Inglis 1995.

Study characteristics
Methods	RCT
Participants	40 women Inclusion criteria: women who presented for elective CS at term with a singleton pregnancy receiving spinal anaesthesia Exclusion criteria: women less than 150 cm in height, more than 170 cm in height, or whose babies showed evidence of fetal compromise
Interventions	Right lateral position versus sitting position during spinal anaesthesia Group 1: right lateral (when anaesthesia induced) Group 2: sitting (when anaesthesia induced) All women received a preload of IV Hartmann's solution (1000 mL), a standardised spinal anaesthetic technique and dose, and standardised surgical positioning.
Outcomes	Maternal: hypotension; nausea and vomiting; time to block; women's satisfaction; ephedrine requirements
Notes	Hypotension was defined as systolic pressure decreased to < 70% of baseline or < 100 mmHg.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"Randomly allocated" – method not described
Allocation concealment (selection bias)	Unclear risk	Method not described
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Block assessed by an investigator who was unaware of the women's original position
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	2 from lateral group removed from study (in 1, the spinal needle could not be inserted in the lateral position, but was successfully placed in the sitting position and for the other, a repeat block was needed)
Selective reporting (reporting bias)	Low risk	None apparent
Other bias	Low risk	None apparent