Asthma Among Manitoba Workers: Results from the Manitoba
Occupational Disease Surveillance System
Dublin Core
Title
Asthma Among Manitoba Workers: Results from the Manitoba
Occupational Disease Surveillance System
Occupational Disease Surveillance System
Subject
Cohort
Compensation claims
Occupational asthma
Surveillance
Compensation claims
Occupational asthma
Surveillance
Description
This study characterized the risk of new-onset asthma among workers in Manitoba, Canada.
Methods: Accepted time loss claims from the Workers’ Compensation Board of Manitoba from 2006 to
2019, containing workers’ occupations and industries, were linked with administrative health data from
1996 to 2020. After restricting the cohort to the first claim per person in an occupation and applying age
and coverage exclusions, the cohort comprised 142,588 personeoccupation combinations. Asthma cases
were identified if workers had at least two medical records for asthma (International Classification of
Diseases, Ninth Revision, 493) within a 12-month period, within the 2 years before 3 years after cohort
entry. New-onset asthma was identified using a 3-year washout period. Asthma hazard ratios by occupation and industry were estimated using Cox proportional hazard models, adjusted for age, and
stratified by sex.
Results: Increased asthma risk was observed among workers with known asthmagen exposure, including
male veterinary and animal health technologists and technicians (hazard ratio 3.97, 95% CI 1.78e8.86),
male fish processing workers (3.40, 1.53e7.57), and male machining tool operators (2.91, 1.72e4.92).
Increases were also observed for occupations with unknown or suspected allergens, including gas station
attendants, drivers, mail/postal and related workers, public works and maintenance laborers, mine laborers and crane operators, and some indoor worker groups. Decreased risks were observed among
nurses and residential and commercial installer and servicers.
Conclusion: This database linkage study successfully identified occupations and industries with known
sensitizing agents or irritants, and several occupation and industries not typically associated with workrelated asthma, warranting further investigation
Methods: Accepted time loss claims from the Workers’ Compensation Board of Manitoba from 2006 to
2019, containing workers’ occupations and industries, were linked with administrative health data from
1996 to 2020. After restricting the cohort to the first claim per person in an occupation and applying age
and coverage exclusions, the cohort comprised 142,588 personeoccupation combinations. Asthma cases
were identified if workers had at least two medical records for asthma (International Classification of
Diseases, Ninth Revision, 493) within a 12-month period, within the 2 years before 3 years after cohort
entry. New-onset asthma was identified using a 3-year washout period. Asthma hazard ratios by occupation and industry were estimated using Cox proportional hazard models, adjusted for age, and
stratified by sex.
Results: Increased asthma risk was observed among workers with known asthmagen exposure, including
male veterinary and animal health technologists and technicians (hazard ratio 3.97, 95% CI 1.78e8.86),
male fish processing workers (3.40, 1.53e7.57), and male machining tool operators (2.91, 1.72e4.92).
Increases were also observed for occupations with unknown or suspected allergens, including gas station
attendants, drivers, mail/postal and related workers, public works and maintenance laborers, mine laborers and crane operators, and some indoor worker groups. Decreased risks were observed among
nurses and residential and commercial installer and servicers.
Conclusion: This database linkage study successfully identified occupations and industries with known
sensitizing agents or irritants, and several occupation and industries not typically associated with workrelated asthma, warranting further investigation
Creator
Elizabeth Rydz 1,2
, Randy Walld 3
, Mieke W. Koehoorn 1,4
, Christopher B. McLeod 1,4
,
Paul A. Demers 5,6
, Cheryl E. Peters 1,2,7,8,*, Allen Kraut 9,10
, Randy Walld 3
