David O'riordan, PhD

Associate Professor

Palliative Medicine

Dr David O’Riordan is an Associate Professor in the Division of Palliative Medicine. He is a public health scholar with a Ph.D. from the University of Queensland, Australia focusing on instrument development and the application of social ecological models to promote positive health behavioral change. His extensive expertise in multi-method study design and data analytics has led to substantial contributions across three distinct research areas:
1. Patient-level clinical research
2. Institutional and programmatic research
3. Program evaluation

Dr O’Riordan collaborates closely with clinical teams to address a broad spectrum of patient outcomes, ranging from disease-specific issues like neurological disorders, ALS, heart failure, renal disease, and liver disease, to symptom-focused challenges such as pain, anxiety, dyspnea, and depression. His institutional and programmatic research has yielded invaluable insights into the structure and characteristics of inpatient, outpatient, and pediatric palliative care services. This research not only establishes normative data for performance benchmarks but also guides the nationwide expansion and sustainability of palliative care services.

In his work, Dr. O'Riordan employs the RE-AIM (Reach Effectiveness – Acceptance Implementation Maintenance) evaluation and planning framework. This approach assesses the effectiveness of quality improvement and education interventions, driving enhancements in patient care and support. He is committed to ensuring that all patients have equitable access to tailored palliative care that aligns with their individual values and goals. He has collaborated on projects aimed at investigating disparities in palliative care across diverse populations and developing a reliable screening tool to ensure that all patients with palliative care needs have access to the care they deserve.

Education
PhD, 2001 - Public Health, University of Queensland
MHSc, 1995 - Public Health, Queensland University of Technology
BEd, 1993 - Education, Queensland University of Technology
Publications

  1. Postier AC, Root MC, O'Riordan DL, Purser L, Friedrichsdorf SJ, Pantilat SZ, Bogetz JF. The Pediatric Palliative Care Quality Network: Palliative Care Consultation and Patient Outcomes. Hospital pediatrics 2023. PMID: 38044667


  2. Bischoff KE, Vanegas G, O'Riordan DL, Sumser B, Long J, Lin J, Berkey AR, Kobayashi E, Zapata C, Rabow MW, Pantilat SZ. A Systematic Approach to Assessing and Addressing Palliative Care Needs in an Outpatient Population. Journal of pain and symptom management 2023. PMID: 37380147


  3. Goss A, O'Riordan DL, Pantilat SZ. Inpatients With Dementia Referred for Palliative Care Consultation: A Multicenter Analysis. Neurology. Clinical practice 2022. PMID: 36382122


  4. Chapman AC, Lin JA, Cobert J, Marks A, Lin J, O'Riordan DL, Pantilat SZ. Utilization and Delivery of Specialty Palliative Care in the ICU: Insights from the Palliative Care Quality Network. TO REMOVE 2022. PMID: 35595374


  5. Bischoff KE, Lin J, Cohen E, O'Riordan DL, Meister S, Zapata C, Sicotte J, Lindenfeld P, Calton B, Pantilat SZ. Outpatient Palliative Care for Noncancer Illnesses: One Program's Experience with Implementation, Impact, and Lessons Learned. TO REMOVE 2022. PMID: 35442773


  6. Fahrner-Scott K, Zapata C, O'Riordan DL, Cohen E, Rosow L, Pantilat SZ, Lomen-Hoerth C, Bischoff KE. Embedded Palliative Care for Amyotrophic Lateral Sclerosis: A Pilot Program and Lessons Learned. Neurology. Clinical practice 2022. PMID: 36157626


  7. van Zyl C, O'Riordan DL, Kerr KM, Harris HA. Doing More with the Same: Comparing Public and Private Hospital Palliative Care within California. Journal of palliative medicine 2022. PMID: 35085457


  8. Deng LX, Bischoff KE, Kent DS, O'Riordan DL, Pantilat SZ, Lai JC. Frailty is strongly associated with self-reported symptom burden among patients with cirrhosis. European journal of gastroenterology & hepatology 2021. PMID: 33731588


  9. Deng LX, Kent DS, O'Riordan DL, Pantilat SZ, Lai JC, Bischoff KE. Symptom Burden Is Associated with Increased Emergency Department Utilization among Patients with Cirrhosis. Journal of palliative medicine 2021. PMID: 34348042


  10. Cobert J, Cook AC, Lin JA, O'Riordan DL, Pantilat SZ. Trends in Palliative Care Consultations in Critically Ill Patient Populations, 2013-2019. Journal of pain and symptom management 2021. PMID: 34348177


  11. Bischoff KE, Choi S, Su A, Cohen E, O'Riordan DL, Oettel E, Blachman M, Meister S, Zapata C, Lindenfeld P, Calton B, Witt L, Pantilat SZ, Shah RJ. Better Together: A Mixed-Methods Study of Palliative Care Co-Management for Patients with Interstitial Lung Disease. Journal of palliative medicine 2021. PMID: 34115958


