What is the impact of occupational asthma on employment?

The following references have been associated with this question by users of this website. They do not form part of the BOHRF occupational asthma guidelines.

burgeps	Bradshaw 2007
burgeps	Yacoub 2007	A follow-up of 40 workers with occupational asthma 2 years after diagnosis showed 8 (20%) had been successfully relocated away from exposure by their original employer and 13 (32.5%) were working for a different employer. 7 (17.5%) were retired prematurely, 7 were unemployed or doing part-time work and 5 (12.5%) were being retrained.
burgeps	Ayres 2011