Prevention of Work-related Asthma: Study Search

Prevention LevelSecondary
AuthorLin
Study Year1996
CountryCanada
Molecular Weight of AgentLMW
Agent CategoryWood dust or bark
Specific AgentWestern red cedar
Occupation Western red cedar workers (Includes cohort reported by Chan-Yeung, 1987 and Cote, 1990)
Outcome/DiagnosisOccupational asthma
Activity Intervention Removal from exposure (FU mean: 5.3 yrs - unexposed workers; FU mean: 6.9 yrs - exposed workers; FU mean: 4.0 yrs - controls)
Participation Rate201 of 280 eligible subjects (Participation rate: 72%)
Intervention EffectivenessSubjects who continued to be exposed (n=158) had a more rapid decline in FEV1 (-26 ml/yr, p=0.09) than controls (saw mill workers, n=399). Subjects who were removed from exposure after diagnosis (n=122) showed a similar rate of decline in FEV1 (-3 ml/yr, p=0.86) compared to controls.
Page last reviewed: February 20, 2020