Employees with either obstructive sleep apnea or excessive daytime sleepiness were shown to be 2 times more likely to be involved in occupational incidents, highlighting the serious safety hazard posed by both conditions.

Employees with either obstructive sleep apnea (OSA) or excessive daytime sleepiness (EDS) were shown to be 2 times more likely to be involved in occupational incidents, highlighting the serious safety hazard posed by both conditions.

Published in The International Journal of Occupational and Environmental Medicine, study authors note that globally, 1000 people are estimated to die each day from occupational accidents. To assess the safety performance of employees, employers can utilize reactive and proactive methods, in which reactive or lagging methods evaluate occupational incidents using past data and proactive or leading methods measure employees' behavior in the workplace. 

Sleep disorders and EDS have been highlighted as chief factors affecting the safety of workers, with sleep deprivation associated with impaired cognitive and motor functions. OSA, a significant cause of EDS, has already been indicated in previous studies to increase the odds of occupational accidents by almost 2-fold. As a prior study conducted by the National Sleep Foundation indicated that 26% of US workers were shown to experience EDS, the safety of numerous US workers may be compromised by these conditions if left untreated or unsupervised.

Researchers indicate that while there has been previous research on the relationship between sleep disorders and occupational incidents, there is insufficient data on the effect of OSA and EDS on employee safety performance. Study authors sought to examine the simultaneous effect of sleep disorders through the scope of both proactive and reactive data measurements of safety performances, a link that has never been examined prior.

The cross-sectional study included 661 employees (mean age = 34.7 years; 95% male) working in the operational and executive sections of an oil construction company in Iran. EDS was analyzed in the study cohort by the STOP-BANG questionnaire and Epworth Sleepiness Scale (ESS), which were then measured in relation to reactive data and proactive safety performance indices indicated as accidents causing injury and near misses.

Predictor and demographic variables were determined with hierarchical multiple linear regression.

In the symptom screening, more than 27% of workers exhibited abnormal drowsiness (score > 10) in the ESS scores and 37.2% of those in the STOP-BANG screen had symptoms associated with OSA (score ≥ 3). For those experiencing EDS symptoms, they had a lower safety behavior score and were more commonly associated with occupational accidents and near misses.

Additionally, the STOP-BANG and ESS scores showed significant negative correlations with variables safety compliance (β = 0.228, β = 0.370), safety participation (β = 0.210, β = 0.144), and total score of safety behavior (β = 0.332, β = 0.213). Based on reports of occupational incidents in relation with both variables of sleep disorder, workers with EDS were 2.5 times more likely and those with OSA were 2 times more likely to be involved compared with workers who did not have these conditions.

Researchers stressed that as EDS serves as a significant hazard in workplaces, improving sleep hygiene through education could prove crucial in preventing workplace accidents, injuries, and near-misses. “In addition, better monitoring of sleep hygiene in periodical medical examination of workers, and reviewing systems of allocating breaks, and opportunities for restorative rest during such breaks, are management procedures that will contribute to improving the safety performance in all safety critical work,” said the study authors.

Reference