A large number of randomized controlled trials involving
chemotherapy in the management of advanced
colorectal cancer were conducted. 5-FU/LV in combination with
irinotecan (IRI) or
oxaliplatin (OXA) was used. The aim of the meta-analysis was to compare and evaluate the effectiveness and safety of the two therapeutic approaches for patients with advanced
colorectal cancer. A literature search, study selection and assessment, data collection, and analysis were undertaken by two reviewers according to the Cochrane Handbook for Systematic Reviews of Interventions. Randomized controlled trials (RCTs) or quasi-RCTs comparing IRI versus OXA, in combination with 5-FU/LV in the treatment of advanced
colorectal cancer were performed. Seven studies involving 2,107 patients met the inclusion criteria. The OXA + 5-FU/LV regimen showed a significant increase in survival by lower hazard ratios (HR) [HR 1.28; 95% CI (1.13-1.45)] and was associated with lower toxicities. The OXA + 5-FU/LV regimen was superior or equal to the IRI + 5-FU/LV regimen in prolonging time to progression and median survival. The IRI + 5-FU/LV regimen resulted in higher hazard ratios in
nausea vomiting/
emesis and
diarrhea [HR 1.99, 95% CI (1.19-3.31); HR 1.83, 95% CI (1.38-2.44)] and lower hazard ratios in
paresthesia, sensory neuropathy, and
thrombocytopenia [HR 0.09, 95% CI (0.03-0.23); HR 0.04 95% CI (0.01-0.13); HR 0.19 95% CI (0.05-0.64)] than the OXA + 5-FU/LV regimen. Compared with IRI, OXA is more appropriate for the treatment of advanced
colorectal cancer when combined with 5-FU/LV. OXA + 5-FU/LV should be considered as the first-line standard of care for advanced CRC patients.