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Work-related asthma: Number of cases by classification and state, 1993–2008

ClassificationCaliforniaMassachusettsMichiganNew JerseyTotal
NumberPercentNumberPercentNumberPercentNumberPercentNumberPercent
Work-aggravated asthma1 1,076 23.2 121 15.4    370 15.8   87 18.5 1,654 20.1
New-onset asthma2 1,341 28.9 604 76.7 1,968 84.1 317 67.3 4,230 51.3
Reactive airways dysfunction syndrome    171   3.7   87 11.1    288 12.3   63 13.4    609   7.4
Occupational asthma 1,170 25.2 517 65.7 1,680 71.8 254 53.9 3,621 43.9
Known asthma inducer3    218   4.7 186 23.6    722 30.8   84 17.8 1,210 14.7
Unknown asthma inducer    952 20.5 331 42.1    958 40.9 170 36.1 2,411 29.3
Confirmed, but unclassified4 2,223 47.9   62   7.9       3   0.1   67 14.2 2,355 28.6
TOTAL 4,640 100.0  787 100.0  2,341 100.0  471 100.0  8,239 100.0 

1 Pre-existing asthma aggravated by exposure or condition at work.
2 Includes cases of reactive airways dysfunction syndrome and occupational asthma.
3 Known asthma inducers, defined by medical literature review, are designated in the Association of Occupational and Environmental Clinics (AOEC) exposure coding scheme (http://www.aoec.org/tools.htm).
4 Confirmed, but unclassified cases are confirmed work-related asthma cases that lack the necessary information to determine if they are new-onset asthma or work-aggravated asthma.

Note:

Percentages may not sum to 100% due to rounding.

See Appendix for information about data sources and methods.

Source:

Provisional sentinel  surveillance data as of January 2012, reported by R. Harrison, J. Flattery, and J. Weinberg (California); L. Davis, E. Pechter, and K. Fitzsimmons (Massachusetts); K. Rosenman, MJ. Reilly, and M. Yoder (Michigan); and M. Lumia and A. Stephens (New Jersey).

Reference Number: 2014AT09-03

Date Posted: September 2014

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