This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

CRR 450/2002
Evaluation of an expert system for the interpretation of serial peak expiratory flow measurements in the diagnosis of occupational asthma in a field trial

Oasys-2 is a computer based analytical tool for the evaluation of serial measurements of peak expiratory flow (PEF). It has been evaluated in clinic populations and has been found to have a sensitivity of 75% for the diagnosis of occupational asthma when evaluated against gold standard diagnostic methods independent of PEF measurement {1}. Its specificity is 94%. In the clinic situation around 50% of attendees provide an adequate record for diagnosis after postal
instruction, rising to 85% after personal instruction and encouragement {2}. Oasys-2 has not been evaluated adequately in an epidemiological setting.
Workers exposed to grain have a variety of occupational respiratory diseases, including allergic and irritant asthma, grain fever, alveolitis and occupational COPD. The HSE has an ongoing study of farmers and dockers, including questionnaires, specific IgE measurements and lung function measurements. The existing populations in these studies were used to evaluate Oasys-2 in the field situation.

Some of these research reports are very large. For information about expected download times please see our FAQs pages.

Updated 2010-03-19