Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 2 1 2010 06 15 25 29 Mohsen Zare Department of Occupational Health, School of Health, Shaheed Sadoughi University of Medical Sciences, Yazd, Iran. Gholam Hossein Halvani Department of Occupational Health, School of Health, Shaheed Sadoughi University of Medical Sciences, Yazd, Iran. Abolfazl Barkhordari Department of Occupational Health, School of Health, Shaheed Sadoughi University of Medical Sciences, Yazd, Iran. Asghar Zare Department of Biostatistics, School of Health, Shaheed Sadoughi University of Medical Sciences, Yazd, Iran. 2015 10 04 Prevalence of chronic disease could be adversely having an effect on the capability of the driver. In addition, it must increase probability of accidents. The aim of this study was to examine the relationship between chronic medical conditions and contribution in crashes among drivers. In this cross-sectional study, the populations were professional truck drivers. The numbers of 323 people were selected to participate in the study. All of information for this survey was gathered by self-repot questionnaire. Analyses were performed by binary Logistic Regression, Cochran's and Mantel-Haenszel statistics and chi-square test. There was not a significant relationship between drivers who reported that they had heart disease and involved in crashes with divers without cardiovascular disorders involved in accidents. Drivers involved in crashes were further possible to have diabetes mellitus and respiratory disorders compared with drivers not involved in crashes. There was a significant relationship between vision complaint and driving accidents (p<0.05). The present study indicates that, several medical conditions were associated with the risk of crashes. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/13 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/13/13