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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: J Occup Environ Med. 2017 Dec;59(Suppl 12):S22–S27. doi: 10.1097/JOM.0000000000000890

TABLE 1.

Incidence Rates for TDI-Induced Asthma, TDI-Induced Asthma or Asthma Indeterminate Regarding Work-Relatedness, FEV1 Decline, and Respiratory Symptoms

Health Outcomes
for 197 Workers		 Cases Incidence Rate (95% CI)
(Cases/Person-years)
TDI-induced asthma 7 0.009 (0.002–0.016)a
TDI-induced asthma or asthma indeterminate regarding work-relatedness 9 0.012 (0.004–0.020)b
FEV1 decline of 350 mL or 10% or more 19 0.026 (0.014–0.037)c
Respiratory symptoms qualifying for clinical examination for possible work-related asthma 23 0.030 (0.018–0.042)d
a

765.2 person-years.

b

762.7 person-years.

c

743.4 person-years.

d

755.4 person-years.

CI, confidence interval; FEV1, forced expiratory volume in one second; TDI, toluene diisocyanate.