Then, univariate COX and multivariate COX regression models were also applied to SCLC (Jiang et al.), and the results showed that MMP9-High was not only related to significantly prolonged clinical prognosis time (Figure 2B; HR = 0.365; p = 0.0219) but it can also be used as an independent predictor (Figure 2B; HR = 0.352; p = 0.0199). The gene discussed is MMP9; the disease is small cell lung carcinoma.