During 1992-2002, a total of 31 occupational injury deaths were attributable
to mobile chippers. All decedents were male; mean age at death was 35 years
(range: <20-60 years). Of these deaths, 12 (39%) occurred among persons
aged 25-34 years. Seventeen (55%) occurred in the agriculture, forestry, and
fishing industry, and seven (23%) occurred in the manufacturing industry.
Twenty-one (68%) were the result of being caught or compressed by the chipper,
and nine (29%) were the result of being struck by the machine or a machine
part. Thirteen (42%) of the fatally injured workers were groundskeepers, and
five (16%) were machine operators, assemblers, and inspectors. The remaining
were classified as managers, forest conservation specialists, farm workers,
carpenters, cutters/welders, miscellaneous machine operators, and construction
and nonconstruction laborers. Approximately one third of the events occurred
in July or August. Of 26 cases among persons for whom ethnicity was known,
seven (27%) were among Hispanics. Societal costs of all chipper-related fatalities
(primary source code 3231) for 1992-2001 are estimated at $28.5 million in
2003 dollars (CDC, unpublished data, 2004‡).