Haines 2010.

Methods	Cluster randomised trial. 18 wards matched into pairs on the basis of their pre‐intervention fall rates. Randomised with a coin toss. No blinding. 1 ward ceased using the intervention after 3 of the intended 6 months. Data were included from the one ward that ceased using the intervention and that of its matched pair ward for the same time period in the intention to treat analysis.
Participants	Setting: 18 publicly funded hospital wards in Queensland, Australia with no previous access to the intervention. N: admissions (occupied bed days) 22,036 (131,805) Inclusion criteria: all admissions. Exclusion criteria: nil.
Interventions	One "low‐low" (28.5‐64cm height) bed for every 12 regular beds per ward. Control group received standard care.
Outcomes	Falls were recorded by staff as incident reports. Frequency of falls in the bedroom; Frequency of all falls; Frequency of injuries due to all falls; Frequency of head injuries; Frequency of fractures.
Notes	No significant difference in outcomes demonstrated.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Coin tossing.
Allocation concealment (selection bias)	Low risk	Central allocation.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Missing outcome data balanced in intervention and control group and unlikely to be introducing bias.
Selective reporting (reporting bias)	Unclear risk	The study protocol was not available.
Other bias	Low risk	The study appears to be free of other sources of bias.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Staff were not blinded to ward allocation; participants were not blinded to the intervention.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Staff who recorded falls were not blinded to the ward allocation status.