Urda 2016

Methods	Random allocation Single‐blind Study duration: 2 weeks Dropouts: 8% Location: United States Recruitment: not reported
Participants	Population: staff at a United States university in desk jobs Intervention group: 26 participants Control group: 22 participants Demographics: mean age in years: 48 (SD 10) All participants were females Mean BMI: 30.5 (SD 8.2) kg/m2
Interventions	Duration of intervention: 1 week Intervention: audible alert and text message every hour and information on behavioural choices and health risks associated with prolonged sitting Control: no intervention
Outcomes	Outcome name, measurement time/tool (units of measurement) Changes in sitting (hours/ workday) measured at 2 weeks. Transitions in positions measured by activPAL3 accelerometer‐inclinometer Perceived wellness score (scale 3 to 29)
Notes	No conflict of interest reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random assignment included assigning participants by table of random numbers to 1 of 2 groups.
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Group assignment was doubly blinded until the end of week 1, at which time both the participants and the investigator were aware of group assignment. However, Its not for the duration of intervention
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	Low attrition (8%)
Selective reporting (reporting bias)	Low risk	All outcomes mentioned in the method section were reported. Study protocol was not available.
Baseline comparability/ imbalance	Unclear risk	Participants characteristics at baseline not reported
Validity of outcome measure	Low risk	activPAL is a valid instrument for assessing physical activity and sedentary behaviour.