Osborne TF, Wong E, Hebert PL, Smith VA, Bowling CB, Boyko EJ, Ioannou GN, Iwashyna TJ, Maciejewski ML, O'Hare AM, Viglianti EM, Bohnert AS. Risk of Suicide-Related Outcomes After SARS-COV-2 Infection: Results from a Nationwide Observational Matched Cohort of US Veterans. J Gen Intern Med. 2024 Mar;39(4):626-635. doi: 10.1007/s11606-023-08440-9. Epub 2023 Oct 26. PubMed PMID: 37884839; PubMed Central PMCID: PMC10973286.
Correia Lopes F, Pinto da Costa M, Fernandez-Lazaro CI, Lara-Abelenda FJ, Pereira-Sanchez V, Teo AR, Alvarez-Mon MA. Analysis of the hikikomori phenomenon - an international infodemiology study of Twitter data in Portuguese. BMC Public Health. 2024 Feb 19;24(1):518. doi: 10.1186/s12889-023-17617-0. PubMed PMID: 38373925; PubMed Central PMCID: PMC10875796.
Teo AR, Hooker ER, Call AA, Dobscha SK, Gamble S, Cross WF, Rodgers C. Brief video training for suicide prevention in veterans: A randomized controlled trial of VA S.A.V.E. Suicide Life Threat Behav. 2024 Feb;54(1):154-166. doi: 10.1111/sltb.13028. Epub 2023 Dec 14. PubMed PMID: 38095049; PubMed Central PMCID: PMC11164032.
Nishimura M, Teo AR, Mochizuki T, Fujiwara N, Nakamura M, Yamashita D. Feasibility and perceptions of a benzodiazepine deprescribing quality improvement initiative for primary care providers in Japan. BMC Prim Care. 2024 Jan 24;25(1):35. doi: 10.1186/s12875-024-02270-2. PubMed PMID: 38267882; PubMed Central PMCID: PMC10807085.
Golden SE, Lafferty M, Tyzik A, Govier D, Barton J, Teo AR, Edwards ST, Ono SS, Hynes DM, Slatore CG. A Qualitative Study of VA Entrants’ Experiences Discussing Community Care With Veterans. Sage Journals. 2023 October; 13(4).
Teo AR, Horie K, Kurahara K, Kato TA. The Hikikomori Diagnostic Evaluation (HiDE): a proposal for a structured assessment of pathological social withdrawal. World Psychiatry. 2023 Oct;22(3):478-479. doi: 10.1002/wps.21123. PubMed PMID: 37713577; PubMed Central PMCID: PMC10503919.
Sayer NA, Nelson DB, Gradus JL, Sripada RK, Murdoch M, Teo AR, Orazem RJ, Cerel J. The Effects of Suicide Exposure on Mental Health Outcomes Among Post-9/11 Veterans: Protocol for an Explanatory, Sequential, Mixed Methods Study. JMIR Res Protoc. 2023 Sep 26;12:e51324. doi: 10.2196/51324. PubMed PMID: 37751271; PubMed Central PMCID: PMC10565621.
Alvarez-Mon MA, Pereira-Sanchez V, Hooker ER, Sanchez F, Alvarez-Mon M, Teo AR. Content and User Engagement of Health-Related Behavior Tweets Posted by Mass Media Outlets From Spain and the United States Early in the COVID-19 Pandemic: Observational Infodemiology Study. JMIR Infodemiology. 2023 Aug 22;3:e43685. doi: 10.2196/43685. PubMed PMID: 37347948; PubMed Central PMCID: PMC10445660.
Teo AR, Niederhausen M, Handley R, Metcalf EE, Call AA, Jacob RL, Zikmund-Fisher BJ, Dobscha SK, Kaboli PJ. Using Nudges to Reduce Missed Appointments in Primary Care and Mental Health: a Pragmatic Trial. J Gen Intern Med. 2023 Jul;38(Suppl 3):894-904. doi: 10.1007/s11606-023-08131-5. Epub 2023 Jun 20. PubMed PMID: 37340264; PubMed Central PMCID: PMC10356735.
Reger MA, Carter SP, Teo AR. Veteran Receptiveness to Clinician Discussions About Their Firearms. JAMA Netw Open. 2023 Jun 1;6(6):e2321224. doi: 10.1001/jamanetworkopen.2023.21224. PubMed PMID: 37382960.
Lyakina YS, Fedorov AA, Teo AR. Validation and application practice of the Russian-language version of the 25-item Hikikomori Questionnaire (HQ-25). Психология Журнал Высшей школы экономики. 2023 June; 20(2):257-281.
