Comparing SMAD4-mutated CRC patients with SMAD4 wild-type CRC patients, the summary HR for OS was 1.46 (95% CI 1.28–1.67, P = 0.001), the summary HR for PFS/RFS was 1.59 (95% CI 1.14–2.22, P = 0.006). Here, SMAD4 is linked to colorectal carcinoma.