From: Serum concentrations of Krebs von den Lungen-6, surfactant protein D, and matrix metalloproteinase-2 as diagnostic biomarkers in patients with asbestosis and silicosis: a case–control study
Stage I
stage II
Stage III
P value
n
21
8
16
KL-6, U/ml
200.2 ± 101.6
206.0 ± 127.8
314.6 ± 248.2
0.122
SP-D, ng/ml
7.0 ± 4.2
10.5 ± 7.0
7.3 ± 4.7
0.235
MMP-2, ng/ml
105.0 ± 27.4
100.9 ± 18.4
101.5 ± 19.3
0.869