Teo AR, Call AA, Hooker ER, Fong C, Karras E, Dobscha SK. Feasibility of recruitment and retention in a remote trial of gatekeeper training for close supports of military veterans: Mixed methods study. Contemp Clin Trials Commun. 2022 Dec;30:100993. doi: 10.1016/j.conctc.2022.100993. eCollection 2022 Dec. PubMed PMID: 36159001; PubMed Central PMCID: PMC9489752.
Gürbüz PG, Yavaş Ö, Deveci ME, Teo AR. Psychometric Properties of the Hikikomori Questionnaire (HQ-25) in Türkiye. Eurasian Journal of Sport Sciences and Education.. 2022 December; 4(2):123-134.
Amendola S, Presaghi F, Teo AR, Cerutti R. Psychometric Properties of the Italian Version of the 25-Item Hikikomori Questionnaire. Int J Environ Res Public Health. 2022 Oct 19;19(20). doi: 10.3390/ijerph192013552. PubMed PMID: 36294128; PubMed Central PMCID: PMC9603413.
Lafferty M, Strange W, Kaboli P, Tuepker A, Teo AR. Patient Sense of Belonging in the Veterans Health Administration: A Qualitative Study of Appointment Attendance and Patient Engagement. Med Care. 2022 Sep 1;60(9):726-732. doi: 10.1097/MLR.0000000000001749. Epub 2022 Jul 26. PubMed PMID: 35880766; PubMed Central PMCID: PMC9378705.
Amendola S, Presaghi F, Teo AR, Cerutti R. Psychometric Properties of the Italian Version of the 25-Item Hikikomori Questionnaire for Adolescents. Int J Environ Res Public Health. 2022 Aug 21;19(16). doi: 10.3390/ijerph191610408. PubMed PMID: 36012042; PubMed Central PMCID: PMC9408307.
Zikmund-Fisher BJ, Tuepker A, Metcalf EE, Strange W, Teo AR. Applying user-centered design in the development of nudges for a pragmatic trial to reduce no-shows among veterans. Patient Educ Couns. 2022 Jun;105(6):1620-1627. doi: 10.1016/j.pec.2021.10.024. Epub 2021 Oct 23. PubMed PMID: 34756639; PubMed Central PMCID: PMC9033881.
Ishibashi S, Ide S, Suzuki F, Teo A, Nagata T, Kosaka H. Development of the Japanese version of the Coronavirus Anxiety Scale and Obsession with COVID-19 Scale. Psychiatry Clin Neurosci. 2022 Apr;76(4):124-125. doi: 10.1111/pcn.13333. Epub 2022 Feb 10. PubMed PMID: 35043511.
Kaveladze B, Diamond Altman A, Niederhausen M, Loftis JM, Teo AR. Social relationship quality, depression and inflammation: A cross-cultural longitudinal study in the United States and Tokyo, Japan. Int J Soc Psychiatry. 2022 Mar;68(2):253-263. doi: 10.1177/0020764020981604. Epub 2020 Dec 18. PubMed PMID: 33334208; PubMed Central PMCID: PMC8394847.
Pereira-Sanchez V, Alvarez-Mon MA, Horinouchi T, Kawagishi R, Tan MPJ, Hooker ER, Alvarez-Mon M, Teo AR. Examining Tweet Content and Engagement of Users With Tweets About Hikikomori in Japanese: Mixed Methods Study of Social Withdrawal. J Med Internet Res. 2022 Jan 11;24(1):e31175. doi: 10.2196/31175. PubMed PMID: 35014971; PubMed Central PMCID: PMC8925292.
Das A, Padala KP, Crawford CG, Teo A, Mendez DM, Phillips OA, Wright BC, House S, Padala PR. A systematic review of loneliness and social isolation scales used in epidemics and pandemics. Psychiatry Res. 2021 Dec;306:114217. doi: 10.1016/j.psychres.2021.114217. Epub 2021 Oct 8. PubMed PMID: 34644661; PubMed Central PMCID: PMC8502233.
Amendola S, Cerutti R, Presaghi F, Spensieri V, Lucidi C, Silvestri E, Di Giorgio V, Conti F, Martorelli A, Izzi G, Alan TR. Hikikomori, problematic internet use and psychopathology: correlates in non-clinical and clinical samples of young adults in Italy. Giornale Italiano di Psicopatologia. 2021 March; 27(2):106-114.
