Robson Lynda S, Landsman Victoria, Latour-Villamil Desiree, Lee Hyunmi, Mustard Cameron
Institute for Work & Health, Toronto, Ontario, Canada
Institute for Work & Health, Toronto, Ontario, Canada.
Occup Environ Med. 2022 Mar;79(3):169-175. doi: 10.1136/oemed-2021-107617. Epub 2021 Sep 20.
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.
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.
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).
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.
在更近的时间段内重复之前的一项横断面研究，以评估工会化与工伤赔偿申请风险之间的关联。
抽样框架为2012 - 2018年加拿大安大略省工业、商业和机构建设部门的工伤赔偿公司账户记录。通过与工会承包商的记录进行关联来确定公司的工会化状态。结果是工伤赔偿申请的累计计数，按公司业务进行汇总。使用多变量负二项回归模型估计风险比率。模型还分别针对按公司规模分层的误工索赔进行拟合。
企业工会化与较低的误工索赔发生率相关（粗风险比率，CRR = 0.69，95%置信区间0.65至0.74）；调整后风险比率，ARR = 0.75，95%置信区间0.71至0.80）。在亚组分析中，随着公司规模减小，ARR的幅度下降，对于全职等效员工≤4人的最小规模公司，该比率无统计学意义。在粗模型中，工会化与无误工索赔的发生率呈正相关，但在调整模型中并非如此（CRR = 1.80，95%置信区间1.71至1.89；ARR = 1.04，95%置信区间0.98至1.09）。
公司工会化与较低的误工工伤赔偿申请风险相关，证实了早期类似研究的结果。工会化的保护作用随着公司规模减小而下降。与之前的研究不同，未发现公司工会化与无误工索赔发生率之间存在正相关关系，部分原因是方法上的改进。
