Illness/injury prevention

IWH has a long history of conducting research to provide practical guidance to employers, workers, OHS professionals and regulators about what works and what doesn’t in injury or illness prevention. This research targets the injury and illness prevention practices of workplaces, as well as the programs developed by governments, health and safety associations and others to support and motivate workplaces to adopt effective practices.

Featured

Graphic of workers in front of a conveyor belt wearing safety gear, a robot holds a clipboard.
At Work article

Differences in firm-level AI use for health and safety

To what extent are Canadian workplaces using artificial intelligence (AI) to help support workers’ health and safety? And what do these workplaces have in common? An IWH study surveyed firms across Ontario and British Columbia to find out.
Published: October 8, 2025
A group of construction workers
Impact case study

Saskatchewan’s construction safety group uses IWH tool to improve safety culture

This case study details how the Saskatchewan Construction Safety Association (SCSA) members have been analyzing IWH-OPM scores to adjust their safety practices and how SCSA has been using the data to tailor their outreach.
Published: February 10, 2025
A New Zealand construction worker holding papers looking off-camera with a city skyline behind
Impact case study

Construction safety org adapts IWH research messages for tradesworker audience

A key program from Construction Health and Safety New Zealand—developed using IWH research—takes a participatory ergonomics approach to better prevent and manage musculoskeletal injuries among construction workers.
Published: February 2024
IWH Speaker Series
IWH Speaker Series

Is precarious employment an occupational hazard?

Precarious employment has become more common in the Canadian labour market, as well as in the labour markets of other high-income countries. In this presentation, Dr. Faraz Vahid Shahidi examines the consequences of precarious employment for health and safety at work. Drawing on compensation claims data from the Workplace Safety and Insurance Board and labour force estimates from Statistics Canada, Dr. Shahidi asks whether workers exposed to precarious employment – such as temporary, part-time, and low-wage jobs – are more likely to experience an occupational injury or illness. As a further source of evidence, he also assesses the impact of precarious employment on the workplace transmission of COVID-19.
Published: February 2024
Two workers wearing masks look at a tablet together
At Work article

What can work-related COVID-19 cases tell us about how to prepare for the next pandemic?

To what extent did workplace exposures account for the transmission of the COVID-19 virus during the first two years of the pandemic? A new study by IWH combined data sources to estimate work-related infection rates, using a method that took into account major shifts in where people worked. It found the role of work exposure changed from wave to wave, in a dynamic pattern not in keeping with the number of cases in the general population.
Published: February 2024
Journal article
Journal article

Variation in occupational exposure risk for COVID-19 workers' compensation claims across pandemic waves in Ontario

Published: Occupational & Environmental Medicine, February 2024
IWH Speaker Series
IWH Speaker Series

Refining estimates of occupational exposures and risk of workplace COVID-19 transmission

The COVID-19 pandemic shone a light on the importance of having accurate data on workplace exposure to infectious diseases. Efforts to estimate infection rates of COVID-19 during the public health emergency were hampered by inadequate information on key factors, such as whether an infected worker had worked from home or interacted with the public. In this presentation, Dr. Peter Smith shares results from a study that examined the risk of work-related COVID-19 infections. He discusses methods used by the team to combine data sources to take into account changes in labour market participation—including working from home—during different phases of the COVID-19 pandemic.
Published: January 2024
Journal article
Journal article

Evaluation of the Ontario mandatory working-at-heights training requirement in construction, 2012 - 2019

Published: American Journal of Public Health, January 2024
Roofers Tied Off with Nail Gunbooth IHSA
Impact case study

IWH evaluation of the effectiveness of the Ontario working-at-heights training standard

An IWH study on the effectiveness of Ontario's mandatory training was helpful to the labour ministry in several ways—including in reinforcing the value of program evaluations.
Published: November 2023
On-Site logo
IWH in the media

Study shows worker injuries due to falls from heights declined after Ontario made training standardized and mandatory

Among recent organized efforts to make jobsites safer, working-at-heights training has been effective, reports an Institute for Work & Health (IWH) study. As Adam Freill reports, in the three-year period after Ontario made working-at-heights training in the construction sector standardized and mandatory, study authors explain that the rate of fall-from-height injuries leading to time off work fell by 19 per cent.
Published: On-Site Magazine, November 2023
A residential home in mid-build is surrounded by scaffolding
At Work article

Safer work practices, lower injury rates maintained two years after Ontario’s working-at-heights training came into effect: study

In 2015, the Ontario government implemented a working-at-heights (WAH) training standard to ramp up fall prevention efforts. An IWH study team has now gathered two additional years of data on the effectiveness of this training requirement—both on work practices and injury rates.
Published: November 2023