  12. Calton B, Shibley WP, Cohen E, Pantilat SZ, Rabow MW, O'Riordan DL, Bischoff KE. Patient and Caregiver Experience with Outpatient Palliative Care Telemedicine Visits. Palliative medicine reports 2020. PMID: 34223495


  13. Smith GM, Calton BA, Rabow MW, Marks AK, Bischoff KE, Pantilat SZ, O'Riordan DL. Comparing the Palliative Care Needs of Patients Seen by Specialty Palliative Care Teams at Home Versus in Clinic. Journal of pain and symptom management 2020. PMID: 33246071


  14. Bischoff KE, Zapata C, Sedki S, Ursem C, O'Riordan DL, England AE, Thompson N, Alfaro A, Rabow MW, Atreya CE. Embedded palliative care for patients with metastatic colorectal cancer: a mixed-methods pilot study. Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer 2020. PMID: 32285263


  15. Liu AY, O'Riordan DL, Marks AK, Bischoff KE, Pantilat SZ. A Comparison of Hospitalized Patients With Heart Failure and Cancer Referred to Palliative Care. JAMA network open 2020. PMID: 32101304


  16. Schoenherr LA, Bischoff KE, Marks AK, O'Riordan DL, Pantilat SZ. Trends in Hospital-Based Specialty Palliative Care in the United States From 2013 to 2017. JAMA network open 2019. PMID: 31808926


  17. Ufere NN, O'Riordan DL, Bischoff KE, Marks AK, Eneanya N, Chung RT, Jackson V, Pantilat SZ, El-Jawahri A. Outcomes of Palliative Care Consultations for Hospitalized Patients with Liver Disease. Journal of pain and symptom management 2019. PMID: 31326503


  18. O'Riordan DL, Rathfon MA, Joseph DM, Hawgood J, Rabow MW, Dracup KA, De Marco T, Pantilat SZ. Feasibility of Implementing a Palliative Care Intervention for People with Heart Failure: Learnings from a Pilot Randomized Clinical Trial. Journal of palliative medicine 2019. PMID: 31099698


  19. Taylor BL, O'Riordan DL, Pantilat SZ, Creutzfeldt CJ. Inpatients with neurologic disease referred for palliative care consultation. Neurology 2019. PMID: 30918095


  20. Raghavan K, Copeland TP, Rabow M, Ladenheim M, Marks A, Pantilat SZ, O'Riordan D, Seidenwurm D, Franc B. Palliative care and imaging utilisation for patients with cancer. BMJ supportive & palliative care 2019. PMID: 30826736


  21. Magalhaes S, Banwell B, Bar-Or A, Fortier I, Hanwell HE, Lim M, Matt GE, Neuteboom RF, O'Riordan DL, Schneider PK, Pugliatti M, Shatenstein B, Tansey CM, Wassmer E, Wolfson C. A framework for measurement and harmonization of pediatric multiple sclerosis etiologic research studies: The Pediatric MS Tool-Kit. Multiple sclerosis (Houndmills, Basingstoke, England) 2018. PMID: 29932341


  22. Bischoff K, O'Riordan DL, Marks AK, Sudore R, Pantilat SZ. Care Planning for Inpatients Referred for Palliative Care Consultation. Volume 178 of Issue 1. JAMA internal medicine 2018. PMID: 29159371


  23. Bischoff KE, O'Riordan DL, Fazzalaro K, Kinderman A, Pantilat SZ. Identifying Opportunities to Improve Pain Among Patients With Serious Illness. Journal of pain and symptom management 2017. PMID: 29030211


  24. Anderson WG, Puntillo K, Cimino J, Noort J, Pearson D, Boyle D, Grywalski M, Meyer J, O'Neil-Page E, Cain J, Herman H, Barbour S, Turner K, Moore E, Liao S, Ferrell B, Mitchell W, Edmonds K, Fairman N, Joseph D, MacMillan J, Milic MM, Miller M, Nakagawa L, O'Riordan DL, Pietras C, Thornberry K, Pantilat SZ. Palliative Care Professional Development for Critical Care Nurses: A Multicenter Program. American journal of critical care : an official publication, American Association of Critical-Care Nurses 2017. PMID: 28864431


  25. Grubbs V, O'Riordan D, Pantilat S. Characteristics and Outcomes of In-Hospital Palliative Care Consultation among Patients with Renal Disease Versus Other Serious Illnesses. Volume 12 of Issue 7. Clinical journal of the American Society of Nephrology : CJASN 2017. PMID: 28655708


