Predicted survival analyses according to expression levels of PSMG1~4 (proteasome assembly chaperone 1~4) in lung adenocarcinoma (LUAD) patients. The two survival curves respectively present percentages of LUAD survivors over time, in patients with low (black curves) and high (red curves) expressions of PSMG1~4. Elevated mRNA levels of the PSMG1 and PSMG2 genes resulted in good prognoses, whereas elevated mRNA levels of PSMG3 and PSMG4 showed the contrary. (HR, hazard ratio; OS, overall survival; FP, first progression; PPS, post-progression survival; p < 0.05 was considered statistically significant).