Multivariate Cox regression analysis showed that being in the first DKK3 expression tertile was an independent predictor of greater OS and PFS in GBM patients compared to patients in the highest tertile (HR, 0.73; 95% CI, 0.55–0.97; p = 0.031; HR, 0.75; 95% CI, 0.56–0.99; p = 0.044, respectively) (Table 2). The gene discussed is DKK3; the disease is glioblastoma.