Network meta-analysis of urinary retention and mortality after Lichtenstein repair of inguinal hernia under local, regional or general anaesthesia.

Local or general anaesthesia had significantly lower risks of urinary retention than regional anaesthesia. Differences in mortality could not be assessed as there were no deaths after elective Lichtenstein repair. Registration number: CRD42018087115 ( https://www.crd.york.ac.uk/prospero).