, Mieke W. Koehoorn 1,4
, Christopher B. McLeod 1,4
,
Paul A. Demers 5,6
, Cheryl E. Peters 1,2,7,8,*, Allen Kraut 9,10
Source
https://pdf.sciencedirectassets.com/287282/1-s2.0-S2093791124X00050/1-s2.0-S2093791124000544/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEFMaCXVzLWVhc3QtMSJGMEQCIBi4ZpoAP4%2BPKF0qklBjTnsdxOo7frDUmeOLy7mgC3ENAiAl6nLiWo2NLGFt7F%2FMyYiZpj4aU2GyM5sUNUwi%2FUP%2BFyqzBQgbEAUaDDA1OTAwMzU0Njg2NSIMSNkugly4NAAd%2FHKXKpAFDIRG4L3MUsVxpbHdudgOtEUd56kkmZ2n76wcRIch4YyQ7P4O41Rn7XIBlq%2BnkT%2FCgjHGYmNsSpZWMb5Jz2%2FasYNZ3uwKol%2BmAxJLouLJ4FWrZgs%2BtRnkzR%2F%2BrdwN1h0bCF5qZd%2BMkEluQlNVwPcLhevizoyDSC9XidbQvfUCWLiGo%2B9rOue0KEn%2FIStsM0q41%2BetcKb9o86742KiWmNA4nP%2Bt%2B%2BbDFtDaRHbuwV9IL3WAmzBJSkYQ7XBSujWJD62twt6b4ho4ySxfo6fr%2F8Ui6F3LjdL%2Faey2yxI6ml%2BHRr2i8MMBG9cFZKY8ZYIQ2p4iAX%2FV2N4WgP8O8t6erUPCkikHTH33Grh7E%2BvoQwCwl7C8e5xHt%2FAzoikYcv5YosprUEkaN2wLA%2FiAblZmQ4JxugNYAHPMMktHs7C06xCCfyY%2FqkVuUWk86wJa2J688wkxIXkLua7fu8erlylgU5Hf1%2BrrDPK4fYBD5%2BEh4rwjKPkW7XiF%2FBwK6cj6JnnAbsmDyKoWyRyIKvtIB1%2B3FMuAWlvdVdr3cFF%2BW165ISPygtJ9XGQkASAbaRTH%2FJS3TapaSbi9%2B2J8dEN%2BvoV1nOtRx1mGKqr7UDEywssqVNNSJXsKfOZaSk5V50%2Fl0ztOcniKKlfBge7jSAHrHADaJmnDxEsIVxfz16gMDsvG0eqxT4G6UB3VpILQ41%2FWZWkgY%2BekQ8NNMQHLExeC83Sopahw0MufToDSWCdN0fk5IbxzL1RIFuU3iKsjy3hFf%2FnH4RUvIc46AgvQqTaUqPr6Jb%2BTLMI26sYAv0D2DCarhY3MX78jYcWAqLLtcyjZpriUWGytAyqVwsGxNm0gmnRX1l8rgatZfw1YAWllgFv9ooOnicwgtb%2BzAY6sgGxGB4SMQ8Ctyh2U3jCkydumRTQGyyKKu0gul6LV3FpCIIi0lCwCen7kIXBk3%2Bp73Sm49bOFrnYLZx92wY8Mij01K8rCIhi0FBCn%2FWxhya4JbZZRHI9XP1zNCG6KZE9SgHrLzv%2BPl23JdPx5IsUCBosG%2Fbo86fyQh%2B50qNjOyzsnExB4Ed5ZivHVhpf%2FCgGYfUYRXM9KjNF%2Bym%2Fy077yUdcJi2Ua3LnbnytbsAUEnL5HjZD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260226T031027Z&X-Amz-SignedHeaders=host&X-Amz-Expires=300&X-Amz-Credential=ASIAQ3PHCVTYZLW73ZMH%2F20260226%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=12388f7eb9e7f7c5050d82f7e75e5b18ee13164ee8cea025aa95f82d4dfbe9d6&hash=9429b315e0e68e05af1a353bf8ab1c834ff359e96c579d99038a918ba032fb9e&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&pii=S2093791124000544&tid=spdf-a378cabd-714f-4bc7-ac7e-7ef2c9c21361&sid=830681cc5d60f646526bf61913cd5206d1e8gxrqb&type=client&tsoh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&rh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&ua=0b015e065401520104&rr=9d3c3fdc5c6a0d3d&cc=id
Publisher
1 School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
2Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
3 Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada
4 Partnership for Work, Health, and Safety, University of British Columbia, Vancouver, BC, Canada
5Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada
6Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
7 BC Centre for Disease Control, Vancouver, BC, Canada
8 BC Cancer, Vancouver, BC, Canada
9Department of Internal Medicine, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
10Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
2Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
3 Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada
4 Partnership for Work, Health, and Safety, University of British Columbia, Vancouver, BC, Canada
5Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada
6Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
7 BC Centre for Disease Control, Vancouver, BC, Canada
8 BC Cancer, Vancouver, BC, Canada
9Department of Internal Medicine, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
10Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
Date
5 August 2024
Contributor
FAJAR BAGUS W
Format
PDF
Language
ENGLISH
Type
TEXT
Files
Citation
Elizabeth Rydz 1,2
, Randy Walld 3
, Mieke W. Koehoorn 1,4
, Christopher B. McLeod 1,4
,
Paul A. Demers 5,6
, Cheryl E. Peters 1,2,7,8,*, Allen Kraut 9,10, “Asthma Among Manitoba Workers: Results from the Manitoba
Occupational Disease Surveillance System,” Repository Horizon University Indonesia, accessed April 11, 2026, https://repository.horizon.ac.id/items/show/11786.
Occupational Disease Surveillance System,” Repository Horizon University Indonesia, accessed April 11, 2026, https://repository.horizon.ac.id/items/show/11786.