Oasys at the BTS 2010 |
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Members of the Oasys team presented the following work at the British Thoracic Society Winter Meeting 2010.
Does the size of peak flow changes affect prognosis
Sherwood Burge presented Wasif Anees' work looking at whether the magnitude of reaction to the causative agent effects the prognosis for a patient during continued exposure to the causative agent. Two thirds of occupational asthmatics have an increased rate of FEV1 decline and this is not related to the magnitude of changes between work and rest days in serial peak flow records. Therefore patients with small changes need to be treated in the same way as those with large changes.
Effect of Shift Work on PEF
Vicky Moore (in abenstia) gave a talk on the effect of shift type (day shift, afternoon shift or night shift) on peak flow. The main conclusions are that day shifts are likely to have higher ABC scores than afternoon night shifts in patients with occupational asthma, although there is a lot of noise and this varies widely between patients. The 15 l/min/hr cut off for analysing day shifts with the ABC score is applicable to all shift types.
Timepoint version 2
Cedd Burge presented a poster on some refinements to the timepoint scoring technique. This improved the theoretical results but was no better in practice so we are sticking with the original timepoint score at the moment. Some further work may be required on how much sleep affects circadian rhythm.
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