IHPME led study finds impact of hospital harm costs Ontario health system $1 billion

August 23, 2019

Share Post

Getting an infection while in hospital, having an adverse reaction to a medication, or even worse, having something left inside youempty hospital corridor with doors and windows after surgery are all examples of adverse events that patients are at risk of experiencing during a hospital stay. In 2015, The Canadian Institute for Health Information (CIHI), in partnership with the Canadian Patient Safety Institute (CPSI), created a measuring tool that identified these types of adverse events (termed ‘hospital harm’) using hospital discharge data.

Now, researchers from Dalla Lana School of Public Health’s Institute of Health Policy, Management and Evaluation, have used this data tool to estimate, for the first time, the impact of hospital harm on Ontario’s health system, and the striking result is a cost upwards of $1 billion and close to 408,000 additional hospital days.

Read more about the study in White Coat, Black Art.

“Experiencing harm in hospital can extend your stay, which is well-established, but what is novel about our study is that we show that its impact extends to post-discharge health services utilization and estimate the total health system impact of that harm on our resources,” said Lauren Tessier, lead author of the study and a PhD student at IHPME.

Profile of Lauren Tessier
Lauren Tessier

Tessier and her fellow researchers measured the occurrence of hospital harm within patient centered episodes or PCEs, a methodology that was only recently developed by IHPME associate professor Sara Guilcher, who is also a co-author on this study.

“Using the PCE methodology allowed us to capture all acute and post-acute care information including readmissions to hospital, pharmacy use, and home care,” said Tessier. “We’ve been able to determine that hospital harm extends the time that people use health system resources and therefore, the length of their PCE.”

A PCE follows a patient over time starting from the moment they are hospitalized and captures all subsequent care until an individual has returned to the community and is stabilized for 30 days without any institutional admissions. For the purpose of this study, Tessier and colleagues examined nine specific PCE types and, as per the hospital harm measure, looked at four categories of harm, including healthcare/medication-associated conditions, infections, patient accidents and procedure-associated conditions.

Of the patients included in the study, 36,004, or approximately 6%, experienced a hospital harm during their hospitalization, with the most common type of harm, over 50%, occurring in the healthcare/medication category.

“This category of harm includes medication incidents, such as an unintended reaction or an error in dosage or administration, as well as events such as delirium and pressure ulcers,” explained Tessier.

Tessier also points out that that the findings of the study need to be balanced against its limitations including whether all adverse events are preventable.

“Hospitals are complex ecosystems,” said Tessier, “these findings are not meant to point the finger at hospitals, but rather to raise awareness on the need to collaboratively work with all relevant stakeholders, including patients, clinicians and hospital administrators, to develop action plans and provide context to these numbers.”

The study is published in the Canadian Medical Association Journal.

Related News

The research team that have received funding to study brain aging and dementia prevention. Dr. Husam Abdel-Qadir, Principal Investigator Kuan Liu, Dr. Geoffrey M. Anderson, and Renzo Jose Carlos Calderon Anyosa.

IHPME Researchers Receive CIHR Grant to Advance Dementia Prevention

July 2, 2025

Faculty / Research

Read More
A man in a black suit jacket and light-colored shirt stands in front of a blurred building background. The image has colored bars in the corners: blue and purple in the top left, and orange and green in the bottom right.

IHPME Faculty Presented With Insulin Banting Award for Redefining Diabetes Care

June 20, 2025

Faculty / Research

Read More

IHPME Students Recognized as 2025-26 CGS Doctoral Scholars

June 19, 2025

Research / Students

Read More
A digitally altered photo of three people standing side by side with faces obscured by gray rectangles; the background is a blurred, blue-tinted urban scene with colorful bars in orange, green, and purple in the corners.

IHPME-Affiliated Team Looped Advances in AI Competition

May 27, 2025

Faculty / Research / Students

Read More
A collage of images from the 21st Annual Research and Impact Day. The images include various scenes such as people receiving awards, attendees engaging in discussions, a keynote speaker presenting, and a display table with informational materials.

Bridging Research and Reality: 21st Annual Research and Impact Day Highlights Innovation and Collaboration

May 12, 2025

Faculty / Research / Students

Read More
A group of people are posing for a photo in a classroom. They are standing and kneeling in front of a large white projection screen. The room has wooden paneling on the walls and several desks with chairs arranged in rows. Some individuals are wearing masks, and various casual outfits can be seen.

Innovation in Action: Highlights from the 6th Health Systems AI Hackathon

April 30, 2025

Faculty / Research / Students

Read More

Sign up for IHPME Connect.

Keep up to date with IHPME’s News & Research, Events & Program, Recognition, e-newsletter.

Subscribe to Connect Newsletter

Get in Contact


Communications

Marielle Boutin
Email Address: ihpme.communications@​utoronto.ca

Manages all IHPME-wide communications and marketing initiatives, including events and announcements.