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Table 3 Newcastle–Ottawa quality assessments scale

From: The value of miR-155 as a biomarker for the diagnosis and prognosis of lung cancer: a systematic review with meta-analysis

First authorYearQuality indicators from Newcastle–Ottawa ScaleScores
12345678
Raponi [28]20097
Saito [29]20118
Yi G [30]20147
Voortman [31]20106
Donnem [32]20116
Sanfiorenzo [33]20138
Xue [34]20167
  1. 1. Representativeness of the exposed cohort; 2. Selection of the non-exposed cohort; 3. Ascertainment of exposure; 4. Outcome of interest not present at start of study; 5. Control for important factor or additional factor; 6. Assessment of outcome; 7. Follow-up long enough for outcomes to occur; 8. Adequacy of follow up of cohorts