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Table 4 Risk of bias assessment of randomised controlled studies

From: Human-derived acellular dermal matrix may be an alternative to autologous grafts in tympanic membrane reconstruction: systematic review and meta-analysis

stduy Selection bias Performance bias Detection bias Attrition bias Reporting bias Other bias
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7
Lee 2018 [22] Low risk Unclear risk Unclear risk Unclear risk Low risk Unclear risk Unclear risk
Li 2014 [23] Unclear risk Unclear risk Unclear risk Unclear risk Low risk Unclear risk Unclear risk
Raj 2011 [24] Unclear risk Unclear risk High risk High risk Low risk Unclear risk Unclear risk
Liao 2017 [25] Unclear risk Unclear risk Unclear risk Unclear risk Low risk Unclear risk Unclear risk
  1. Item 1: Random sequence generation;
  2. Item 2: Allocation concealment;
  3. Item 3: Blinding of participants and personnel;
  4. Item 4: Blinding of outcome assessment;
  5. Item 5: Incomplete outcome data;
  6. Item 6: Selective reporting;
  7. Item 7: Bias due to problems not covered by [1] to [6] above