Do subjects investigated for occupational asthma through serial peak expiratory flow measurement falsify their results ?
Background and aim
Serial assessment of peak expiratory flow (PEF) rates has been advocated as a sensitive and specific means of investigating occupational asthma.
The possibility that, for several reasons, subjects do not accurately report their values has been raised.
The availability of portable instruments that assess PEF and store timings and values now makes it possible to estimate compliance and accuracy of results.
Twenty-one subjects consecutively investigated for occupational asthma were asked to assess their PEF every 2 hours during the day, both at work and away from work, with a VMX instrument (Clement Clarke International, Columbus, Ohio) and record the times and values on a sheet of paper.
The subjects were not aware that the data were also being stored on a computer chip.
The diagnosis was occupational asthma in eight subjects, personal asthma in four subjects, and neither condition in nine subjects.
The mean duration of recording was 36 days (range, 14 to 79 days).
At least 6048 values should have been recorded, but only 4839 (80%) were either recorded or stored.
In this survey of 21 subjects investigated for possible occupational asthma, compliance with PEF recording as assessed by comparing recorded and stored results and the time at which the recording was solicited, was poor.
Mots-clés Pascal : Asthme, Maladie professionnelle, Exploration, Fonction respiratoire, Débit expiratoire maximum, Autoévaluation, Complaisance, Canada, Amérique du Nord, Amérique, Homme, Appareil respiratoire pathologie, Bronchopneumopathie obstructive, Médecine travail
Mots-clés Pascal anglais : Asthma, Occupational disease, Exploration, Lung function, Maximum expiratory flow rate, Self evaluation, Compliance, Canada, North America, America, Human, Respiratory disease, Obstructive pulmonary disease, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0032090
Code Inist : 002B11B. Création : 01/03/1996.