Related Experiment Videos
Exposure-response relations for self reported asthma and rhinitis in bakers
J Brisman1, B Järvholm, L Lillienberg
1Occupational Medicine, Department of Internal Medicine, Sahlgrenska University Hospital, Göteborg, Sweden. jonas.brisman@ymk.gu.se
Occupational and Environmental Medicine
|April 19, 2000
Summary
Bakers exposed to inhalable flour dust face increased risks of asthma and rhinitis. Higher dust concentrations at disease onset correlated with higher incidence rates, particularly for asthma at levels above 3 mg/m³.
Area of Science:
- Occupational Health
- Epidemiology
- Environmental Health
Background:
- Bakers are exposed to inhalable flour dust, a known respiratory irritant.
- Previous studies suggest a link between occupational dust exposure and respiratory diseases in bakers.
Purpose of the Study:
- To investigate the relationship between two measures of inhalable flour dust exposure and the incidence rates of asthma and rhinitis in bakers.
- To determine if current dust concentration or cumulative dust exposure is a stronger predictor of respiratory disease risk.
Main Methods:
- Retrospective cohort study of 2923 bakers.
- Exposure assessment using job-task-based dust measurements and questionnaires.
- Multiple Poisson regression analysis to evaluate the impact of exposure estimates on disease incidence rates.
Main Results:
- Incidence rates of asthma and rhinitis increased with higher dust concentrations at disease onset.
- Significant association found between current dust concentration and risk of asthma/rhinitis, but not cumulative exposure.
- Highest asthma incidence observed in dough makers (7.3/1000 person-years in men, 6.5 in women).
Conclusions:
- Asthma risk increased at inhalable dust concentrations ≥3 mg/m³ (e.g., dough making).
- Rhinitis risk increased at all measured concentrations (≥1 mg/m³), indicating risk across most bakery tasks.
- Respiratory risks appear more dependent on current inhalable dust concentration than cumulative exposure.