Priebe 2015

Methods	Random allocation Study duration: 13 days Dropout: 32% Location: Canada Recruitment: email sent by human resource personnel on the researchers' behalf to potential participants.
Participants	Population: office workers employed in the head office of one large private company in Canada High personal/high contextual norm (n = 35), high personal/low contextual norm (n = 36), low personal/high contextual norm (n = 35) and low personal/low contextual norm (n = 36) Demographics: Mean age in years: 40.30 (SD 12.02) 66% of participants were females
Interventions	Duration: 10 days High personal/high contextual norm vs. high personal/ ow contextual norm vs. low personal/high contextual norm vs. low personal/low contextual norm
Outcomes	Outcome name, measurement time (units of measurement) Prolonged sitting time (minutes/workday) assessed by self report Standing, walking, and stair use were reported as number of times during the workday assessed by self report
Notes	This work was supported by a Vanier Canada Graduate Scholarship (first author) from the Social Sciences and Humanities Research Council of Canada.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Participants were manually randomly assigned using random number tables to one of four conditions.
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not reported
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	High risk	Very high dropout (32% attrition)
Selective reporting (reporting bias)	Low risk	No protocol. All the outcomes mentioned in the method section were reported.
Baseline comparability/ imbalance	Unclear risk	Not reported
Validity of outcome measure	Unclear risk	Not reported