CXCL8 and bronchopulmonary dysplasia: However, IL-877 was a minor proportion of the total IL-8 in all of the samples, and there was no significant difference between the two groups (IL-877 in No-BPD median 2.9%, 1.3–5.3% vs BPD 2.3%, 1.5–3.0%; p = 0.39, Figure 1c); significant correlation was observed between total IL-8 expression and corresponding IL-877 concentration in preterm BALF (n = 22, Spearman r = 0.94, p<0.0001; Figure S3 in File S1).