|Molecular Weight of Agent||Both|
|Occupation|| Not specified|
|Activity Intervention|| Cessation of exposure|
|Participation Rate||A review article including 39 papers|
|Intervention Effectiveness||1. A total of 25 and 4 papers were related to occupational asthma induced by only low-molecular-weight (LMW) and high-molecular-weight (HMW) allergens, respectively.
2. The reported rate of complete symptomatic recovery from asthma varied from 0% to 100%, with a pooled prevalence of 32% (95%CI, 26% to 38%).
3. Pooled estimates of recovery were lower with increasing age (p=0.019) and among clinic based populations (p=0.053).
4. Patients with the shortest durations of exposure (<=76 months) had the highest rate of recovery.
5. The pooled prevalence of persistent non-specific bronchial hyper-responsiveness (NSBHR) was 73% (95% CI, 66% to 79%)
6.Patients who had asthma induced by LMW were less likely to have persistent NSBHR (P=0.006)