title: Conflicting results in clinical research: is the proof in the P value, the study design, or the pudding?
authors.forename: Brian M
authors.initials: BM
authors.lastname: Ilfeld
authors.forename: Edward R
authors.initials: ER
authors.lastname: Mariano
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Neal
mesh_terms: D000698:Analgesia / Q000379:methods*; D000701:Analgesics, Opioid / Q000627:therapeutic use; D000775:Anesthesia, Spinal; D000779:Anesthetics, Local / Q000008:administration & dosage*; D016118:Anterior Cruciate Ligament / Q000601:surgery; D002045:Bupivacaine / Q000008:administration & dosage / Q000031:analogs & derivatives; D004334:Drug Administration Schedule; D005267:Femoral Nerve; D006801:Humans; D000077554:Levobupivacaine; D009407:Nerve Block; D010147:Pain Measurement; D010149:Postoperative Pain / Q000517:prevention & control*; D020250:Postoperative Nausea and Vomiting / Q000517:prevention & control*; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D012107:Research Design; D012189:Retrospective Studies; D012890:Sleep / Q000187:drug effects; D016896:Treatment Outcome
chemical_list: D000701:Analgesics, Opioid; D000779:Anesthetics, Local; D000077554:Levobupivacaine; D002045:Bupivacaine