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Table 2 Newcastle-Ottawa Scale for risk of bias assessment of the included studies

From: Comparison of the long-term follow-up and perioperative outcomes of partial nephrectomy and radical nephrectomy for 4 cm to 7 cm renal cell carcinoma: a systematic review and meta-analysis

Study Design Selection Comparability Outcome Total
Representativeness of exposed cohort Selective of nonexposed Cohort Ascertainment of exposure Outcome not present at start Assessment of outcome Adequate follow-up length Adequacy of follow-up
Kim R * * * * **   * * 8
Badalato R *   * * **   * * 7
Jang R * * * * * * * * 8
Iizuka R *   * * ** * * * 8
Roos2011 R *   * * ** * * * 8
Roos2012 R *   * *   * * * 8
Crepel R * * * * ** * * * 9
Milonas R *   * * * * * * 7
Thompson R *   * * ** * * * 8
Pignot R *   * * ** * * * 8
Antoneli R *   * * ** * * * 8
Meskawi R *   * * **   * * 7
Weight R * * * * ** * * * 9
Simmoons R *   * * ** * * * 8
Robert R * * * * ** * * * 9
Patard R *   * * **   * * 8
  1. R Retrospective study