Schuna 2014

Methods	Random allocation Single blind Study duration: 3 months Drop outs: 24% Location: USA Recruitment: in‐house distribution of print and electronic media. Potential participants received an e‐mail providing a link to an online survey that included a series of screening questions designed to assess participant eligibility.
Participants	Population: pool of 728 Overweight/obese and sedentary employees at a single office Intervention group: 15 participants Control group: 16 participants Demographics: mean age: Intervention 40 (SD 9.5) years Control 40.3 (SD 10.9) years only one male participant and 40 female participants BMI: Intervention 36.1 (SD 8.7) kg/m², control 35.6 (SD 8.2) kg/m²
Interventions	Duration of intervention: 3 months Intervention: Treadmill desk plus counselling Control: no intervention
Outcomes	Outcome name, measurement time/tool (units of measurement) Physical activity (minutes/hour) and sedentary behavior (minutes/hour) measured by accelerometer‐inclinometer, body mass, body fat percentage, and BMI
Notes	This research was supported by Blue Cross and Blue Shield of Louisiana.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Following correspondence with authors, they replied: "Statisticians generated a random list."
Allocation concealment (selection bias)	Low risk	Following correspondence with authors, they replied: “The randomisation codes were sealed in envelopes with randomisation numbers.”
Blinding of participants and personnel (performance bias) All outcomes	High risk	Following correspondence with authors, they replied: “Participants were not blinded. Intervention personnel and Project Manager were not blinded.”
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Sitting, step counts, Physical activity and sit‐to‐stand transitions were measured using thigh‐mounted accelerometer‐inclinometers, so misreporting of these activities was not possible.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Does not appear to have attrition bias.
Selective reporting (reporting bias)	High risk	The trial registry mentions a follow‐up of 6 months but the study reports only 3 months' follow‐up.
Baseline comparability/ imbalance	Low risk	Age, sex and occupation were similar in both the intervention group and the control group at baseline.
Validity of outcome measure	Low risk	The accelerometer is a valid instrument for the measurement of sitting time.