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Table 3 NOS quality assessment of final article pool

From: Clipping versus coiling in posterior circulation intracranial aneurysms: a meta-analysis

Study Selection Outcome not present at the start of the study Comparability based on the design or analysis Outcome Adequacy of follow-up Score
Representativeness Selection Ascertainment of exposure Assessment of outcome Follow-up long enough
Seifert et al. 8
Lusseveld et al. 8
Uhl et al. 8
Sheah et al. 8
Sandalcioglu et al. 8
Molyneux et al. 8
Kocaeli et al. 8
Sung et al. 9
Jin et al. 9
Kaku et al. 7
Nourbakhsh et al. 8
Zhou et al. 7
Tokimura et al. 7
Hong et al. 8
Spetzler et al. 9
Sharma M et al. 9
Bacigaluppi et al. 9
Sharma S et al. 9
Jang eta al. 8
Sejkorova et al. 9
  1. NOS scale awards each item with one point (•). Comparability is awarded with a maximum of two points (••). In case an article doesn’t meet a criterion, it gains no points (-). A total score less than 5 for an article means high risk of bias