Schleussner 2001.

Methods	Randomised. No blinding. No mention of power calculation or intention‐to‐treat analysis.
Participants	50 pregnant women between 27 and 35 weeks. Germany.
Interventions	1. GTN patches 0.4‐0.8 mg/hr (n = 28). 2. Fenoterol 60‐120 micrograms/hr (n = 22).
Outcomes	Primary outcomes were prolongation of pregnancy and neonatal outcome. Secondary outcomes were cervical ripening and maternal adverse effects.
Notes	Only abstract available in English. No information on whether women got steroids and/or antibiotic therapy.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Allocation by hospital number.
Allocation concealment (selection bias)	High risk	Allocation on basis of hospital number.
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding. Different treatment regimens.
Blinding of outcome assessment (detection bias) All outcomes	High risk	No blinding. Different treatment regimens.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not clear.
Selective reporting (reporting bias)	Unclear risk	Assessment from translated notes.
Other bias	Unclear risk	Assessment from translated notes.