Abstract
OBJECTIVE: The prognostic significance of the C-reactive protein-albumin-lymphocyte (CALLY) index in digestive system neoplasms (DSNs) has been investigated in several studies, but inconsistencies remain between the results of different studies. Therefore, the aim of this study was to confirm the prognostic significance of CALLY in patients with DSNs and its association with clinicopathological characteristics (CPCs). METHODS: The databases PubMed, Cochrane Library, Web of Science, Research Square and Embase were systematically searched for clinical trials with databases up to 1 November 2024. The value of CALLY in predicting overall survival (OS), disease-free survival (DFS) and recurrence-free survival (RFS) versus cancer-specific survival (CSS) in patients with DSNs was confirmed by calculating the combined hazard ratio (HR) and 95% CI. The combined OR and 95% CI were calculated to assess the association between CALLY and CPCs in patients with DSNs. RESULTS: A total of 18 studies with 7916 patients with DSNs were included in this study. Pooled analysis showed that lower CALLY was associated with poor OS, DFS, RFS and CSS were significantly associated. In addition, low CALLY index was associated with male gender, T3-T4, lymph node metastasis, lymph vessel invasion, complications, stage III-IV and surgical approach were significantly associated. However, there was no association between low CALLY index and histological type, adjuvant chemotherapy, and neoadjuvant chemotherapy. CONCLUSIONS: In this meta-analysis, a low CALLY index was significantly associated with poor OS, DFS, RFS and CSS in patients with DSNs and with several CPCs in patients with DSNs. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42024622973.