• Philip D Somervell and George A Conway.
• Epidemiologist Alaska Pacific Regional Office, National Institute for Occupational Safety and Health, Anchorage, Alaska 99508, USA. gjx7@cdc.gov
• Am. J. Ind. Med. 2011 Jun 1; 54 (6): 461-6.

BackgroundCongress has exempted farms with fewer than 11 employees from enforcement of the Occupational Safety and Health Act. Three states (California, Oregon, and Washington) do not observe the exemption.MethodsWe compared rates of fatal occupational injury in agriculture, by year, in 1993-2007, in California, Oregon, and Washington (aggregated), and the remaining states (as two aggregated groups): those with, and those without, state-designed occupational safety and health programs.ResultsFatality rates were approximately 1.6 to 3 times as high in both groups of states observing the small farm exemption as in the group of three states not observing it. Comparisons excluding the agriculture industry showed weaker differences.ConclusionsThe three states' opting out of the small farm exemption may have had substantial direct effects. They may also reflect and/or encourage a generally more effective approach to occupational health and safety. Although alternative explanations must be considered, the stakes are high in terms of injury and loss of life; further investigation seems urgently indicated.Copyright © 2011 Wiley-Liss, Inc.

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