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

OBJECTIVES: To understand rates of work-related COVID-19 (WR-C19) infection by occupational exposures across waves of the COVID-19 pandemic in Ontario, Canada. METHODS: We combined workers' compensation claims for COVID-19 with data from Statistics Canada's Labour Force Survey, to estimate rates of WR-C19 among workers spending the majority of their working time at the workplace between 1 April 2020 and 30 April 2022. Occupational exposures, imputed using a job exposure matrix, were whether the occupation was public facing, proximity to others at work, location of work and a summary measure of low, medium and high occupational exposure. Negative binomial regression models examined the relationship between occupational exposures and risk of WR-C19, adjusting for covariates. RESULTS: Trends in rates of WR-C19 differed from overall COVID-19 cases among the working-aged population. All occupational exposures were associated with increased risk of WR-C19, with risk ratios for medium and high summary exposures being 1.30 (95% CI 1.09 to 1.55) and 2.46 (95% CI 2.10 to 2.88), respectively, in fully adjusted models. The magnitude of associations between occupational exposures and risk of WR-C19 differed across waves of the pandemic, being weakest for most exposures in period March 2021 to June 2021, and highest at the start of the pandemic and during the Omicron wave (December 2021 to April 2022). CONCLUSIONS: Occupational exposures were consistently associated with increased risk of WR-C19, although the magnitude of this relationship differed across pandemic waves in Ontario. Preparation for future pandemics should consider more accurate reporting of WR-C19 infections and the potential dynamic nature of occupational exposures.

Evaluation of the Ontario Mandatory Working-at-Heights Training Requirement in Construction, 2012‒2019.

The province of Ontario, Canada, implemented mandatory day-long training for construction workers required to use fall-protection equipment. More than 400 000 training sessions were completed by 2017 when the requirement took full effect. The lost-time workers' compensation claim incidence rate attributable to falls targeted by the training was 19% lower in 2017-2019 than in 2012-2014. Rates for two comparator injuries increased or stayed the same. The decline in targeted fall claim incidence rate of the other Canadian provinces was 6%. (Am J Public Health. 2024;114(1):38-41. https://doi.org/10.2105/AJPH.2023.307440).

A rapid review of systematic reviews on the effectiveness of synchronous online learning in an occupational context.

BACKGROUND: This study examined the effectiveness of synchronous online learning (SOL) for occupational purposes relative to face-to-face (F2F) learning. METHODS: Seven bibliographic databases were searched, and publications meeting the inclusion criteria were sought. Title and abstract screening, article screening, methodological quality assessment, and data extraction were carried out by two independent reviewers. RESULTS: Three systematic reviews meeting the inclusion criteria were consistent in providing evidence that there was generally no difference between SOL and F2F learning in their effects on knowledge or skills. CONCLUSIONS: Based on the sparse evidence base examined in this review, we conclude that SOL and traditional F2F learning for occupational or career preparation purposes are similarly effective for learners at the undergraduate level or higher. Much caution should be taken with this assumption when delivering content of a more hands-on nature and when adult learners have less educational preparation, since research is lacking in these areas.

Unionisation and injury risk in construction: a replication study.

OBJECTIVE: To replicate, in a more recent time period, a previous cross-sectional study to estimate the association between unionisation and the risk of workers' compensation injury claims. METHODS: The sampling frame was workers' compensation company account records in the industrial, commercial and institutional construction sector in the province of Ontario, Canada, 2012-2018. Company unionisation status was determined through linkage with records of unionised contractors. Outcomes were cumulative counts of workers' compensation injury claims, aggregated to company business. Risk ratios were estimated with multivariable negative binomial regression models. Models were also fit separately to lost-time claims stratified by company size. RESULTS: Business unionisation was associated with a lower lost-time claim incidence (crude risk ratio, CRR=0.69, 95% CI 0.65 to 0.74); adjusted risk ratio, ARR=0.75, 95% CI 0.71 to 0.80). In subgroup analyses, the magnitude of the ARR declined as company size decreased and was not statistically significant for the smallest-sized companies of ≤4 full-time equivalent employees. Unionisation was associated (positively) with the incidence of no-lost-time claims in a crude model, but not in an adjusted one (CRR=1.80, 95% CI 1.71 to 1.89; ARR=1.04, 95% CI 0.98 to 1.09). CONCLUSIONS: Company unionisation was associated with a lower risk of lost-time workers' compensation injury claims, corroborating a similar study from an earlier time period. The protective effect of unionisation declined as company size decreased. In contrast to the previous study, a positive relationship between company unionisation and no-lost-time claim incidence was not found, due in part to a methodological refinement.

