Efficacy of various endoscopic modalities in detecting dysplasia in ulcerative colitis: A systematic review and network meta-analysis

Table 2 Jadad score and Cochrane Risk of Bias Assessment Instrument

Ref.	Was the study described as randomized?	Was the randomization scheme described and appropriate?	Was the study described as doubleblind?	Was the method of double blinding appropriate?	Was there a description of dropouts and withdrawals?	Total Jadad score	Se-quence generation (for arm randomization)	Allocation con-cealed	Blinding of outcomes	Incomplete outcome data addressed	ITT	Sample size calculation
Dekker et al[32], 2006	o	NA	o	o	o	4	x	x	o	o	o	o
Van den Broek et al[33], 2011	o	NA	x	NA	x	1	?	?	x	?	o	x
Ignjatovic et al[34], 2012	o	NA	o	NA	o	3	?	?	?	o	o	o
Leifeld et al[35], 2015	o	NA	x	NA	x	1	o	o	x	?	?	x
Kiesslich et al[36], 2003	o	o	o	NA	o	4	o	o	o	o	o	o
Watanabe et al[37], 2016	o	o	o	NA	o	4	o	o	o	o	o	o

ITT: Intention to treat; NA: Not available.