Thiese, Matthew S.Moffitt, GaryHanowski, Richard J.Kales, StefanosPorter, Richard J.Hegmann, Kurt T.2015-08-032015Thiese, Matthew S., Gary Moffitt, Richard J. Hanowski, Stefanos N. Kales, Richard J. Porter, and Kurt T. Hegmann. 2015. “Commercial Driver Medical Examinations: Prevalence of Obesity, Comorbidities, and Certification Outcomes.” Journal of Occupational and Environmental Medicine 57 (6): 659-665. doi:10.1097/JOM.0000000000000422. http://dx.doi.org/10.1097/JOM.0000000000000422.1076-2752http://nrs.harvard.edu/urn-3:HUL.InstRepos:17820671Objective: The objective of this study was to assess relationships between body mass index (BMI) and comorbid conditions within a large sample of truck drivers. Methods: Commercial driver medical examination data from 88,246 commercial drivers between 2005 and 2012 were analyzed for associations between BMI, medical disorders, and driver certification. Results: Most drivers were obese (53.3%, BMI >30.0 kg/m2) and morbidly obese (26.6%, BMI >35.0 kg/m2), higher than prior reports. Obese drivers were less likely to be certified for 2 years and more likely to report heart disease, hypertension, diabetes mellitus, nervous disorders, sleep disorders, and chronic low back pain (all P < 0.0001). There are relationships between multiple potentially disqualifying conditions and increasing obesity (P < 0.0001). Morbid obesity prevalence increased 8.9% and prevalence of three or more multiple conditions increased fourfold between 2005 and 2012. Conclusions: Obesity is related to multiple medical factors as well as increasing numbers of conditions that limit driving certification.en-USJournal Article2015-08-0310.1097/JOM.0000000000000422