qRT-PCR analysis of lncRNA MEG3 in NSCLC tissues. (A) MEG3 expression in NSCLC tissues and its clinical significance. MEG3 was measured in 44 pair NSCLC and normal tissues by qRT-PCR (shown as ΔCT). (B and C) Data are presented as relative expression level in tumor tissues (shown as ΔCT). MEG3 expression was significantly lower in patients with a higher pathological stage and big tumor size. (D) Patients with low levels of MEG3 expression showed reduced survival times compared to patients with high levels of MEG3 expression (log rank P < 0.001). **, P < 0.01.