Webster 2011.

Methods	A single‐blind randomised controlled trial.
Participants	1231 patients admitted to internal medicine or oncology wards
Interventions	Participants allocated to either of the following. A. Waterlow (n = 411) B. Ramstadius (n = 410) C. Risk assessment using clinical judgement (n = 410)
Outcomes	Incidence of hospital acquired pressure ulcers.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "A computer‐generated randomised list was used."
Allocation concealment (selection bias)	Low risk	Quote: "A phone randomisation method was used."
Blinding of participants (performance bias)	Low risk	Quote: "The patient was blinded to group assignment"
Blinding of personnel (performance bias) All outcomes	High risk	Quote: "The only requirement of staff in the participating wards was to use only the instrument found in the chart".
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Quote: "The outcome assessor was blinded to group assignment."
Incomplete outcome data (attrition bias) All outcomes	Low risk	The number of participants allocated to each group were analysed for the primary outcome.
Selective reporting (reporting bias)	Low risk	The authors report all outcomes alluded to in the paper.
Other bias	Low risk	The study was funded by research grants from the Queensland Nursing Council, the Royal Brisbane and Women’s Hospital Private Practice Fund, the Royal Brisbane and Women’s Hospital Research Foundation and a Queensland Health Nursing Research grant.