  26. Pantilat SZ, Marks AK, Bischoff KE, Bragg AR, O'Riordan DL. The Palliative Care Quality Network: Improving the Quality of Caring. Journal of palliative medicine 2017. PMID: 28384070


  27. Gordon NA, O'Riordan DL, Dracup KA, De Marco T, Pantilat SZ. Let Us Talk About It: Heart Failure Patients' Preferences Toward Discussions about Prognosis, Advance Care Planning, and Spiritual Support. Journal of palliative medicine 2016. PMID: 27603266


  28. Thygeson NM, Wang M, O'Riordan D, Pantilat SZ. Self-Reported California Hospital Palliative Care Program Composition, Certification, and Staffing Level Are Associated with Lower End-of-Life Medicare Utilization. Journal of palliative medicine 2016. PMID: 27508981


  29. Pantilat SZ, O'Riordan DL, Rathfon MA, Dracup KA, De Marco T. Etiology of Pain and Its Association with Quality of Life among Patients with Heart Failure. Journal of palliative medicine 2016. PMID: 27494139


  30. Beck KR, Pantilat SZ, O'Riordan DL, Peters MG. Use of Palliative Care Consultation for Patients with End-Stage Liver Disease: Survey of Liver Transplant Service Providers. Volume 19 of Issue 8. Journal of palliative medicine 2016. PMID: 27092870


  31. Kamal AH, Harrison KL, Bakitas M, Dionne-Odom JN, Zubkoff L, Akyar I, Pantilat SZ, O'Riordan DL, Bragg AR, Bischoff KE, Bull J. Improving the Quality of Palliative Care Through National and Regional Collaboration Efforts. Volume 22 of Issue 4. Cancer control : journal of the Moffitt Cancer Center 2015. PMID: 26678966


  32. Bertain CJ, O'Riordan DL, Pantilat SZ. Learning from those without: identifying barriers and creating solutions to establishing hospital palliative care services. Journal of hospital medicine 2014. PMID: 25523274


  33. Rabow MW, O'Riordan DL, Pantilat SZ. A statewide survey of adult and pediatric outpatient palliative care services. Journal of palliative medicine 2014. PMID: 25137356


  34. Reid T, O'Riordan DL, Mazzini A, Bruno KA, Pantilat SZ. Pediatric palliative care consultation services in California hospitals. Journal of palliative medicine 2014. PMID: 25299845


  35. Pantilat SZ, O'Riordan DL, Bruno KA. Two steps forward, one step back: changes in palliative care consultation services in California hospitals from 2007 to 2011. Journal of palliative medicine 2014. PMID: 25084528


  36. Gomutbutra P, O'Riordan DL, Pantilat SZ. Management of moderate-to-severe dyspnea in hospitalized patients receiving palliative care. Journal of pain and symptom management 2012. PMID: 22940561


  37. Schenker Y, Fernandez A, Kerr K, O'Riordan D, Pantilat SZ. Interpretation for discussions about end-of-life issues: results from a National Survey of Health Care Interpreters. Journal of palliative medicine 2012. PMID: 22788909


  38. Pantilat SZ, O'Riordan DL, Dibble SL, Landefeld CS. An assessment of the screening performance of a single-item measure of depression from the Edmonton Symptom Assessment Scale among chronically ill hospitalized patients. Journal of pain and symptom management 2012. PMID: 22560356


  39. Lawler S, McDermott L, O'Riordan D, Spathonis K, Eakin E, Leslie E, Gallois C, Berndt N, Owen N. Relationships of sun-protection habit strength with sunscreen use during outdoor sport and physical activity. International journal of environmental research and public health 2012. PMID: 22690172


  40. Pantilat SZ, Kerr KM, Billings JA, Bruno KA, O'Riordan DL. Characteristics of palliative care consultation services in California hospitals. Journal of palliative medicine 2012. PMID: 22394365


  41. Pantilat SZ, O'Riordan DL, Dibble SL, Landefeld CS. Longitudinal assessment of symptom severity among hospitalized elders diagnosed with cancer, heart failure, and chronic obstructive pulmonary disease. Journal of hospital medicine 2012. PMID: 22371388


  42. Berger GN, O'Riordan DL, Kerr K, Pantilat SZ. Prevalence and characteristics of outpatient palliative care services in California. Archives of internal medicine 2011. PMID: 21986345


  43. Pantilat SZ, Kerr KM, Billings JA, Bruno KA, O'Riordan DL. Palliative care services in California hospitals: program prevalence and hospital characteristics. Journal of pain and symptom management 2011. PMID: 21802898


  44. Berndt NC, O'Riordan DL, Winkler E, McDermott L, Spathonis K, Owen N. Social cognitive correlates of young adult sport competitors' sunscreen use. Health education & behavior : the official publication of the Society for Public Health Education 2011. PMID: 21059896


