Kashanian 2010.

Methods	Single‐blind randomised controlled trial of acupressure at SP6 or light touch control group.
Participants	120 women. Inclusion criteria: age: 18‐35 years, nulliparous, singleton, cephalic presentation, gestational age 37‐41 weeks, intact membranes, cervical dilation 3 cm to 4 cm, established contractions (> 3:10 minutes 45‐60 seconds duration). Exclusion criteria: any sedation during labour, abnormal or deceased fetus, fetal distress, meconium passage, previous hysterotomy or uterine scar, any medical or surgical complications of pregnancy, drug use except usual supplements, vaginal bleeding and high‐risk pregnancy.
Interventions	Acupressure, performed by investigator, at SP6 during contractions for a total acupressure time of 30 minutes. Control: touch at SP6, performed by same investigator, for same duration of time.
Outcomes	Severity of pain as measured by VAS, duration of active phase of labour, mode of birth, use of oxytocin, neonatal weight, and Apgar scores.
Notes	Study duration: March to September 2007. Funding: the research was supported by Iran University. Conflict of interest: not stated. Setting: labour ward at Akbaradi teaching hospital, Iran. Country: Iran.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	4 part block randomisation method (seems to be computer generated).
Allocation concealment (selection bias)	Low risk	Sealed envelopes.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	It was possible to blind participants. Treatment was known and administered by the investigator.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Outcome assessor was blinded to treatment group.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No discussion of loss of participants at data collection points. No discussion of exclusions after randomisation but exclusion criteria of any sedation during labour or any sign of fetal distress could indicate exclusion after randomisation.
Selective reporting (reporting bias)	Unclear risk	The study protocol was unavailable.
Other bias	Low risk	No imbalances at randomisation.