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Work-related asthma: Number of cases by classification and state, 2009–2012

ClassificationCaliforniaMassachusettsMichiganNew YorkTotal
NumberPercentNumberPercentNumberPercentNumberPercentNumberPercent
Work-aggravated asthma1 388 15.7 66 41.5 113 32.3 335 42.6 902 23.9
New-onset asthma2 350 14.1 83 52.2 230 65.7 194 24.7 857 22.7
Reactive airways dysfunction syndrome 97 3.9 2 1.3 37 10.6 31 3.9 167 4.4
Occupational asthma 253 10.2 81 50.9 193 55.1 163 20.7 690 18.3
Known asthma inducer3 40 1.6 24 15.1 74 21.1 31 3.9 169 4.5
Unknown asthma inducer 213 8.6 57 35.8 119 34.0 132 16.8 521 13.8
Confirmed, but unclassified4 1,740 70.2 10 6.3 7 2.0 258 32.8 2,015 53.4
TOTAL 2,478 100.0 159 100.0 350 100.0 787 100.0 3,774 100.0

1 Pre-existing asthma aggravated by exposure or condition at work.
2 Asthma induced by workplace exposures. 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 more information.

Source:

Sentinel surveillance data as of June 2017, reported by R. Harrison, J. Flattery, J. Weinberg (California); L. Davis, E. Pechter, and K. Fitzsimmons (Massachusetts); K. Rosenman, MJ. Reilly, and B. Pickelman (Michigan); and K. Gelberg and K. Cummings (New York).

Citation:

NIOSH 2017. Work-Related Lung Disease Surveillance System (eWoRLD). 2017-924 U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV. Available at: <https://wwwn.cdc.gov/eworld/Data/924> September 26, 2017.

Reference Number: 2017-924

Date Posted: July 2017

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