LINC00309 and breast cancer: LINC00309 high expression was an independent poor predictor for DFS BC based on both univariate (HR = 1.990; 95% CI 1.069–3.703; p = 0.030) and adjusted multivariate survival analyses (HR = 2.127; 95% CI 1.074–4.212; p = 0.030) (Table 1).