Table 6

Summary of the Scottish Intercollegiate Guidelines Network (SIGN) quality assessment [19]
Lead author/study 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 2.1
Dickman [31] WC WC WC WC WC WC WC WC WC WC WC WC N/A ++
Bautista [32] WC WC WC WC WC WC WC WC WC WC WC WC N/A ++
Fass [33] WC WC WC WC WC WC WC WC WC WC WC WC WC ++
Pandak [34] WC WC WC WC WC WC WC WC WC WC WC PA PA +
Kim [35] WC WC WC WC WC WC WC WC WC WC WC PA PA ++
Xia [36] WC WC WC WC WC WC WC WC WC WC WC WC WC ++
Kushinir [37] WC WC AA PA WC WC WC WC WC NA NA N/A PA +
Lacima [38] WC PA WC WC WC WC WC WC WC NA NA WC WC +
Cooke [39] WC AA WC WC WC WC WC WC WC NA NA WC WC +
Bovero [40] WC PA WC WC WC WC WC WC WC NA NA WC WC +
Romand [41] WC AA WC WC WC WC WC WC WC NA NA WC WC +
Abrahao [42] WC WC WC WC WC WC WC WC WC NA NA WC WC ++
Ho [29] WC PA WC WC WC WC WC WC WC NA NA PA WC +
Kim [24] WC WC WC WC WC WC WC WC WC NA NA WC WC ++
Hong [25] WC WC WC WC WC WC WC WC WC NA NA WC WC ++
Netzer [26] WC AA WC WC WC WC WC PA WC NA NA WC WC +
Mousavi [27] WC WC WC WC WC WC WC WC WC NA NA WC WC ++
Singh [28] WC PA WC WC WC WC WC AA WC NA NA WC WC +
Lam [30] WC PA WC WC WC WC WC WC WC NA NA WC WC +
Achem [43] WC WC WC WC WC WC WC AA WC NA NA WC WC +
Demiryoguran [48] WC WC WC WC WC WC WC WC WC WC WC WC WC ++
Foldes-Busque [49] WC WC WC WC WC WC WC WC AA WC NA WC N/A ++
Kujipers [47] WC WC WC WC WC WC WC WC WC NA NA WC WC ++
Katerndahl [51] WC AA WC WC WC WC WC WC WC WC WC WC WC ++
Fleet [50] WC WC WC WC WC WC WC WC WC WC WC WC WC ++
Stochkendahl [44] WC WC WC NA WC WC PA WC WC NA NA WC WC +
Manchikanti [46] WC WC WC WC PA PA WC WC WC WC PA PA WC +
Bosner [45] WC WC WC WC WC WC WC AA WC WC AA WC WC ++

1.1: spectrum of patients is representative of patients who will receive the test; 1.2: selection criteria described; 1.3: reference standard is likely to classify the condition correctly; 1.4: period between reference standard and index test short enough; 1.5: whole sample received verification of diagnosis; 1.6: patients receive same reference test regardless of index test results; 1.7: reference standard independent of index test; 1.8: execution of index test described in detail; 1.9: reference standard described in detail; 1.10: index test interpreted without knowledge of result of reference test; 1.11: reference standard results interpreted without knowledge of result index test; 1.12: uninterpretable or intermediate results are reported; 1.13: explanation is provided for withdrawals; 2.1: reliability of the conclusion of the study. Risk of bias (2.1) is as follows. (++), high quality: most of the criteria have been fulfilled. If not fulfilled, the conclusions of the study are very unlikely to alter. (+), moderate quality: some criteria fulfilled. Criteria not adequately described are unlikely to alter the conclusions. (−), low quality: few or no criteria fulfilled. The conclusions are likely to alter.

AA adequately addressed, N/A not applicable, NA not addressed, NR not reported, PA poorly addressed, WC well covered.

Wertli et al.

Wertli et al. BMC Medicine 2013 11:239   doi:10.1186/1741-7015-11-239

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