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Table 2 Quality assessment based on the NOS for observational studies

From: Robotic versus laparoscopic Gastrectomy for gastric cancer: a systematic review and updated meta-analysis

Author Selection (Out of 4) Comparability (Out of 2) Outcomes (Out of 3) Total (Out of 9)
Pugliese * * * * ** * * * 9
Kim MC * * * * * *    6
Kim KM * * * * * *    6
Son SY * * * * ** *    7
Kang * * * * * *    6
Zhang * * * * ** *    7
Hyun * * * * * *    6
Son T * * * * ** * * * 9
Noshiro * * * * ** *    7
Huang * * * * ** *    7
Zhou * * * * ** * * * 9
Liu * * * * ** *    7
Lee * * * * * * * * 8
Han * * * * ** * * * 9
Park * * * * * *    6
Suda * * * * * *   * 7
Kim HI * * * * * *    6
Shen * * * * ** *    7
Cianchi * * * * * *    6
  1. representativeness of exposed cohort
  2. selection of nonexposed cohort
  3. ascertainment of exposure
  4. outcome not present at the start of the study
  5. assessment of outcomes
  6. length of follow-up
  7. adequacy of follow-up