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Factors Associated With Fatal Mining Injuries Among Contractors and Operators

Muzaffar, Saeher MD, MSt, MPH; Cummings, Kristin MD, MPH; Hobbs, Gerald PhD; Allison, Paul PhD; Kreiss, Kathleen MD

Journal of Occupational and Environmental Medicine: November 2013 - Volume 55 - Issue 11 - p 1337–1344
doi: 10.1097/JOM.0b013e3182a2a5a2
Original Articles

Objective: To explore factors associated with fatal accidents among contractors and operators by using the Mine Safety and Health Administration database.

Methods: Cross-sectional data on 157,410 miners employed by operators or contractors during 1998–2007 were analyzed using logistic regression and multiple imputation.

Results: Univariate odds of fatal versus nonfatal accident were 2.8 (95% confidence interval, 2.3 to 3.4) times higher for contractors than operators. In a multivariable model, fatality was associated with contractor, less experience at the current mine, and occurrence at more than 8 hours into the workday (P < 0.05 for each). Differences in odds of fatality by employment type were more pronounced in surface mines.

Conclusions: Contractors had a higher proportion of fatal injuries. Fatality also varied by mine experience, the number of hours worked before injury, work location, and mine type.

From the Division of Pulmonary, Allergy, and Critical Care Medicine (Dr Muzaffar) and Department of Sociology (Dr Allison), University of Pennsylvania, Philadelphia; National Institute for Occupational Safety and Health (Drs Cummings and Kreiss), Morgantown; and Department of Statistics (Dr Hobbs), West Virginia University, Morgantown.

Address correspondence to: Saeher Muzaffar, MD, MSt, MPH, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pennsylvania, Philadelphia, PA 19104 (

Dr Muzaffar was supported by the National Institute for Occupational Safety and Health training grant T42 OH008416-04 while conducting this research.

The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the National Institute for Occupational Safety and Health.

Copyright © 2013 by the American College of Occupational and Environmental Medicine