Younis 1990.

Methods	Randomisation and allocation concealment: no information provided Blinding of outcome assessment: unclear Documentation of exclusion: no loss to follow‐up
Participants	132 women with a twin pregnancy between 30‐32 weeks' gestation were recruited into the study. Women suffering from pregnancy complications affecting time of delivery (e.g. hypertensive disorders, antepartum bleeding, premature uterine contractions) were excluded. Women who delivered before 32 weeks' gestation were also excluded.
Interventions	Women in the intervention group were electively admitted to the hospital from 30‐32 weeks' gestation and if not delivered, until the end of 36 weeks' gestation. Women were allocated into 2 control groups. Instruction to rest at home No activity restriction
Outcomes	Gestational week at delivery Birthweight Low birthweight Mode of delivery (vaginal or caesarean section) Apgar score at 5 minutes Perinatal mortality
Notes	Study design is unclear Chorionicity: not reported Sample‐size calculation: not performed Intention‐to‐treat analyses: performed Compliance: no information provided Location: single centre in Jerusalem, Israel Timeframe: November 1979‐October 1986