Figure 6

Disease-free interval and survival in relation to surfactant apoprotein A expression in small-size lung adenocarcinoma. Kaplan–Meier plots are shown for postoperative disease-free interval (a) and survival (b) in cases with high surfactant apoprotein A expression (surfactant apoprotein A=4) and lower surfactant apoprotein A expression (surfactant apoprotein A≤3) in the micropapillary pattern area. Log-rank analysis indicated a significant difference in disease-free interval (P=0.03) between these groups, but there were no cases of death in the high surfactant apoprotein A expression group.