Associate Professor

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
Bachelor of Teaching, 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. 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. 2023. PMID: 37380147


  3. 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. 2022. PMID: 35595374


  4. 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. 2022. PMID: 35442773


  5. 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. 2022. PMID: 36157626


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


  7. 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. 2021. PMID: 33731588


  8. 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. 2021. PMID: 34348042


  9. Cobert J, Cook AC, Lin JA, O'Riordan DL, Pantilat SZ. Trends in palliative care consultations in critically ill patient populations, 2013-2019. 2021. PMID: 34348177


  10. 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. 2021. PMID: 34115958


  11. 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. 2020. PMID: 34223495


  12. 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. 2020. PMID: 33246071


  13. 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. 2020. PMID: 32285263


  14. 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. 2020. PMID: 32101304


  15. 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. 2019. PMID: 31808926


  16. 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. 2019. PMID: 31326503


  17. 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. 2019. PMID: 31099698


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


  19. 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. 2019. PMID: 30826736


  20. 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. 2018. PMID: 29932341


  21. Bischoff K, O'Riordan DL, Marks AK, Sudore R, Pantilat SZ. Care Planning for Inpatients Referred for Palliative Care Consultation. 2018. PMID: 29159371


  22. Bischoff KE, O'Riordan DL, Fazzalaro K, Kinderman A, Pantilat SZ. Identifying Opportunities to Improve Pain Among Patients With Serious Illness. 2017. PMID: 29030211


  23. 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. 2017. PMID: 28864431


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


  25. 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. 2016. PMID: 27494139


  26. 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. 2015. PMID: 26678966


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


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


  29. Gomutbutra P, O'Riordan DL, Pantilat SZ. Management of moderate-to-severe dyspnea in hospitalized patients receiving palliative care. 2012. PMID: 22940561


  30. 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. 2012. PMID: 22788909


  31. 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. 2012. PMID: 22690172


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


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


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


  35. Berndt NC, O'Riordan DL, Winkler E, McDermott L, Spathonis K, Owen N. Social cognitive correlates of young adult sport competitors' sunscreen use. 2011. PMID: 21059896


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


  37. 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. 2010. PMID: 20940277


  38. 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. 2009. PMID: 19278750


  39. Maddock JE, O'Riordan DL, Lee T, Mayer JA, McKenzie TL. Use of sunglasses in public outdoor recreation settings in Honolulu, Hawaii. 2009. PMID: 19156011


  40. 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. 2008. PMID: 18945582


  41. 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. 2008. PMID: 18283179


  42. 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. 2007. PMID: 20879470


  43. Maddock JE, O'Riordan DL, Lunde KB, Steffen A. Sun protection practices of beachgoers using a reliable observational measure. 2007. PMID: 17688402


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


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


  46. 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). 2006. PMID: 16633915


  47. O'Riordan DL, Lunde KB, Urschitz J, Glanz K. A noninvasive objective measure of sunscreen use and reapplication. 2005. PMID: 15767357


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


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


  50. 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. 2000. PMID: 10790938


  51. 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. 2000. PMID: 10649890