Preventing fall-from-height injuries in construction: Effectiveness of a regulatory training standard.

INTRODUCTION: A regulatory training standard for construction workers using fall protection equipment became mandatory in 2015 in the province of Ontario, Canada. By the end of the transition period in 2017, 418,000 workers had been trained to the new standard. Two primary research questions were posed: (1) To what extent does the WAH training affect practices at the worksite? and (2) Has there been a change in the incidence of fall-from-height injuries coincident with the introduction of the WAH Training Standard? MATERIALS AND METHODS: A longitudinal survey of 633 learners was conducted in 2017 at one-, four- and seven-week post-training. A quasi-experiment estimated the incidence of lost-time injuries attributed to falls from heights in 2017 compared to 2012-2014 for a census of construction workers insured for work disability in Ontario, Canada. RESULTS: Learners self-reported substantial increases in knowledge of and improvements in safe work practices when working at heights. The incidence rate of lost-time claim injuries attributed to falls targeted by the training declined by 19.6% (95% CI: 10.7, -27.6), compared to corresponding declines of 2.1% (95% CI: -6.3, 9.9) for other fall injuries and 7.2% (95% CI: 1.8, 12.3) for non-fall traumatic injuries. The observed decline was largest among the smallest employers (<5 full-time equivalent employees). CONCLUSION: The evaluation findings provide consistent support for a conclusion that the mandatory training standard was effective in reducing the incidence of injuries targeted by the training. However, the effects were modest and did not eliminate the problem. Practical application: A mandatory training standard should be considered as one approach to preventing traumatic injuries. However, other approaches higher in the hierarchy of risk controls should also be considered.

Larger Workplaces, People-Oriented Culture, and Specific Industry Sectors Are Associated with Co-Occurring Health Protection and Wellness Activities.

Employers are increasingly interested in offering workplace wellness programs in addition to occupational health and safety (OHS) activities to promote worker health, wellbeing, and productivity. Yet, there is a dearth of research on workplace factors that enable the implementation of OHS and wellness to inform the future integration of these activities in Canadian workplaces. This study explored workplace demographic factors associated with the co-implementation of OHS and wellness activities in a heterogenous sample of Canadian workplaces. Using a cross-sectional survey of 1285 workplaces from 2011 to 2014, latent profiles of co-occurrent OHS and wellness activities were identified, and multinomial logistic regression was used to assess associations between workplace demographic factors and the profiles. Most workplaces (84%) demonstrated little co-occurrence of OHS and wellness activities. Highest co-occurrence was associated with large workplaces (odds ratio (OR) = 3.22, 95% confidence interval (CI) = 1.15⁻5.89), in the electrical and utilities sector (OR = 5.57, 95% CI = 2.24⁻8.35), and a high people-oriented culture (OR = 4.70, 95% CI = 1.59⁻5.26). Promoting integrated OHS and wellness approaches in medium to large workplaces, in select industries, and emphasizing a people-oriented culture were found to be important factors for implementing OHS and wellness in Canadian organizations. Informed by these findings, future studies should understand the mechanisms to facilitate the integration of OHS and wellness in workplaces.

Developing leading indicators from OHS management audit data: Determining the measurement properties of audit data from the field.

