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. Author manuscript; available in PMC: 2011 Jun 13.
Published in final edited form as: Cochrane Database Syst Rev. 2009 Apr 15;(2):CD003281. doi: 10.1002/14651858.CD003281.pub3

Characteristics of excluded studies [ordered by study ID]

Study Reason for exclusion
Agarwal 2005 P6 acupoint stimulation not used. Authors used Korean hand acupressure point K-D2 in the study.
Al-Sadi 1997 No sham treatment group used. Control was defined as no intraoperative acupuncture needle at P6 acupoint.
Alkaissi 2005 Patients did not undergo surgery.
Cekmen 2007 P6 acupoint stimulation not used. Authors used transcutaneous electrical nerve stimulation on neck and mastoid area.
Chen 2005 Not randomized controlled trial. First 52 subjects were in the control group (no treatment) and remaining 52 patients were in the acupressure group.
Coloma 2002 Treatment of established postoperative nausea and vomiting.
Dundee 1988 Risk of nausea and vomiting were not reported separately.
Dundee 1991 Two different forms of P6 stimulation (acupuncture + saline, acupuncture + 1% lidocaine). No sham treatment group used.
Fan 1997 Risk of nausea and vomiting were not reported separately.
Fry 1986 No sham treatment group used. Control was defined as no acupressure treatment. Patients did not know that they were in the trial.
Ho 2006 Prevention of intraoperative nausea and vomiting.
Kabalak 2005 Both P6 and CV 13 acupoints used. No treatment was given to the control group.
Khan 2004 Risks of nausea and vomiting were not reported separately.
Kim 2002 Control was defined as an inactive capsicum plaster tape fixed at the Korean hand acupuncture point K-D2 point of both hands.
McMillan 1994 All transcutaneous electrical stimulation at P6 acupoint groups received antiemetics. Risk of nausea and vomiting were not reported separately for placebo transcutaneous electrical stimulation and transcutaneous electrical stimulation groups.
Ming 2002 Stimulation of both P6 and H7 acupoints.
Phillips 1994 No sham treatment group used. No specific details of the type of antiemetic drug used as control.
Schneider 2005 Same study as Streitberger et al (2004). Incidence of postoperative nausea and vomiting were not reported separately.
Schwager 1996 Both P6 and Li4 acupoints stimulated.
Shyr 1990 Control was defined as no acupuncture at P6 acupoint.
Somri 2001 Both P6 and CV13 acupoints used.
Stein 1997 Prevention of intraoperative nausea and vomiting.
Weightman 1987 No sham treatment group used. Control was defined as no acupuncture at P6 acupoint after induction of anaesthesia.
White 2005 This study compared three prophylactic acu-stimulation treatments: preoperative, postoperative, and both preoperative and postoperative. No sham treatment group used for both preoperative and postoperative acu-stimulation.
Windle 2001 Quasi-experimental design. Randomization done on every third patient who agreed to participate and met study criteria. Retrospective chart review was used to estimate the risk of vomiting. Risk of nausea and vomiting were not considered separately, and results were not presented in the paper.
Yentis 1991 No sham treatment group used. Control was no acupuncture treatment at P6 acupoint.
Yentis 1998 This study compared acupuncture given before induction, after induction and in the recovery room. No sham treatment or antiemetic drug group for comparison.