Rush 1990.

Methods	Single centre randomised controlled trial: Blinding of randomisation: Yes, by sealed envelope. Blinding of Intervention: No Blinding of outcome: yes Complete follow‐ up: No, due to culture reports missing or research staff unavailable to abstract data
Participants	473 infants. Sample drawn from 1130 infants consecutively admitted to a newborn nursery. Inclusions: >2500 grams, at least 37 weeks gestation and Apgar at 5 minutes > 7 at 5 minutes. Exclusions: infants initially admitted to the NICU.
Interventions	No gown: No cover gowns were worn by staff or visitors during any infant contact. Gown: Staff and visitors wore cover gowns for all infant contact. In both groups, staff members, parents and visitors continued to be advised to wash their hands carefully before providing patient care. Nasal & umbilical swabs were taken by nursing staff on the 3rd postnatal day or before discharge, whichever was the sooner.
Outcomes	1) Nasal colonisation 2) Umbilical colonisation 3) Colonisation of nose and umbilicus Clarification was requested and received for whether (i) all staff followed the protocol (ii) how infections were diagnosed and when, (iv) clarification of Table 2 and (v) how cost of gowns was estimated
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Single centre randomised controlled trial
Allocation concealment?	Low risk	Blinding of randomisation: Yes, by sealed envelope
Blinding? All outcomes	High risk	Blinding of Intervention: No Blinding of outcome: Yes
Incomplete outcome data addressed? All outcomes	High risk	Complete follow‐up: No, due to culture reports missing or research staff unavailable to abstract data