This study was a follow-up with patients diagnosed in B.C. with Western Red Cedar (WRC) Asthma, since 1972. The researchers examined the long-term impacts of exposure to WRC, aiming to provide some insight into the effectiveness of protective measures, such as respirators.

The researchers examined the respiratory health and quality of life of B.C. workers diagnosed with Western red cedar asthma (WRCA) since 1972. Information about work history, current employment, exposure status, respiratory symptoms, and overall quality of life were gathered through telephone interviews. Findings indicate that WRCA can impact quality of life as well as respiratory health. The most favourable outcomes were experienced by individuals who continued working after diagnosis, particularly when this work did not involve further WRC exposure.