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Table 1 NOS scale for observational studies

From: Robotic versus laparoscopic surgery for rectal cancer in male urogenital function preservation, a meta-analysis

Study Selection Comparability Outcome assessment Score
1 2 3 4 5, 6 7 8 9  
D’ Annibale 2013 * * * * *, * * * * 9
Panteleimonitis 2016 * * * * *, 0 * * * 8
Park 2014 * * * * *, * * * * 9
Kim 2012 * * * * *, * * * * 9
  1. Explanation
  2. 1: Adequate definition of the cases, study-enrolled cases with independent validation. (yes, *; no or not reported, 0)
  3. 2: Representative of the cases, consecutive or obviously representative cases. (yes, *; no or not reported, 0)
  4. 3: Selection of controls, community controls. (yes, *; no or not reported, 0)
  5. 4: Clear definition of the controls, no previous history of the same procedure. (yes, *; no or not reported, 0)
  6. 5: Comparability of cases and controls on the basis of the design or analysis, the patients baseline characteristics were similar between different groups. (yes, *; no or not reported, 0)
  7. 6: Comparability of cases and controls for other factors, the same type of procedure, the same surgical team to perform the procedure. (yes, *; no or not reported, 0)
  8. 7: Ascertainment of exposure, complete surgical records. (yes, *; no or not reported, 0)
  9. 8: Same method of ascertainment for cases and controls. (yes, *; no or not reported, 0)
  10. 9: Adequacy of follow up of cohorts (yes, *; no or not reported, 0)