Timothy Geier, PhD

Publications

• Implementation of multi-tier approach to psychological intervention after traumatic injury (MAP-IT) model.

  (Timmer-Murillo S, Geier TJ, Puspitasari AJ, Murphy P, de Moya M, Brasel K, deRoon-Cassini TA.) Gen Hosp Psychiatry. 2026 Mar 17;100:102-108 PMID: 41865663 SCOPUS ID: 2-s2.0-105033256092 03/23/2026

• Hospital Admission Status and Healthcare Services Among Adults with Firearm Injury: A Retrospective Cohort Study.

  (Geier TJ, Timmer-Murillo S, Flynn-O'Brien KT, deRoon-Cassini TA.) Am J Prev Med. 2026 Feb 06:108300 PMID: 41655652 02/09/2026

• Relationships among peri-traumatic circulating endocannabinoids and long-term, negative outcomes following traumatic injury.

  (Albertina EA, Tomas CW, Geier TJ, Timmer-Murillo SC, Pina IG, Jazinski-Chambers K, Sauber G, Fitzgerald JM, Larson CL, deRoon-Cassini TA, Hillard CJ.) Psychopharmacology (Berl). 2026 Feb;243(2):383-399 PMID: 40643612 PMCID: PMC12904968 SCOPUS ID: 2-s2.0-105010584798 07/11/2025

• The diagnostic utility of the PCL-5 in a traumatically injured black population.

  (Geier TJ, Vine K, Torres L, Larson CL, deRoon-Cassini TA.) J Anxiety Disord. 2025 Apr;111:102988 PMID: 39985923 PMCID: PMC11985301 SCOPUS ID: 2-s2.0-85218462310 02/23/2025

• Pandemic-Related Stress Increases PTSD and Depression Risk in Traumatic Injury Patients: A Comparative Study of Pre- and Peri-Pandemic Trauma Cases.

  (Zapata JP, Tomas CW, Timmer-Murillo S, deRoon Cassini TA, Larson C, Torres L, Brandolino A, Geier T, Khan H, Schramm AT.) Stress Health. 2025 Apr;41(2):e3513 PMID: 39624980 PMCID: PMC11987568 SCOPUS ID: 2-s2.0-85211163033 12/03/2024

• Differences in intestinal bacteria in traumatic injury survivors with and without probable posttraumatic stress disorder.

  (Geier TJ, Atkinson SN, Pan AY, Mantz-Wichman M, Jazinski-Chambers K, Hillard CJ, deRoon-Cassini TA.) J Affect Disord. 2024 Sep 15;361:528-535 PMID: 38914163 SCOPUS ID: 2-s2.0-85196827087 06/25/2024

• Racial discrimination increases the risk for nonremitting posttraumatic stress disorder symptoms in traumatically injured Black individuals living in the United States.

  (Torres L, Geier TJ, Tomas CW, Bird CM, Timmer-Murillo S, Larson CL, deRoon-Cassini TA.) J Trauma Stress. 2024 Aug;37(4):697-709 PMID: 38650107 PMCID: PMC12937534 SCOPUS ID: 2-s2.0-85191185232 04/23/2024

• History of Racial Discrimination by Police Contributes to Worse Physical and Emotional Quality of Life in Black Americans After Traumatic Injury.

  (Geier TJ, Timmer-Murillo SC, Brandolino AM, Piña I, Harb F, deRoon-Cassini TA.) J Racial Ethn Health Disparities. 2024 Jun;11(3):1774-1782 PMID: 37249827 PMCID: PMC10228454 SCOPUS ID: 2-s2.0-85160614189 05/30/2023

• Mental Health Disparities Following Violent Injury: A Prospective Comparison of Survivors of Violent and Nonviolent Mechanisms of Injury.

  (Timmer-Murillo SC, Tomas CW, Geier TJ, Melin S, Brandolino A, Schramm AT, Larson CL, deRoon-Cassini TA.) Panam J Trauma Crit Care Emerg Surg. 2024;13(1):36-41 PMID: 41675656 PMCID: PMC12890216 01/01/2024

• Mental Health and Health-Related Quality of Life After Firearm Injury: A Preliminary Descriptive Study.

  (Timmer-Murillo SC, Melin SJH, Tomas CW, Geier TJ, Brandolino A, Schramm AT, Larson CL, deRoon-Cassini TA.) Ann Intern Med. 2023 Jul;176(7):1010-1012 PMID: 37216663 PMCID: PMC12951410 SCOPUS ID: 2-s2.0-85165222285 05/22/2023

• Psychiatric comorbidity in emergency general surgery patients: a prospective observational study.

  (Geier TJ, Simske N, Melin S, Trevino C, Murphy P, Schroeder ME, Brandolino A, deRoon-Cassini T, Schramm AT.) Trauma Surg Acute Care Open. 2023;8(1):e001117 PMID: 37622160 PMCID: PMC10445363 SCOPUS ID: 2-s2.0-85169922072 08/25/2023

• Facets of emotion dysregulation differentially predict depression and PTSD symptom severity following traumatic injury.

  (Timmer-Murillo S, Schramm AT, Geier TJ, Mcleod E, Larson CL, deRoon-Cassini TA.) Eur J Psychotraumatol. 2023;14(2):2193524 PMID: 36988588 PMCID: PMC10062211 SCOPUS ID: 2-s2.0-85151312767 03/30/2023