Imaging of paraduodenal pancreatitis: A systematic review

Table 2 Risk of bias assessment

Ref.	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Outcome of interest was not present at start of study	Comparability of cohorts	Assessment of outcome	Follow-up long enough	Adequacy of follow up	Total
Ishigami et al[17]	±	-	-	-	-	-	NA	NA	6
Kalb et al[18]	±	-	-	-	-	-	NA	NA	6
Zaheer et al[19]	±	NA	-	+	NA	-	NA	NA	2
Arvanitakis et al[11]	±	NA	±	+	NA	-	-	-	3
Wagner et al[20]	+	NA	±	-	NA	+	NA	NA	1
Arora et al[3]	±	NA	±	+	NA	-	-	-	3
Shin et al[21]	±	-	-	-	±	-	NA	NA	4
Boninsegna et al[22]	-	±	-	-	±	-	NA	NA	4
de Pretis et al[2]	-	NA	-	-	NA	-	-	-	6
Muraki et al[9]	-	-	-	-	-	-	NA	NA	7
Tarvainen et al[16]	±	±	-	-	-	-	-	-	6
Ooka et al[7]	-	-	-	-	-	-	-	-	9
Değer et al[15]	-	NA	-	-	NA	-	-	-	6
Kulkarni et al[12]	-	NA	-	-	NA	-	NA	NA	4

-: Low risk of bias; ±: Unknown risk of bias; +: High risk of bias; NA: Not appliable.