Correlations between the expression levels of 20 miRNAs, which were selected according to Cox survival analyses of 240 lung adenocarcinoma patients' data from The Cancer Genome Atlas, and overall survival (OS), respectively. Expression levels of miR-1292 (A), miR-1254 (B), miR-3682 (D), miR-3691 (E), miR-320d-1 (F), miR-1262 (G), miR-7-2 (I), miR-7-3 (J), miR-550a-1 (L), miR-450a-2 (N), miR-147b (O), miR-760 (Q), miR-450a-1 (R), and miR-3677 (S) were not related to OS. Patients with high miR-3940 (C), miR-873 (H), miR-550a-2 (K), miR-1293 (M), miR-421 (P), and miR-212 (T) expression had shorter OS (P<0.05).