Fig. 2From: Increased expression of TROP2 in airway basal cells potentially contributes to airway remodeling in chronic obstructive pulmonary diseaseCorrelation between the level of TROP2 protein expression based on immunostaining and FEV1%. Spearman rank correlation was used to examine the relationship between TROP2 expression and FEV1%. TROP2 expression is inversely correlated with FEV1% (r = −0.53, P < 0.01)Back to article page