Background
Systemic inflammatory response (SIR) plays important roles in initiation, promotion and progression of tumor. However, the prognostic role of baseline circulating platelet–to–lymphocyte ratio (PLR) (known as a marker of SIR) in human stage Ⅳ gastric cancer (GC) remains controversial. Hence, we performed this meta-analysis to assess the value of it in prognosis prediction for stage Ⅳ GC patients.
Methods
We searched PubMed, Embase and EBSCO to identify the studies and computed extracted data with STATA 12.0.
Results
A total of 2721 patients with stage Ⅳ GC from 12 published studies were incorporated into this meta-analysis. We found that elevated baseline circulating PLR was significantly associated with decreased overall survival (OS), but not with progression–free survival (PFS) in stage Ⅳ GC patients. However, in stratified analyses, high PLR was remarkably associated with worse 1-year OS, but not with 2-year, 3-year, 4-year or 5-year OS; In addition, it was considerably related with reduced 6-month PFS, but not with 1-year or 2-year PFS. Moreover, high PLR markedly correlated with peritoneal metastasis of patients.
Conclusion
elevated baseline circulating PLR decreased 1-year OS and 6-month PFS in stage Ⅳ GC patients, implicating that it is a valuable prognostic index for these patients and modifying the inflammatory responses may have a potential for effective treatment.

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No competing interests reported.
This is a list of supplementary files associated with this preprint. Click to download.
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Posted 03 May, 2021
Posted 03 May, 2021
Background
Systemic inflammatory response (SIR) plays important roles in initiation, promotion and progression of tumor. However, the prognostic role of baseline circulating platelet–to–lymphocyte ratio (PLR) (known as a marker of SIR) in human stage Ⅳ gastric cancer (GC) remains controversial. Hence, we performed this meta-analysis to assess the value of it in prognosis prediction for stage Ⅳ GC patients.
Methods
We searched PubMed, Embase and EBSCO to identify the studies and computed extracted data with STATA 12.0.
Results
A total of 2721 patients with stage Ⅳ GC from 12 published studies were incorporated into this meta-analysis. We found that elevated baseline circulating PLR was significantly associated with decreased overall survival (OS), but not with progression–free survival (PFS) in stage Ⅳ GC patients. However, in stratified analyses, high PLR was remarkably associated with worse 1-year OS, but not with 2-year, 3-year, 4-year or 5-year OS; In addition, it was considerably related with reduced 6-month PFS, but not with 1-year or 2-year PFS. Moreover, high PLR markedly correlated with peritoneal metastasis of patients.
Conclusion
elevated baseline circulating PLR decreased 1-year OS and 6-month PFS in stage Ⅳ GC patients, implicating that it is a valuable prognostic index for these patients and modifying the inflammatory responses may have a potential for effective treatment.

Figure 1

Figure 2

Figure 3

Figure 4
No competing interests reported.
This is a list of supplementary files associated with this preprint. Click to download.
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