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Table 4 Correlations between serum biomarkers and baseline levels of BAFF and APRIL

From: B cell‐activating factors in autoimmune pulmonary alveolar proteinosis

Biomarker BAFF APRIL
ρ p ρ p
KL-6 0.50 < 0.0001* 0.15 0.12
SP-D 0.48 < 0.0001* 0.20 0.04*
SP-A 0.43 < 0.0001* 0.15 0.17
LDH 0.47 < 0.0001* 0.13 0.17
GM-CSF autoantibody 0.13 0.19 0.07 0.14
  1. Abbreviations: BAFF, B cell-activating factor; APRIL, a proliferation-inducing ligand; KL-6, Krebs von den Lungen-6; SP-D, surfactant protein-D; SP-A, surfactant protein-A; LDH; lactate dehydrogenase; GM-CSF, granulocyte-macrophage colony-stimulating factor. Data were analyzed using Spearman’s correlation coefficient. *Significant at the 0.05 level