Teo AR, Metcalf EE, Strange W, Call AA, Tuepker A, Dobscha SK, Kaboli PJ. Enhancing Usability of Appointment Reminders: Qualitative Interviews of Patients Receiving Care in the Veterans Health Administration. J Gen Intern Med. 2021 Jan;36(1):121-128. doi: 10.1007/s11606-020-06183-5. Epub 2020 Sep 9. PubMed PMID: 32909229; PubMed Central PMCID: PMC7859164.
Tateno Y, Kumagai K, Monden R, Nanba K, Yano A, Shiraishi E, Teo AR, Tateno M. The Efficacy of Early Start Denver Model Intervention in Young Children with Autism Spectrum Disorder Within Japan: A Preliminary Study. Soa Chongsonyon Chongsin Uihak. 2021 Jan 1;32(1):35-40. doi: 10.5765/jkacap.200040. PubMed PMID: 33424240; PubMed Central PMCID: PMC7788666.
Teo AR, Strange W, Bui R, Dobscha SK, Ono SS. Responses to Concerning Posts on Social Media and Their Implications for Suicide Prevention Training for Military Veterans: Qualitative Study. J Med Internet Res. 2020 Oct 30;22(10):e22076. doi: 10.2196/22076. PubMed PMID: 33124990; PubMed Central PMCID: PMC7665941.
Teo AR, Nelson S, Strange W, Kubo H, Katsuki R, Kurahara K, Kanba S, Kato TA. Social withdrawal in major depressive disorder: a case-control study of hikikomori in japan. J Affect Disord. 2020 Sep 1;274:1142-1146. doi: 10.1016/j.jad.2020.06.011. Epub 2020 Jun 7. PubMed PMID: 32663943.
Teo AR, Marsh HE, Ono SS, Nicolaidis C, Saha S, Dobscha SK. The Importance of "Being There": a Qualitative Study of What Veterans with Depression Want in Social Support. J Gen Intern Med. 2020 Jul;35(7):1954-1962. doi: 10.1007/s11606-020-05692-7. Epub 2020 Feb 19. PubMed PMID: 32076990; PubMed Central PMCID: PMC7352022.
Raymaker DM, Teo AR, Steckler NA, Lentz B, Scharer M, Delos Santos A, Kapp SK, Hunter M, Joyce A, Nicolaidis C. "Having All of Your Internal Resources Exhausted Beyond Measure and Being Left with No Clean-Up Crew": Defining Autistic Burnout. Autism Adulthood. 2020 Jun 1;2(2):132-143. doi: 10.1089/aut.2019.0079. Epub 2020 Jun 10. PubMed PMID: 32851204; PubMed Central PMCID: PMC7313636.
Chen JI, Hooker ER, Niederhausen M, E Marsh H, Saha S, Dobscha SK, Teo AR. Social connectedness, depression symptoms, and health service utilization: a longitudinal study of Veterans Health Administration patients. Soc Psychiatry Psychiatr Epidemiol. 2020 May;55(5):589-597. doi: 10.1007/s00127-019-01785-9. Epub 2019 Nov 6. PubMed PMID: 31691842; PubMed Central PMCID: PMC7304483.
Malagón-Amor Á, Martín-López LM, Córcoles D, González A, Bellsolà M, Teo AR, Bulbena A, Pérez V, Bergé D. Family Features of Social Withdrawal Syndrome (Hikikomori). Front Psychiatry. 2020;11:138. doi: 10.3389/fpsyt.2020.00138. eCollection 2020. PubMed PMID: 32194459; PubMed Central PMCID: PMC7061609.
Teo AR, Metcalf EE, Strange W, Call AA, Tuepker A, Dobscha SK, Kaboli P. Recommendations to improve the usability of VA appointment reminders for Veterans. Portland, OR: Center to Improve Veteran Involvement in Care; 2020 March.
Kato TA, Kanba S, Teo AR. Defining pathological social withdrawal: proposed diagnostic criteria for hikikomori. World Psychiatry. 2020 Feb;19(1):116-117. doi: 10.1002/wps.20705. PubMed PMID: 31922682; PubMed Central PMCID: PMC6953582.
Teo AR, Ilgen M, Goodman M, Metcalf E. Veteran Engagement in Suicide Prevention Training. Health Services Research & Development/QUERI National Conference. 2019 October; Washington DC, United States.
Chen JI, Mastarone GL, Ambrosino SA, Anzalone N, Carlson KF, Dobscha SK, Teo AR. Evaluation of the Safety and Design of Community Internet Resources for Veteran Suicide Prevention. Crisis. 2019 Sep;40(5):347-354. doi: 10.1027/0227-5910/a000590. Epub 2019 Apr 2. PubMed PMID: 30935244; PubMed Central PMCID: PMC7295446.
