Tang 2005.

Methods	Computer‐generated randomisation sequence; sealed, sequentially numbered treatment packs, which were filled and labelled in accordance with the list of randomisation.
Participants	118 women (group I: 58, group II: 60) Inclusion criteria: >18 years, 12‐20 weeks gestation. Exclusion criteria: regular use of prescription drugs, IUD in utero, nursing mothers, multiple pregnancies, heavy smokers.
Interventions	all: mifepristone 200mg orally, 36‐48h later: Group 1: misoprostol 400 μg sublingual and 2 placebo tablets orally every 3 hrs, max 5 d; Group 2: misoprostol 400 μg orally and 2 placebo tablets sublingually every 3 hrs, max 5 d.
Outcomes	Primary outcome: success rate at 24 h. Secondary outcomes: induction‐to‐abortion interval, side‐effects.
Notes	Definition of abortion: not specified. If the placenta was incomplete, evacuation of the uterus was performed. No major complications occurred.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ adequate
Blinding? All outcomes	Low risk	Blinding for participants and clinicians.
Free of other bias?	Low risk	No statistically significant differences between the groups in terms of maternal age, gestational age and parity.