Departamento de Fisiología, Universidad Austral, Buenos Aires, Argentina.
J Occup Environ Med. 2011 Jul;53(7):806-11. doi: 10.1097/JOM.0b013e318221c6de.
To evaluate sleep, alertness, salivary cortisol levels, and autonomic activity in the afternoon and morning shifts of a sample of short-distance bus drivers.
A sample of 47 bus drivers was evaluated. Data regarding subjects and working characteristics, alertness (psychomotor vigilance task), sleep habits (Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale, Actigraphy), endocrine stress response (salivary cortisol), and autonomic activity (heart-rate variability) were collected.
Sleep restriction was highly prevalent. Drivers in the morning shift slept 1 hour less than those in the afternoon shift, showed lower reaction time performance, a flattening of cortisol morning-evening difference, and higher overweight prevalence.
The differences found between morning and afternoon shifts point out to the need of the implementation of educational strategies to compensate the sleep loss associated with an early work schedule.
评估短距离巴士司机样本在下午和上午班次中的睡眠、警觉性、唾液皮质醇水平和自主活动。
评估了 47 名巴士司机样本。收集了有关受试者和工作特征、警觉性（精神运动 vigilance 任务）、睡眠习惯（匹兹堡睡眠质量指数、嗜睡量表、活动记录仪）、内分泌应激反应（唾液皮质醇）和自主活动（心率变异性）的数据。
睡眠限制非常普遍。上午班的司机比下午班的司机少睡 1 小时，反应时间表现更差，皮质醇晨夕差变平，超重患病率更高。
上午和下午班次之间的差异表明需要实施教育策略来弥补与早班工作相关的睡眠损失。