INTRODUCTION: OHS management audits are one means of obtaining data that may serve as leading indicators. The measurement properties of such data are therefore important. This study used data from Workwell audit program in Ontario, a Canadian province. The audit instrument consisted of 122 items related to 17 OHS management elements. The study sought answers regarding (a) the ability of audit-based scores to predict workers' compensation claims outcomes, (b) structural characteristics of the data in relation to the organization of the audit instrument, and (c) internal consistency of items within audit elements. METHOD: The sample consisted of audit and claims data from 1240 unique firms that had completed one or two OHS management audits during 2007-2010. Predictors derived from the audit results were used in multivariable negative binomial regression modeling of workers' compensation claims outcomes. Confirmatory factor analyses were used to examine the instrument's structural characteristics. Kuder-Richardson coefficients of internal consistency were calculated for each audit element. RESULTS: The ability of audit scores to predict subsequent claims data could not be established. Factor analysis supported the audit instrument's element-based structure. KR-20 values were high (≥0.83). CONCLUSIONS: The Workwell audit data display structural validity and high internal consistency, but not, to date, construct validity, since the audit scores are generally not predictive of subsequent firm claim experience. Audit scores should not be treated as leading indicators of workplace OHS performance without supporting empirical data. PRACTICAL APPLICATIONS: Analyses of the measurement properties of audit data can inform decisionmakers about the operation of an audit program, possible future directions in audit instrument development, and the appropriate use of audit data. In particular, decision-makers should be cautious in their use of audit scores as leading indicators, in the absence of supporting empirical data.

Response to Weinstock and Slatin's (2012) critique of IWH-NIOSH systematic review of the effectiveness of OSH training.

This commentary responds to the recent critique by Weinstock and Slatin [1] of our systematic review on the effectiveness of occupational safety and health (OSH) training conducted jointly by the Institute for Work & Health (IWH) in Canada and the National Institute for Occupational Safety and Health (NIOSH) in the United States [2, 3]. We address misunderstandings of our perspectives on training, especially empowerment training, and the evaluation of such training.

A systematic review of the effectiveness of occupational health and safety training.

OBJECTIVES: Training is regarded as an important component of occupational health and safety (OHS) programs. This paper primarily addresses whether OHS training has a beneficial effect on workers. The paper also examines whether higher engagement OHS training has a greater effect than lower engagement training. METHODS: Ten bibliographic databases were searched for pre-post randomized trial studies published in journals between 1996 and November 2007. Training interventions were included if they were delivered to workers and were concerned with primary prevention of occupational illness or injury. The methodological quality of each relevant study was assessed and data was extracted. The impacts of OHS training in each study were summarized by calculating the standardized mean differences. The strength of the evidence on training's effectiveness was assessed for (i) knowledge, (ii) attitudes and beliefs, (iIi) behaviors, and (iv) health using the US Centers for Disease Control and Prevention's Guide to Community Preventive Services, a qualitative evidence synthesis method. RESULTS: Twenty-two studies met the relevance criteria of the review. They involved a variety of study populations, occupational hazards, and types of training. Strong evidence was found for the effectiveness of training on worker OHS behaviors, but insufficient evidence was found of its effectiveness on health (ie, symptoms, injuries, illnesses). CONCLUSIONS: The review team recommends that workplaces continue to deliver OHS training to employees because training positively affects worker practices. However, large impacts of training on health cannot be expected, based on research evidence.

Measurement properties of occupational health and safety management audits: a systematic literature search and traditional literature synthesis.

