Differential cell count in induced sputum at baseline and the exposure effect adjusted for period 6 hours after the start of exposure to ozone compared to clean air.

Mean ± SEM, n = 14, CI confidence limits, g = gram, perc = per cent, cells/g = cells/gram, neutros = neutrophil granulocytes, macros = macrophages, eos = eosinophil granulocytes, lymphos = lymphocytes, epis = epithelial cells.