Changes in airways conductance on smoking a cigarette: A study of repeatability and of the effect of particulate and vapour phase filters

AUTOR(ES)

Clarke, B. G.

RESUMO

Measurements of airways conductance using a body plethysmograph were made on 25 men before and after smoking one cigarette on each of four days and before and after a control period without smoking on another day. The repeatability of these measurements and of the bronchoconstrictor effect of smoking was studied. The variance was as great as that observed in a previous field study in industry despite close supervision and a stable environment before the measurements. We think this variation is due to random fluctuation rather than to the lack of close supervision inevitable in a field survey.

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