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Table 2 Results of quality assessment using the NOS for cohort studies

From: Intraoperative lumbar drainage can prevent cerebrospinal fluid leakage during transsphenoidal surgery for pituitary adenomas: a systematic review and meta-analysis

  Selection   Comparability Outcome  
Study Representativeness of the Exposed Cohort Selection of the Non-Exposed Cohort Ascertainment of Exposure Demonstration That Outcome of Interest Was Not Present at Start of Study Comparability of Cohorts on the Basis of the Design or Analysis Assessment of Outcome Was Follow-Up Long Enough for Outcomes to Occur Adequacy of Follow Up of Cohorts Quality Score
Liu 2020 [12] 8
Mehta 2012 [13] 8
Sade 2006 [14] 7
Alharbi 2018 [15] 7