Abstract

Tank truck drivers are a group of workers who play an important role in the distribution process of fuel oil. To ensure the 24-hour availability of fuel, the drivers work by shift working system, consequently a high risk of accidents due to fatigue affected by sleep aspect because of the disruption of circadian rhythms. This study aimed to find out more about the quality and quantity of sleep and its relationship with fatigue among PT X drivers. The cross-sectional study design used an objective instrument in the form of a Fitbit smartwatch to measure the quality and quantity of sleep in 10 tank truck drivers; and the subjective instrument was in the form of questionnaires (IFRC, PSQI, SHI, KSS, and others) to 220 tank truck drivers. The study results showed a poor sleep quality at the REM stage (< 20%) and an average quantity of sleep < 7 hours. The sleep quantity of shift-1 respondents was shorter than the shift 2, and the sleep quantity in the working day was shorter than in the day off. Chi-square test results showed a significant relationship of sleep quality, bed environment, habits before bedtime, work environment, and health status with fatigue status. In conclusion, the quality and quantity of the driver’s sleep do not meet standards; and they are a group of workers at risk of suffering from fatigue due to sleepiness.

Keywords: Fitbit; IFRC; Quantity and Quality of Sleep; Fatigue; Tank Truck Drivers