Table 1.

Trial summary

Data category	Information
Primary registry and trial identifying number	ISRCTN36257982
Date of registration in primary registry	06/01/2016
Secondary identifying numbers	REC: 17/NE/0093 Funder Reference: 14/42/01
Source(s) of monetary or material support	National Institute for Health Research Health Technology Assessment
Primary sponsor	Newcastle upon Tyne Hospitals NHS Foundation Trust
Secondary sponsor(s)	N/A
Contact for public queries	Miss Nicola Goudie Newcastle Clinical Trials Unit Newcastle University 1–4 Claremont Terrace Newcastle upon Tyne NE2 4AE United Kingdom
Contact for scientific queries	Miss Nicola Goudie Newcastle Clinical Trials Unit Newcastle University 1–4 Claremont Terrace Newcastle upon Tyne NE2 4AE United Kingdom
Public title	Preoperative Behavioural Intervention to Reduce Drinking before elective orthopaedic Surgery
Scientific title	Preoperative Behavioural Intervention to Reduce Drinking before elective orthopaedic Surgery
Countries of recruitment	England
Health condition(s) or problem(s) studied	Preoperative alcohol consumption
Intervention(s)	Intervention: Preoperative Brief Behavioural Intervention to reduce or cease drinking in elective orthopaedic patients Comparator: Treatment as Usual
Key inclusion and exclusion criteria	Ages eligible for study: ≥18 years Sexes eligible for study: both Accepts healthy volunteers: no Inclusion criteria: adult patient (≥ 18 years), listed for primary elective joint (hip or knee) arthroplasty, AUDIT C score ≥ 5 or report consuming 6 units or more in one session at least weekly with the capacity to provide informed written consent and able to write and converse in English Exclusion criteria: Patients likely to undergo sequential joint replacements within the duration of the study, those displaying current (active) withdrawal from alcohol, those with severe psychiatric disorder requiring medical treatment, cognitive impairments or dementia impacting ability to interact with the intervention
Study type	Interventional Allocation: randomised (1:1) Intervention model: parallel assignment Masking: non blinded
Date of first enrolment	N/A
Target sample size	80
Recruitment status	Recruitment to commence June 2017
Primary outcome(s)	Number of patients screened, and the percentages of eligible patients recruited and retained at 6-month follow-up.
Key secondary outcomes	Alcohol consumption: full AUDIT score Health Related Quality of Life: The EQ-5D Major and minor postoperative complications: Clavien-Dindo classification; Postoperative Morbidity Survey (POMS) Joint functionality: Western Ontario and McMaster Universities osteoarthritis index (WOMAC) Functional Assessment score.