Fig. 3

Correlation between TSLP and IL-33 levels in bronchoalveolar lavage fluid from the patients with IPF. Correlations were analyzed using Spearman’s correlation coefficient analysis. When the patients were divided into four groups using the median IL-33 (4.13 pg/μg) and TSLP (9.25 pg/μg) levels as cut-offs, 22 subjects had elevated levels of both cytokines, while 22 subjects had levels below both medians and 28 subjects had elevated levels of IL-33 only, while 28 subjects had elevated TSLP only. Differences in the clinical and physiological profiles among the four groups are presented in Table 2