Secondary |
Talini D |
2013 |
Italy |
LMW |
Diisocyanates |
Toluene diisocyanate (TDI) |
N/A |
Occupational asthma |
Removal from exposure and reduction in exposure (average follow-up of 11± 3.6 years). |
Forty-six occupational asthma patients participated in the follow-up (participation rate: 56.8%). |
At the time of follow-up, of the 46 subjects, 32 subjects had been removed from exposure for 6.0 ± 6.9 years, and 14 subjects continued to work with reduced exposure to TDI.
1. For all subjects:
a. There was a significant improvement in FEV1 (% Predicted, p<0.05) and the provocative dose of methacholine producing a 20% fall in FEV1 (PD20FEV1) (p<0.01).
b. A shorter duration of symptoms before diagnosis was a significant predictor of improvement in PD20FEV1.
2. For 32 subjects removed from exposure:
a. The prevalence of the asthma-like symptoms of attacks of shortness of breath, wheeze, and dyspnoea was significantly reduced with p<0.001, p=0.03, and p=0.04, respectively;
b. There was a significant improvement in FEV1 and PD20FEV1 only in the group with a higher FEV1 at diagnosis. |