Prevention of Work-related Asthma: Study Search Results

Study Details

Prevention Level	Secondary
Author	Lin
Study Year	1996
Country	Canada
Molecular Weight of Agent	LMW
Category	Wood dust or bark
Agent	Western red cedar
Occupation	Western red cedar workers (Includes cohort reported by Chan-Yeung, 1987 and Cote, 1990)
Outcome/Diagnosis	Occupational 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 Rate	201 of 280 eligible subjects (Participation rate: 72%)
Intervention Effectiveness	Subjects 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.