986 NSCLC patients were categorized into training and testing cohorts randomly at a ratio of 7:3, and 9 of the 10 prognostic FRGs-lncRNAs (AQP4-AS1, DANCR, LINC00460, LINC00892, LINC00996, MED4-AS1, SNHG7, UCA1, and WWC2-AS2) were eventually used for prognostic signature construction (Fig. 6A, B, Additional file 2: Table S5). The gene discussed is MED4; the disease is non-small cell lung carcinoma.