Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 10 1 2018 02 06 7 11 EN MOHSEN KOOSHA Neurosurgery resident, Shahid Beheshti University of Medical Sciences, Imam-Hussein Hospital, Tehran, Iran. MASHHOOD AGHAJANLOO Assistant professor, Hamedan University of Medical Sciences, Hamedan, Iran. SEPIDEH PAYBAST Neurology resident, Shahid Beheshti University of Medical Sciences, Imam-Hussein Hospital, Tehran, Iran. MOHAMMAD RAHIMINEJAD General Practitioner, Larestan University of Medical Sciences, Imam-Reza Hospital, Fars, Iran. AHMAD SOLTANZADEH Assisstant Professor; Occupational Hygiene Engineering; School of Public Health; Qom University of Medical Sciences, Qom, Iran 2017 07 22 2018 01 02 ORIGINAL ARTICLE   Low back pain (LBP) due to lumbar disk herniation could collaborate with various risk factors. In this study, we focused on analysis of lumbar disk herniation risk factors in patients with LBP. This comparative cross-sectional study was conducted in Hamedan-western Iran in 2014-2015. Overall, 58 cases with evidence of lumbar disk hernia were classified as a case group and 47 cases without evidence of lumbar disk herniation were classified as a control group. The data collection was performed by using a questionnaire and the statistical analysis was performed by using SPSS software. The analytic results indicated a meaningful correlation between demographic variables as body mass index (BMI) mean, occupation type and lumbar disk hernia (P<0.05). Furthermore, the abdominal circumference and the average heavy load carried by the participants throughout a day had a significant relationship with lumbar disk herniation (P<0.05). There are multiple risk factors for lumbar disk hernia regarding a combination of genetics and acquired characteristics and lifestyle. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/303 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/303/412