Chronic kidney disease severely deteriorates the outcome of gastrointestinal bleeding: A meta-analysis

Table 3 Stars based on the Modified Newcastle-Ottawa Scale

Ref.	Item 1	Item 2	Item 3	Item 4	Item 5	Item 6	Total (*)
Boyle et al[17], 1983	*	*	-	*	*		4
Cheung et al[10], 2010	*	*	*	*	*	*	6
Hung et al[25], 2014	*	*	-	-	-		2
Sood et al[9], 2012	*	*	-	-	-		2
Tsai et al[16], 1996	*	*	*	-	*	-	4
Zuckerman et al[26], 1985	*	*	-	-	-	*	3