OBJECTIVE: The measurement properties of Occupational Health and Safety (OHS) management audits might be important in some applications, especially when audit scores are treated as performance measures. The review, therefore, sought to identify and summarize the research evidence on the measurement properties (e.g., reliability, validity) of methods of OHS management audit. METHODS: Bibliographic databases in business, medicine and OHS were systematically searched. Evidence from relevant publications was synthesized using traditional narrative review methods. SYNTHESIS: The literature on the measurement properties of OHS management audit methods is sparse. Seventeen relevant audit methods were identified. Content validity was demonstrated for only five audit methods. Inter-rater reliability was formally tested for only three audit methods and construct validity for only one. There were no studies of test-retest reliability or responsiveness. The investigations of inter-rater reliability (i.e., consistency among auditors) showed that it is often unacceptably low. CONCLUSION: There is a research gap concerning the measurement properties of OHS management audit methods. The available research raises questions about the properties of audit methods in current use.

Something might be missing from occupational health and safety audits: findings from a content validity analysis of five audit instruments.

OBJECTIVE: The objective was to examine the content validity of occupational health and safety (OHS) management audit methods. METHODS: The documentation used by five broader public sector service organizations to audit OHS management in workplaces was analyzed with reference to a recent OHS management standard (CSA Z1000). RESULTS: A relatively high proportion of CSA Z1000's content (74%) was partially or fully represented on average in the audit methods. However, six management elements were found to be incompletely represented in three or more of the methods. The most extreme example is the Internal Audits element whose content was completely missing for three of the audit methods. CONCLUSION: Some OHS management audit instruments in current use are incomplete relative to a recent OHS management standard. It may be that some instruments warrant revision to better reflect current expert consensus.

Changes in job stressors in the Canadian working population.

OBJECTIVES: To determine the changes in levels of work stressors in a nationally representative sample of Canadian workers from 1994/95 to 2000/01. METHODS: We compared responses for an abbreviated version of the Job Content Questionnaire in two waves of the National Population Health Survey (NPHS). Other items and scales related to work and health were also analyzed. Data were transformed to range from 0 to 10. Comparisons of the 2000/01 data were also made with the Canadian Community Health Survey (CCHS) conducted in 2000. RESULTS: There were only very small absolute differences between NPHS 2000/01 data and CCHS 2000 data. The NPHS comparison from 1994/95 to 2000/01 showed an increase in job security (change in means = 0.49, 95% CI 0.39 to 0.58) and a decrease in job physical demands (change in means = 0.45, 95% CI 0.35 to 0.54). Other changes in work characteristics were small in absolute value. The combined "overall work stressors" index dropped by 0.12 (95% CI 0.08 to 0.15). CONCLUSIONS: Levels of work stressors did not increase over the period. Some subscales showed an improvement.

Quality of working life indicators in Canadian health care organizations: a tool for healthy, health care workplaces?

BACKGROUND: Quality-of-work-life (QWL) includes broad aspects of the work environment that affect employee learning and health. Canadian health care organizations (HCOs) are being encouraged to monitor QWL, expanding existing occupational health surveillance capacities. AIM: To investigate the understanding, collection, diffusion and use of QWL indicators in Canadian HCOs. METHODS: We obtained cooperation from six diverse public HCOs managing 41 sites. We reviewed documentation relevant to QWL and conducted 58 focus groups/team interviews with strategic, support and programme teams. Group interviews were taped, reviewed and analysed for themes using qualitative data techniques. Indicators were classified by purpose and HCO level. RESULTS: QWL indicators, as such, were relatively new to most HCOs yet the data managed by human resource and occupational health and safety support teams were highly relevant to monitoring of employee well-being (119 of 209 mentioned indicators), e.g. sickness absence. Monitoring of working conditions (62/209) was also important, e.g. indicators of employee workload. Uncommon were indicators of biomechanical and psychosocial hazards at work, despite their being important causes of morbidity among HCO employees. Although imprecision in the definition of QWL indicators, limited links with other HCO performance measures and inadequate HCO resources for implementation were common, most HCOs cited ways in which QWL indicators had influenced planning and evaluation of prevention efforts. CONCLUSIONS: Increase in targeted HCO resources, inclusion of other QWL indicators and greater integration with HCO management systems could all improve HCO decision-makers' access to information relevant to employee health.