The Impacts of Heat Stress on the Cognitive Performance Parameters of Taxi Drivers

Abstract

Aim: Cognitive function factors have been reported as an effective factor in the incidence of traffic accidents. The aim of this study was to investigate the effect of heat stress on the cognitive performance parameters of taxi drivers. Materials and Methods: This prospective cohort study was performed on 29 taxi drivers in both winter and summer. The parameters studied in this study were precision, speed of work, attention, short-term auditory memory, concentration skills, mental fatigue, the wet bulb glob temperature index, and the thermal comfort parameters. Results: The mean and standard deviation of drivers age was 52.24 ± 8.28 years. People's performance in terms of speed, precision, number of errors, and attention in the summer morning shift was better than the winter evening shift, but these parameters dropped sharply in the evening shift in the summer. There was a statitistically significant difference between these parameters in the morning and evening of summer (P < 0.05). Conclusion: The results of this study showed that heat stress reduces the precision, speed of work and attention and increases the number of errors and mental fatigue of drivers. Therefore, it is necessary to plan to improve the working conditions of drivers to prevent the reduction of drivers' cognitive performance and improve driving conditions.

Keywords

• cognitive function
• heat stress
• taxi drivers
• wet bulb glob temperature index