  45. Pantilat SZ, O'Riordan DL, Dibble SL, Landefeld CS. Hospital-based palliative medicine consultation: a randomized controlled trial. Archives of internal medicine 2010. PMID: 21149765


  46. Glanz K, Gies P, O'Riordan DL, Elliott T, Nehl E, McCarty F, Davis E. Validity of self-reported solar UVR exposure compared with objectively measured UVR exposure. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2010. PMID: 20940277


  47. O'Riordan DL, Nehl E, Gies P, Bundy L, Burgess K, Davis E, Glanz K. Validity of covering-up sun-protection habits: Association of observations and self-report. Journal of the American Academy of Dermatology 2009. PMID: 19278750


  48. Maddock JE, O'Riordan DL, Lee T, Mayer JA, McKenzie TL. Use of sunglasses in public outdoor recreation settings in Honolulu, Hawaii. Optometry and vision science : official publication of the American Academy of Optometry 2009. PMID: 19156011


  49. O'Riordan DL, Steffen AD, Lunde KB, Gies P. A day at the beach while on tropical vacation: sun protection practices in a high-risk setting for UV radiation exposure. Archives of dermatology 2008. PMID: 19015419


  50. Glanz K, McCarty F, Nehl EJ, O'Riordan DL, Gies P, Bundy L, Locke AE, Hall DM. Validity of self-reported sunscreen use by parents, children, and lifeguards. American journal of preventive medicine 2008. PMID: 18945582


  51. Glanz K, Yaroch AL, Dancel M, Saraiya M, Crane LA, Buller DB, Manne S, O'Riordan DL, Heckman CJ, Hay J, Robinson JK. Measures of sun exposure and sun protection practices for behavioral and epidemiologic research. Archives of dermatology 2008. PMID: 18283179


  52. O'Riordan DL, Glanz K, Gies P, Elliott T. A pilot study of the validity of self-reported ultraviolet radiation exposure and sun protection practices among lifeguards, parents and children. Photochemistry and photobiology 2008. PMID: 18179624


  53. Sutton NM, Suzuki TM, Della D, Albright C, O'Riordan DL. Involving Hawai'i's youth as partners in global health initiatives to impact change at the local level. Hawaii medical journal 2007. PMID: 20879470


  54. Maddock JE, O'Riordan DL, Lunde KB, Steffen A. Sun protection practices of beachgoers using a reliable observational measure. Annals of behavioral medicine : a publication of the Society of Behavioral Medicine 2007. PMID: 17688402


  55. Glanz K, Jarrette AD, Wilson EA, O'Riordan DL, Jacob Arriola KR. Reducing minors' access to tobacco: eight years' experience in Hawaii. Preventive medicine 2006. PMID: 17084888


  56. O'Riordan DL, Lunde KB, Steffen AD, Maddock JE. Validity of beachgoers' self-report of their sun habits. Archives of dermatology 2006. PMID: 17043185


  57. O'Riordan DL, Field AE, Geller AC, Brooks DR, Aweh G, Colditz GA, Frazier AL. Frequent tanning bed use, weight concerns, and other health risk behaviors in adolescent females (United States). Cancer causes & control : CCC 2006. PMID: 16633915


  58. O'Riordan DL, Sutton N. A community-based approach to tobacco prevention: Hawaii's youth taking on the tobacco industry. Hawaii medical journal 2005. PMID: 16379225


  59. O'Riordan DL, Lunde KB, Urschitz J, Glanz K. A noninvasive objective measure of sunscreen use and reapplication. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2005. PMID: 15767357


  60. Geller AC, Shamban J, O'Riordan DL, Slygh C, Kinney JP, Rosenberg S. Raising sun protection and early detection awareness among Florida high schoolers. Pediatric dermatology 2005. PMID: 15804297


  61. Geller AC, O'Riordan DL, Oliveria SA, Valvo S, Teich M, Halpern AC. Overcoming obstacles to skin cancer examinations and prevention counseling for high-risk patients: results of a national survey of primary care physicians. The Journal of the American Board of Family Practice 2004. PMID: 15575033


  62. O'Riordan DL, Geller AC, Brooks DR, Zhang Z, Miller DR. Sunburn reduction through parental role modeling and sunscreen vigilance. The Journal of pediatrics 2003. PMID: 12520258


  63. Stanton WR, Chakma B, O'Riordan DL, Eyeson-Annan M. Sun exposure and primary prevention of skin cancer for infants and young children during autumn/winter. Australian and New Zealand journal of public health 2000. PMID: 10790938


  64. O'Riordan DL, Stanton WR, Eyeson-Annan M, Gies P, Roy C. Correlations between reported and measured ultraviolet radiation exposure of mothers and young children. Photochemistry and photobiology 2000. PMID: 10649890