Prevention of Work-related Asthma: Study Search

Prevention LevelSecondary
AuthorChan-Yeung
Study Year1987
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, 1982)
Outcome/DiagnosisOccupational asthma
Activity Intervention Removal from exposure (mean: 4 years)
Participation Rate218 of 232 eligible subjects (Participation rate: 94%)
Intervention EffectivenessCompared to subjects still symptomatic (n=79), subjects who left industry asymptomatic at follow-up (n=50) were more likely to have shorter duration of exposure before onset of symptoms (p<0.05) and shorter duration of symptoms before diagnosis (p<0.05). Subjects remaining on job (n=89) continued to experience symptoms.
Page last reviewed: February 20, 2020