title: Confidence with confidence intervals.
authors.forename: M O
authors.initials: MO
authors.lastname: Columb
authors.forename: H E
authors.initials: HE
authors.lastname: Thomson
mesh_terms: D000577:Amides; D000698:Analgesia / Q000379:methods*; D000779:Anesthetics, Local; D002045:Bupivacaine / Q000031:analogs & derivatives; D016001:Confidence Intervals; D006801:Humans; D000077554:Levobupivacaine; D011182:Postoperative Care / Q000379:methods; D000077212:Ropivacaine
chemical_list: D000577:Amides; D000779:Anesthetics, Local; D000077212:Ropivacaine; D000077554:Levobupivacaine; D002045:Bupivacaine