In their study, RXFP1, RAMP2-AS1, LINC00312, and LINC00472 were identified as key lncRNAs in smoking-associated lung cancer; however, their area under the curve (AUC) value is 0.608 and is smaller than that in our study, indicating that our model is more accurate (Figure 6(b)). The gene discussed is RXFP1; the disease is lung cancer.