Diagnostic performance of magnifying narrow-band imaging for early gastric cancer: A meta-analysis

Table 2 Quality of articles using the quality assessment of diagnostic accuracy studies tool

Ref.	Item 1	Item 2	Item 3	Item 4	Item 5	Item 6	Item 7	Item 8	Item 9	Item 10	Item 11	Item 12	Item 13	Item 14	Scores
Liu et al[19]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	14
Yao et al[20]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	14
Kanesaka et al[21]	N	Y	Y	Y	Y	Y	Y	Y	Y	U	Y	Y	Y	Y	12
Tao et al[4]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	Y	Y	Y	13
Horiuchi et al[22]	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	U	Y	Y	Y	12
Maki et al[5]	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	U	Y	Y	Y	12
Miwa et al[6]	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	U	Y	Y	Y	12
Tsuji et al[24]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	14
Li et al[23]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	14
Ezoe et al[3]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	Y	Y	N	12
Nonaka et al[25]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	14
Ezoe et al[7]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	Y	Y	Y	13
Kato et al[8]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	N	Y	Y	Y	13
Yao et al[26]	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	U	Y	Y	13

Item 1: Was the spectrum of patients representative of the patients who will receive the test in practice? Item 2: Were selection criteria clearly described? Item 3: Is the reference standard likely to correctly classify the target condition? Item 4: Is the time period between reference standard and index test short enough to be reasonably sure that the target condition did not change between the two tests? Item 5: Did the whole sample or a random selection of the sample receive verification by using a reference standard of diagnosis? Item 6: Did patients receive the same reference standard regardless of the index test result? Item 7: Was the reference standard independent of the index test? Item 8: Was the execution of the index test described in sufficient detail to permit replication of the test? Item 9: Was the execution of the reference standard described in sufficient detail to permit its replication? Item 10: Were the index test results interpreted without knowledge of the results of the reference standard? Item 11: Were the reference standard results interpreted without knowledge of the results of the index test? Item 12: Were the same clinical data available when test results were interpreted as would be available when the test is used in practice? Item 13: Were uninterpretable/intermediate test results reported? Item 14: Were withdrawals from the study explained? Y: Yes; N: No; U: Unclear.