Sanadgol 2013.

Trial name or title	Creating an artificial night on physiological changes in preterm infants
Methods	Randomised controlled trial
Participants	38 preterm infants (PMA 30‐34 weeks) hospitalised at Ghaem NICU, Iran, were evaluated within 10 days
Interventions	Infants were divided into 2 groups of 1200‐1700 and 1701‐2200 g on the basis of weight, and the weight of each group was randomised into artificial night (dark period from 19:00 to 7:00, during which the incubator was covered with linen cloth and light period was from 7:00 to 19:00 with the cover removed) and a control group (continuous lighting)
Outcomes	Physiologica; changes twice a day, weight & feeding tolerance collected daily
Starting date	April 2012
Contact information	Vajihe Sanadgol, Principal Investigator, Mashhad University of Medical Sciences, Iran
Notes	NCT01833091 ‐ The study has been completed (completion date October 2012)

KMC: kangaroo mother care; NICU: neonatal intensive care unit; PMA: postmenstrual age; ROP: retinopathy of prematurity