Figure 7From: Prognostic value of immunohistochemical surfactant protein A expression in regenerative/hyperplastic alveolar epithelial cells in idiopathic interstitial pneumoniasCorrelation between the SP-A positive ratio and FF score in UIP patients. SP-A positive ratio = number of SP-A positive epithelial cells/total number of alveolar epithelial cells in studied areas × 100. FF scores indicate the number of fibroblastic foci within a lower-power magnification field.Back to article page