Characteristics of eligible studies
Using the specified keywords, a total of 89 articles were identified. Ten articles that met our inclusion criteria were included in the quantitative synthesis (Figure. 1). The studies comprised a total of 6917 cases and 8977 controls with gastric cancer, cervical squamous cell carcinoma, osteosarcoma, colorectal cancer, hepatocellular cancer, glioma, breast cancer, and lung cancer. Three eligible studies had a population-based design, and seven were hospital-based. All the studies were performed in Asian populations. The data are summarized in Table 1.
Quantitative data synthesis for rs145204276 indel