CHI3L1 and asbestosis: Plasma YKL-40 concentration (median and IQR) was higher in subjects with asbestosis (64.4, 35.1–138.1 ng/ml) than in asbestos-exposed subjects without asbestosis (36.4, 27.3–76.7 ng/ml, p = 0.033) or in unexposed controls (32.8, 23.5–59.3 ng/ml, p = 0.008), as presented in Figure 1.