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