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Systematic Reviews
©The Author(s) 2019.
World J Gastroenterol. Aug 21, 2019; 25(31): 4512-4533
Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4512
Table 2 Summary of studies from systematic review
SAKenUgaZimMalSudNigTanZamEgyMozSenBotGhaEthMulti
Studies on epidemiology (n = 48)
Total number of studies per country13843333221111––1
Number of studies in cities/provinces85333332211111
Studies on risk factors (n = 37)
Total number of studies per country185321–1121–––21–
Number of studies on tobacco consumption103222––12––––11–
Number of studies on alcohol consumption5111––––––––––1–
Studies on management and outcomes (n = 34)
Total number of studies per country183––121––7––––11
Number of studies that report on chemotherapy5–––––––––––––––
Number of studies that report on radiotherapy3––––––––––––––1
Number of studies that report on chemoradiotherapy4––––––––1––––––


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