Tobin 2016

Methods	Random allocation Single‐blind Study duration: 5 weeks Dropouts: 29% Location: Australia Recruitment: participants were recruited via an email sent to all staff working in the study locations
Participants	Population: participants were recruited from four locations across two organisations. The organisations were a non‐government organisation and a university. All locations were office‐based environments. Intervention group: 26 participants Control group: 26 participants Demographics: mean age in years: intervention 34.8 (SD 10.5), control 34.3 (SD 8.9) % female participants: intervention 89%, control 84%
Interventions	Duration of intervention: 5 weeks Intervention: sit‐stand desk + instructions/ergonomic assessment Control: no intervention
Outcomes	Outcome name, measurement time/tool (units of measurement) Changes in sitting/standing/stepping time (minutes/8‐hour workday) measured at 5 weeks. Transitions in positions measured by activPAL3 accelerometer‐inclinometer Self‐reported mental health‐ and physical health outcomes
Notes	This study was funded by Healthway (File No: Healthway Promotion Research Agreement 24008). The sit‐stand workstations were supplied by Ergotron (www.ergotron.com). Authors had no conflicts of interest to report
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported (only use the word randomised, no protocol to check)
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Participants were probably aware of allocation because of self evident nature of intervention.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	Similar proportions of participants were missing from final analysis in both groups.
Selective reporting (reporting bias)	Low risk	All outcomes mentioned in the method section were reported. Study protocol was not available.
Baseline comparability/ imbalance	Low risk	Participants in control and intervention groups were comparable in age, sex, BMI and education at baseline.
Validity of outcome measure	Low risk	activPAL is a valid instrument for assessment of physical activity and sedentary behaviour