Graham 2007.

Methods	Quasi‐randomised controlled trial
Data	Setting: health maintenance organisation, USA. 370 participants were patients aged 18 or over attending the HMO with an acute injury
Comparisons	Investigated the effect of different methods of pre‐screening participants Intervention A: electronic questionnaire on hazardous drinking and willingness to participate in lifestyle intervention Intervention B: oral questionnaire read aloud to patients in the clinic, potential answers printed on cards and patients asked to point Compared to standard self‐completed paper questionnaire
Outcomes	Willingness to take part in a hypothetical trial
Notes
Risk of bias
Item	Authors' judgement	Description
Random Sequence generation ok?	No	Allocated by week
Allocation concealment?	No	See above
Blinding of participants and personnel ok?	Unclear	Potential participants probably blind but not researchers or practice staff
Blinding of outcome assessment ok?	Unclear	Outcome not objective and not clear what influence lack of blinding might have had on this
Incomplete outcome data handled ok?	Yes	Adequate
Free of selective reporting?	Yes	Willingness to take part outcome presented, which is all the review needs
Was the study free of other bias?	No	Hypothetical trial
Overall bias?	Yes	High risk of bias