Franz D, Marsh HE, Chen JI, Teo AR. Using Facebook for Qualitative Research: A Brief Primer. J Med Internet Res. 2019 Aug 13;21(8):e13544. doi: 10.2196/13544. PubMed PMID: 31411143; PubMed Central PMCID: PMC6711038.
Kato TA, Kanba S, Teo AR. Hikikomori : Multidimensional understanding, assessment, and future international perspectives. Psychiatry Clin Neurosci. 2019 Aug;73(8):427-440. doi: 10.1111/pcn.12895. Epub 2019 Jun 24. Review. PubMed PMID: 31148350.
Kato TA, Katsuki R, Kubo H, Shimokawa N, Sato-Kasai M, Hayakawa K, Kuwano N, Umene-Nakano W, Tateno M, Setoyama D, Kang D, Watabe M, Sakamoto S, Teo AR, Kanba S. Development and validation of the 22-item Tarumi's Modern-Type Depression Trait Scale: Avoidance of Social Roles, Complaint, and Low Self-Esteem (TACS-22). Psychiatry Clin Neurosci. 2019 Aug;73(8):448-457. doi: 10.1111/pcn.12842. Epub 2019 Apr 29. PubMed PMID: 30900331; PubMed Central PMCID: PMC6850625.
Tateno M, Teo AR, Ukai W, Kanazawa J, Katsuki R, Kubo H, Kato TA. Internet Addiction, Smartphone Addiction, and Hikikomori Trait in Japanese Young Adult: Social Isolation and Social Network. Front Psychiatry. 2019;10:455. doi: 10.3389/fpsyt.2019.00455. eCollection 2019. PubMed PMID: 31354537; PubMed Central PMCID: PMC6635695.
Pereira-Sanchez V, Alvarez-Mon MA, Asunsolo Del Barco A, Alvarez-Mon M, Teo A. Exploring the Extent of the Hikikomori Phenomenon on Twitter: Mixed Methods Study of Western Language Tweets. J Med Internet Res. 2019 May 29;21(5):e14167. doi: 10.2196/14167. PubMed PMID: 31144665; PubMed Central PMCID: PMC6658314.
Teo AR, Markwardt S, Hinton L. Using Skype to Beat the Blues: Longitudinal Data from a National Representative Sample. Am J Geriatr Psychiatry. 2019 Mar;27(3):254-262. doi: 10.1016/j.jagp.2018.10.014. Epub 2018 Oct 29. PubMed PMID: 30442532.
Tateno M, Kim DJ, Teo AR, Skokauskas N, Guerrero APS, Kato TA. Smartphone Addiction in Japanese College Students: Usefulness of the Japanese Version of the Smartphone Addiction Scale as a Screening Tool for a New Form of Internet Addiction. Psychiatry Investig. 2019 Feb;16(2):115-120. doi: 10.30773/pi.2018.12.25.2. Epub 2019 Feb 21. PubMed PMID: 30808117; PubMed Central PMCID: PMC6393743.
Teo AR, Chan BK, Saha S, Nicolaidis C. Frequency of social contact in-person vs. on Facebook: An examination of associations with psychiatric symptoms in military veterans. J Affect Disord. 2019 Jan 15;243:375-380. doi: 10.1016/j.jad.2018.09.043. Epub 2018 Sep 17. PubMed PMID: 30266029.
Malagón-Amor Á, Martín-López LM, Córcoles D, González A, Bellsolà M, Teo AR, Pérez V, Bulbena A, Bergé D. A 12-month study of the hikikomori syndrome of social withdrawal: Clinical characterization and different subtypes proposal. Psychiatry Res. 2018 Dec;270:1039-1046. doi: 10.1016/j.psychres.2018.03.060. Epub 2018 Mar 23. PubMed PMID: 29615267.
Teo AR. Using Social Media to Reach People with Active Psychiatric Symptoms: An Experiment with Facebook Ads. International Congress of the Pacific Rim College of Psychiatrists. 2018 October; Yangon, Myanmar.
Teo AR. Papers and Presentations: How to Get Published and Deliver Effective Talks. International Congress of the Pacific Rim College of Psychiatrists. 2018 October; Yangon, Myanmar.
Teo AR. Social Media messaging Campaigns and Their Role in Suicide Prevention among Military Populations in the United States. International Congress of the Pacific Rim College of Psychiatrists. 2018 October; Yangon, Myanmar.
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