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Gholamreza Bordbar, Majid Nedjatiyan,
Volume 3, Issue 1 (5-2009)

The main objective of this research is to obtain some basic information about the relationship between sleepiness and accidents. It also aims to quantify the effects of personal characteristics and exposure variables on the probability of falling asleep at the wheel. The population of the study is all the male car drivers in the city of Mashhad between 30/11/87 till 30/8/88 of those who have passed at least three years of the time they got their driver’s license on this period. The number of samples is 400 car drivers, by simple random sampling method and Data collected by using questionnaire. Analysis of the data by using analysis of variance (ANOVA) and correlation test (Pierson) showed that there is a significant relationship between sleeping probability and exposure variables. These variables indirectly express the level of sleepiness of an individual, as a factor in risky driving. The finding of the final results showed that sleepiness is an important factor of many accidents for some drivers. The rule of company car drivers in accidents are very clear and obvious and also, the probability of feeling close to falling asleep at the wheel of this group is high, and consequently the accident frequency rate of them is higher than the others.

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