Published in:
01-06-2014 | Review - Clinical Oncology
Red meat consumption and stomach cancer risk: a meta-analysis
Authors:
Peng Song, Ming Lu, Qin Yin, Lei Wu, Dong Zhang, Bo Fu, Baolin Wang, Qinghong Zhao
Published in:
Journal of Cancer Research and Clinical Oncology
|
Issue 6/2014
Login to get access
Abstract
Purpose
The association of red meat consumption with the risk of stomach cancer has been reported by many studies, with inconclusive results. We performed a meta-analysis of cohort and case–control studies to provide a quantitative assessment of this association.
Methods
Relevant studies were identified by searching PubMed and Embase before December 2013 without restrictions. A total of 18 studies involving 1,228,327 subjects were included in this meta-analysis. Summary relative risks were estimated using random effects models.
Results
The pooled relative risks of gastric cancer were 1.37 (95 % CI 1.18–1.59) for the highest versus lowest categories of red meat intake with significant heterogeneity among studies (P
heterogeneity < 0.001, I
2 = 67.6 %). When stratified by the study design, the significant associations were observed in population-based case–control studies (RR 1.58; 95 % CI 1.22–2.06; P
heterogeneity < 0.001, I
2 = 73.0 %) and hospital-based case–control studies (RR 1.63; 95 % CI 1.38–1.92; P
heterogeneity = 0.284, I
2 = 19.1 %). However, no association was observed among cohort studies (RR 1.00; 95 % CI 0.83–1.20; P
heterogeneity = 0.158, I
2 = 33.9 %). The significant association was also presented in the subgroup analysis by geographic area (Asia, Europe), publication year (≥2000), sample size (<1,000, ≥1,000) and quality score (<7 stars, ≥7 stars). The dose–response analysis associated every 100 g/day increment in red meat intake with a 17 % increased gastric cancer risk (RR 1.17; 95 % CI 1.05–1.32). A linear regression model further revealed that the risk of gastric cancer increased with increasing level of red meat consumption.
Conclusions
Increased intake of red meat might be a risk factor for stomach cancer. Further larger prospective studies are warranted to verify this association.