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. 2012 Apr 18;2012(4):CD001543. doi: 10.1002/14651858.CD001543.pub4

Hetzer 1999.

Methods Multicenter, two arms RCT of Shouldice vs Lichtenstein. 
 Randomization: Day of intervention. Allocation concealment inadequate. 
 Maximum follow up: 3 months. 
 Exclusions after randomizations: 562 hernias (randomizations performed before evaluation of inclusion criteria). 
 Analyses by protocol. 
 Losses to follow up: none. 
 Jadad quality score: 1.
Participants Country: Switzerland. 
 Setting: centres not specialized in hernia repair. 
 Total enrolled patients (two arms): 385 patients; number of hernias: 410 (171 Shouldice vs 239 Lichtenstein). 
 Mean age (SD): Shouldice 53 (16,77); Lichtenstein 58 (17,36). 
 Gender: 385 M. 
 Inclusion criteria: age>18, primary inguinal hernia, elective repair. 
 Exclusion criteria: incarcerated hernia, previous operation in the inguinal region, coagulopathy, diabetes, prostatic hyperplasia, wish for general anaesthesia. 
 Demographic and baseline data reported: comparability for age, type of hernia(all data reported).
Interventions Shouldice Standard (n=171). 4 layers. PDS 2/0. 
 Lichtenstein (n=239). Polypropylene meshes. Polypropylene 2/0.
Outcomes Lenght of postoperative stay. 
 Wound Infection. 
 Duration of operation.
Notes Conflict of interest: not reported. 
 Sources of funding: not reported.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) High risk C ‐ Inadequate