Systematic Reviews
Copyright ©The Author(s) 2021.
World J Gastrointest Oncol. May 15, 2021; 13(5): 453-461
Published online May 15, 2021. doi: 10.4251/wjgo.v13.i5.453
Table 2 Subgroup analysis by potential confounders1


Men
Women
Both
All1.18 (1.06-1.32) [13]1.07 (0.95-1.19) [7]1.13 (1.04-1.23) [27]
Region
Asia1.22 (1.09-1.36) [8]1.09 (0.91-1.29) [3]1.43 (1.02-1.28) [13]
Non-Asia1.12 (0.83-1.50) [5]1.07 (0.83-1.38) [4]1.11 (0.99-1.24) [14]
Level of adjustment of smoking status
Low1.14 (0.91-1.41) [7]1.07 (0.95-1.20) [5]1.16 (1.06-1.27) [10]
High1.19 (1.08-1.31) [6]1.09 (0.84-1.43) [2]1.12 (0.98-1.27) [17]
Adjustment of body mass index
No1.05 (0.83-1.34) [5]1.48 (0.93-2.36) [2]1.12 (0.92-1.36) [8]
Yes1.22 (1.08-1.37) [8]1.05 (0.96-1.17) [5]1.13 (1.03-1.24) [19]
Year of publication
Approximately 20051.08 (0.88-1.33) [4][0]1.08 (0.89-1.33) [5]
2006-20101.07 (0.81-1.41) [3]1.48 (0.93-2.36) [2]1.14 (0.98-1.32) [8]
2011-1.26 (1.02-1.56) [6]1.05 (0.95-1.17) [5]1.14 (1.00-1.29) [14]
Site
Cardia1.07 (0.79-1.44) [1]1.30 (0.43-3.90) [1]1.05 (0.81-1.35) [3]
Non-cardia0.75 (0.53-1.06) [1]0.66 (0.24-1.82) [1]0.84 (0.65-1.08) [3]