Reference

Allard C, Cartier A, Ghezzo H, Malo JL, Occupational asthma due to various agents: Absence of clinical and functional improvement at an interval of four or more years after cessation of exposure, Chest, 1989;96:1046-1049,

BOHRF Original Authors' Main Conclusions

The original authors' main conclusions are taken from Abstract, Results and Discussion. They are decided upon by the authors of the BOHRF occupational asthma guidelines and form part of the guidelines.

Follow up assessments made on average 2.3 years and 5.8 years after removal from the workplace, with mean duration of exposure before symptoms 6.3 months. Authors conclude that except for 3 subjects, all were still symptomatic at both follow ups and even after > 4 years, the need for medication did not diminish, nor did airway obstruction and hyper-responsiveness improve in this group of subjects with occupational asthma long after exposure ended.

BOHRF Associated Evidence Statements

The BOHRF occupational asthma guidelines state that this reference is associated with the following evidence statements

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The symptoms and functional impairment of occupational asthma caused by various agents may persist for many years after avoidance of further exposure to the causative agent.

Non Bohrf Information

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