Table 2. Cytokine levels correlate with cell type in preterm lavage.

	IL-1β		CXCL8		CCL3		CCL4		IL-10
Cell type	p	r2	p	r2	p	r2	p	r2	p	r2
CD15+	-	-	-	-	-	-	0.04	0.42	0.02	0.54
CD14/16+	-	-	-	-	-	-	0.04	0.47	-	-
CD14/36+	-	-	-	-	-	-	0.03	0.44	-	-
CD14/HLA-DR+	0.001	0.69	0.003	0.63	-	-	0.0004	0.77	0.0001	0.89

Preterm infants were ventilated and lavaged within 24 hours of birth and cells stained with combinations of anti-CD15, anti-CD14, anti-CD16, anti-HLA-DR, anti-CD36 or matched isotype antibodies and analysed by flow cytometry. Cytokine bead arrays were carried out on cell-free lavage and the following cytokines were measured: IL-1β, CXCL8, CCL3, CCL4, and IL-10. Correlations of cytokine levels and absolute numbers of cells were analysed by linear regression and significant correlations are shown in the table.