Objectives: Sleep disturbances can impair alertness and neurocognitive performance and increase the risk of falling asleep at the wheel. The authors investigated the prevalence of sleep disorders among public transport operators (PTOs) and assessed the interventional effects on hypersomnolence and neurocognitive function in those diagnosed with obstructive sleep apnea (OSA). Methods: Overnight polygraphy and questionnaire data from 101 volunteers (72 males, median age 48 range [22–64] years, 87 PTOs) employed at the Gothenburg Public Transportation Company were assessed. Treatment was offered in cases with newly detected OSA. Daytime sleep episodes and neurocognitive function were assessed before and after intervention. Results: At baseline, symptoms of daytime hypersomnolence, insomnia, restless legs syndrome as well as objectively assessed OSA (apnea hypopnea index (AHI, determined by polygraphic recording) = 17[5–46] n/h) were highly present in 26, 24, 10 and 22%, respectively. A history of work related traffic accident was more prevalent in patients with OSA (59%) compared to those without (37%, p < 0.08). In the intervention group (n = 12) OSA treatment reduced AHI by -23 [-81 to -5] n/h (p = 0.002), determined by polysomnography. Reduction of OSA was associated with a significant reduction of subjective sleepiness and blood pressure. Measures of daytime sleep propensity (microsleep episodes from 9 [0–20.5] to 0 [0–12.5], p < 0.01) and missed responses during performance tests were greatly reduced, indices of sustained attention improved. Conclusions: PTOs had a high prevalence of sleep disorders, particularly OSA, which demonstrated a higher prevalence of work related accidents. Elimination of OSA led to significant subjective and objective improvements in daytime function. The authors findings argue for greater awareness of sleep disorders and associated impacts on daytime function in public transport drivers.
- 21 Jan 2021Current Practices in the Use of Onboard Technologies to Avoid Transit Bus Incidents and Accidents (TCRP Synthesis of Transit Practice)
- 21 Jan 2021Characteristics and Elements of Non-Punitive Employee Safety Reporting Systems for Public Transportation (TCRP Research Report)
- 21 Jan 2021FTA Annual Report on Public Transportation Innovation Research Projects for Fiscal Year 2020 (Report 0181)
- 21 Jan 2021FTA Standards Development Program: Crashworthiness/Crash Energy Management Follow-up for Less than 30 Ft Bus (Report 0141)
- 21 Jan 2021FTA Standards Development Program: Crashworthiness/Crash Energy Management for Transit Bus (Report 0179)