Table 1.

Summary of the systematic review and meta-analysis by Tan et al.[4]

	Breast	Colorectal	Esophageal	Gastric	Lung
Mortality	√	√	√	X	X
Disease progression	√	√	N/A	N/A	X
Lymph node metastasis	N/A	√	X	√	X
Distant metastasis	N/A	√	X	√	N/A

Five major cancer types were examined for their association to four clinical outcomes. √: increased risk association with the cancer type; X: no association; N/A: not examined in the 26 studies included in this meta-analysis.