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Table 1 Quality assessment of published papers on meat and colorectal cancer in Middle East and North African countries

From: Meat and colorectal cancer in Middle Eastern and North African countries: update of literature review

Author/Year/Reference Relevant to this SR Aims clearly stated Appropriate study method Sample representative of target population Confounding and bias considered Good response rate? Were questions piloted? Tables/figures understandable Can results be applied to local situation? Accepted as type IV evidence? [17]
Nashar and Almurshed, 2008 [18] Yes Yes Yes No No Yes No Yes Yes No (type III)
Bener et al., 2010 [19] Yes Yes Yes No Yes No No Yes Yes No (type III)
Guesmi et al., 2010 [20] Yes Yes No No No Yes No Yes Yes No (type III)
Arafa et al., 2011 [21] Yes Yes Yes No Yes No No Yes Yes No (type III)
Safari et al., 2013 [22] Yes Yes Yes No Yes Yes Yes Yes Yes No (type III)
Mahfouz et al., 2014 [23] Yes Yes Yes No Yes Yes No Yes Yes No (type III)
Abu Mweis et al., 2015 [24] Yes Yes Yes Yes Yes No Yes Yes Yes No (type III)
Tayyem et al., 2015 [25] Yes Yes Yes Yes Yes No Yes Yes Yes No (type III)
Azizi et al., 2015 [26] Yes Yes Yes No Yes Yes Yes Yes Yes No (type III)
Tayyem et al., 2016 [27] Yes Yes Yes No Yes Yes Yes Yes Yes No (type III)
El-Moselhy et al., 2017 [28] Yes Yes Yes No Yes Yes No Yes Yes No (type III)
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