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Established at the University of Pennsylvania in 1989, the Center for Health Outcomes and Policy Research, also known as CHOPR, operates as a unique community within the School of Nursing focusing on the outcomes of health care, health disparities, and health workforce policy.

Featured News Stories

Director, Dr. Linda H. Aiken, Inducted as Honorary Fellow by the Royal College of Surgeons. More

Associate Director, Dr. Eileen T. Lake, is the lead panelist at Southern Nursing Research Society Annual Meeting

Dr. Linda H. Aiken (left) with Chief Nurse of Ireland, Siobhan O'Halloran, Feb. 2019. Listen ...Dr. Linda H. Aiken (left) with Chief Nurse of Ireland, Siobhan O'Halloran, Feb. 2019. Listen to Dr. Aiken discuss nurse staffing levels in fifteen European hospitals with broadcast journalist, Mary Wilson. LInk Dr. Eileen Lake (left) coordinated the Meet the Editors Networking Session at the February confer...Dr. Eileen Lake (left) coordinated the Meet the Editors Networking Session at the February conference in Orlando, Florida. Editors from nine nursing journals served as panelists.

Featured Research Projects

Panel Study of Effects of Changes in Nursing on Patient Outcomes

  • Funded by the National Institute of Nursing Research Study
  • Principal Investigator: Linda H. Aiken, PhD, RN, FAAN, FRCN
  • Supplemental Study: Alzheimer’s Disease and its related Dementias (AD/ADRD)
  • Supplemental Study Principal Investigator: Olga Jarrín, PhD, RN

The Impact of Nursing on In-Hospital Cardiac Arrest Patient Outcomes

Neonatal Intensive Care Unit (NICU) Performance: Missed Nursing Care and Infant Outcomes

Disparities in the Outcomes and Processes of Care for In-Hospital Cardiac Arrest (IHCA): The Role of Differences in the Organization and Delivery of Nursing

Health services research on legislated nurse-to-patient ratios in Queensland, Australia

  • Funded by Queensland Health, Australia
  • CHOPR Principal Investigators: Linda H. Aiken, PhD, RN, FAAN,  Matthew McHugh, PhD, JD, MPH, RN, CRNP, FAAN
  • Partner Institution: Queensland University of Technology 


Featured Publications

Electronic Health Record Adoption and Nurse Reports of Usability and Quality of Care: The Role of Work Environment

Journal: Applied Clinical Formatics
Authors: Kutney-Lee, A, Sloane, DM, Bowles, KH, Aiken, LH. 

Our study findings suggest that adoption of a comprehensive  EHR system—with more advanced functionalities— is associated with greater nurse satisfaction with the system, more favorable reports of the system’s usability, and higher quality of care.

Nurses’ and patients’ appraisals show patient safety in hospitals remains a concern.

Journal: Health Affairs
Authors: Aiken LH, Sloane DM, Barnes H, Cimiotti J.

“Failure to substantially improve clinical work environments in most hospitals, as recommended by the Institute of Medicine, may be hampering progress toward improving patient safety.”

Rural and non-rural primary care physician practices increasingly rely on nurse practitioners.

Journal: Health Affairs
Authors: Barnes H, Richards MR, Martsolf G, & McHugh MD.

“Adding nurse practitioners is a useful way for practices to align themselves with contemporary efforts to improve access and performance. ” 

 The Association of the Nurse Work Environment and Patient Safety in Pediatric Acute Care.

Journal: Journal of Patient Safety
Authors: Lake ET, Roberts KE, Agosto PD, Ely E, Bettencourt A,Schierholz ES, Frankenberger WD, Catania G, Aiken LH.

“Improving clinical work environments in hospitals holds promise for achieving a culture of patient safety that increases the reliability of care and prevents harm “

Quality of end of life care and its association with nurse practice environments in US hospitals.

Journal: Journal of the American Geriatrics Society
Authors: Lasater K, McHugh MD, Sloane DM, Aiken LH.

“Quality of end‐of‐life care in US hospitals is imperfect and is significantly worse in hospitals with poor nurse practice environments than in hospitals with the best environments. ”

Effect of changes in hospital nursing resources on improvements in patient safety and quality of care: A panel study. 

Journal: Medical Care
Authors: Sloane DM, Smith HL, McHugh MD, Aiken LH.

“Improvements within hospitals in work environments, nurse staffing, and educational composition of nurses coincide with improvements in quality of care and patient safety. Cross-sectional results closely approximate longitudinal panel results.”