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Table 1 Risk of bias summary: review authors’ judgements about each risk of bias item for each included study

From: Should we abandon regional anesthesia in open inguinal hernia repair in adults?

Publication year Author Randomization Allocation Blinding of patients and medical personnel Blinding of outcome assessment Incomplete outcome data Selective reporting Other bias
1981 Godfrey 1 1 1 1 3 3 2
1990 Tverskoy 3 1 3 1 3 3 3
1993 Merhav 3 3 1 1 1 3 2
2002 Ozgun 3 1 1 1 3 3 3
2004 Burney 3 3 1 1 1 3 3
2007 Srivastava 1 1 1 1 3 3 3
2009 Varshney 1 1 1 1 1 3 3
  1. 1 = high risk, 2 = unclear risk, 3 = low risk