Methods	Randomised.
Participants	897 patients presenting for antenatal fetal monitoring.
Interventions	Non-stress test compared with FAS test (monitoring for 5 minutes)
Outcomes	Number of reactive tests, number of stimuli needed to achieve reactive test, antenatal fetal death
Notes
Risk of bias
Bias	Authors’ judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomisation by lottery.
Allocation concealment (selection bias)	High risk	None.
Blinding of participants and personnel (performance bias) All outcomes	High risk	None.
Blinding of outcome assessment (detection bias) All outcomes	High risk	None.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unclear from tables whether data from all participants included in the analyses
Selective reporting (reporting bias)	Low risk	All outcomes appear to have been reported upon.
Other bias	Unclear risk	No baseline characteristics table - mean parity of each group was similar