Commercial drivers could be understating sleep apnoea symptoms for fear of losing their licence!
News Release: ERS Annual Congress 2012: Vienna, Austria
Commercial drivers could be understating sleep apnoea symptoms for fear
of losing their licence !
Vienna, Austria: People who drive commercial vehicles, such as buses, taxis, trucks and aeroplanes, could be incorrectly reporting their symptoms of sleep apnoea due to their fears of endangering their employment, according to a new study.
The research will be presented today (1 September 2012) at the European Respiratory Society’s Annual Congress in Vienna.
People with the condition suffer frequent disruptions to their breathing during sleep, leaving them with headaches, drowsiness and sometimes depression during the day.
Obstructive sleep apnoea is a well-established risk for traffic accidents and commercial vehicle drivers could lose their licence if their illness is perceived to be affecting safety while driving.
The regular treatment for sleep apnoea is continuous positive airway pressure (CPAP), which uses a mask and other equipment to generate a stream of air to keep the upper airway open during sleep. As commercial drivers regularly do shift work, they don’t follow regular patterns of sleep and also do not always sleep in one place. This makes adherence to CPAP treatment more difficult for them.
Researchers examined 37 commercial vehicle drivers with sleep apnoea and compared them to a control group of 74 patients. Both groups had similar characteristics of age, body mass index (BMI) and similar numbers of disturbances suffered on average during the night. Both groups also underwent treatment using CPAP.
The researchers then analysed levels of sleepiness using the Epworth Sleepiness Score – a well-established short questionnaire used to give levels of sleepiness during the day time.
At the start of the study, commercial drivers reported a median score of 5.4 on the sleepiness scale, compared a median of 6.8 reported by non-commercial drivers, despite a similar number of disturbances at night between the two groups. The difference was also seen after 6-months treatment using CPAP therapy with the drivers reporting an average sleepiness score of 3.15 and non-drivers reporting an average of 4.95.
The results also showed that drivers received less treatment (only receiving CPAP for a median of 44% of days, compared to 50.5%) and also had more unscheduled visits to the clinic, which suggests they were struggling with their symptoms.
The authors speculate that the lower scores reported by the commercial drivers could be due to drivers under-scoring their sleepiness levels for fear of losing their licence permissions.
Lead author, Dr. Werner Strobel from University Hospital, Switzerland, said: “Our study suggests that commercial drivers are playing down their levels of sleepiness for fear of losing their jobs. Although this is very difficult to prove, both the group of drivers and the group of non-drivers began the study with a similar number of disturbances during the night. You would therefore expect their reports of sleepiness to be similar to begin with, however the drivers estimated their levels of sleepiness as lower than the non-drivers. This pattern continued throughout the course of the study, with drivers reporting lower symptoms, yet receiving less treatment and making more unscheduled visits to the clinic.
“We can assume from these results that
commercial drivers with sleep apnoea symptoms could be under-reporting
their sleepiness in order to protect their job. These results should be
taken into account by healthcare professionals who are treating this
group of people.”
Notes to editors:
· Abstract: Differences between commercial vehicle drivers and other patients in symptoms of obstructive sleep apnoea and response to CPAP therapy
· Session: 77
· Date and time: Sunday, 2 September, 10:45-12:45
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