Table 6. Inflammatory markers in sputum.

	0 ppm	High ACR
Exposure condition
Sputum cells, cells/mg	328 (62–1146)	280 (60–2585)
Interleukin-6, pg/ml	15.4 (1.0–46.1)	15.8 (2.5–133.4)
Interleukin-8, pg/ml	439 (107–2545)	426 (163–1573)
Differential cell count (%)
Macrophages	56.0 (33.5–63.5)	55.3 (30.0–63.5)
Neutrophils	36.1 (28.5–51.0)	37.9 (20.0–63.0)
Eosinophils	1.8 (0–37.5)	2.0 (0–20.5)
Lymphocytes	5 (1.0–7.7)	4.3 (1.0–16.1)

Samples collected from 18 volunteers after 2 h exposure to 0 ppm (control exposure) and 0.1 ppm of acrolein. Values are given as median with range in parentheses.