Study	Reason for exclusion
Aadahl 2015	Not conducted in a workplace setting. Did not report workplace sitting, only total sitting.
Adams 2012	Not all the participants were working. Did not report workplace sitting as a separate outcome. Total sitting time reported.
Aittasalo 2004	Did not report workplace sitting as a separate outcome. Sitting time reported separately for working days and non‐working days but the working days included both work and leisure time.
Alderman 2014	Not RCT or CBA. Did not report workplace sitting.
Arrogi 2017	Did not report workplace sitting
Audrey 2015	Not conducted in a workplace setting.
Barbieri 2017	Did not report workplace sitting
Ben‐Ner 2014	Did not report data on sitting time at work separately. Daily sitting time (during waking hours) was measured with an accelerometer but it included both work and leisure time.
Berberien 2016	Not RCT or CBA.
Biddle 2015	Not conducted in a workplace setting.
Bird 2014	Not RCT or CBA.
Bjorklund 2015	Did not report workplace sitting
Boreham 2005	This was a stair‐climbing training study that took place during working hours, but sitting time was not assessed.
Bouchard 2015	Not RCT or CBA.
Brown 2012	Did not report workplace sitting.
Buchholz 2016	Not RCT or CBA.
Carr 2013	No data reported for sitting time at work. Daily sedentary time (criterion: 0 steps/minute) was measured with StepWatch (accelerometer attached on ankle), but it included both work and leisure time (the monitor was kept during all wakeful hours for 7 consecutive days). Correspondence with the author was unclear regarding the distinction between work and leisure in sitting time. It is also not clear what the StepWatch measures as an accelerometer.
Carter 2015	Not RCT or CBA. Does not describe a full working day.
Chae 2015	Not RCT or CBA (pre‐post design). All the participants did not complete the program.
Cheema 2013	Did not report workplace sitting.
Chia 2015	Did not report workplace sitting. Following correspondence with authors they replied: "We did not specifically measure sitting time but had an indication of the time spent in the office (these are desk bound participants‐ when they filled in the questionnaire of alertness by the hour (0900‐1700hrs)".
Cifuentes 2015	Not RCT or CBA.
Clemes 2014	Not RCT or CBA. Pedometers were used to record sitting time and step counts.
DeCocker 2015	Not RCT or CBA.
Dewa 2009	Did not report workplace sitting. Sitting time was assessed (IPAQ) but it included both work and leisure time.
Elmer 2014	Not RCT or CBA. Outcome is energy expenditure not time spent sitting at work.
Engelen 2017	Not RCT or CBA.
Fennell 2017	Did not report workplace sitting
Foley 2016	Not RCT or CBA.
Freak‐Poli 2011	Not an RCT or CBA. Workplace sitting not reported. Sitting time was questioned separately for weekdays and weekend days but it included both work and leisure.
Ganesan 2016	Did not report workplace sitting
Gardner 2015	Not conducted in a workplace setting.
Gilson 2012	Not an RCT or CBA. Did not report workplace sitting.
Gilson 2015	Not RCT or CBA.
Gilson ND 2012	Not an RCT or CBA.
Gorman 2013	Not an RCT or CBA.
Green 2016	Not RCT or CBA.
Grunseit 2012	Not an RCT or CBA.
Hadgraft 2017	Did not report workplace sitting
Hedge 2004	Sitting time was not reported in hours (only %). The length of intervention was not the same for everybody (no detailed information, stated “4‐6 wks”).
Irvine 2011	Not an RCT or CBA. No quantitative data on sitting time at work.
Jancey 2016	Not RCT or CBA.
John 2011	Not an RCT or CBA. Did not report workplace sitting. Daily sitting time (waking hours) was measured with an accelerometer, but it included both work and leisure time.
Jones 2017	Did not report workplace sitting
Júdice 2015	Did not report workplace sitting, only total sitting time.
Kennedy 2007	Did not report workplace sitting.
Kerr 2016	Not conducted in a workplace setting.
Koepp 2013	Not an RCT or CBA.
Lara 2008	Not an RCT or CBA. Did not report workplace sitting.
Liu 2016	Not RCT or CBA.
Maeda 2014	Not RCT or CBA. Participants were university students.
Mahmud 2015	Did not report workplace sitting
Mainsbridge 2014	Did not report workplace sitting.
Mair 2014	Did not report workplace sitting.
Marshall 2003	Did not report workplace sitting. Sitting time was assessed (IPAQ, short version) but it included both work and leisure time (reported as ‘weekday sitting time’).
McAlpine 2007	Not a normal working day, but an experimental office facility. Not an RCT or CBA.
Miyachi 2015	Did not report workplace sitting.
NCT01221363	Following correspondence with the authors, they replied: "Ours is not a work place intervention study, but a 'total sitting time' community‐based intervention study where the individual behavioural intervention addresses all domains of life, i.e. leisure time, work, transportation etc. Approximately 1/3 of participants are not working (retired or unemployed) and those who do work, do not necessarily have sedentary work, since our main inclusion criterion was minimum 3.5 hours of leisure time sitting/day. Consequently our primary outcome measure is objectively measured total daily sitting time (activPAL), and we only have rather crude self‐report measures on sitting time at work."
Ognibene 2016	Did not report workplace sitting
Opdenacker 2008	Did not report workplace sitting. Sitting time was assessed (IPAQ) but it included both work and leisure time.
Ouyang 2015	Not conducted in a workplace setting. Participants were sedentary overweight females.
Parry S 2013	Did not report workplace sitting. Reported sedentary time measured by accelerometer. Sedentary time was defined as an activity having less than 100 counts on an accelerometer.
Pilcher 2017	Did not report workplace sitting
Poirier 2016	Did not report workplace sitting
Pronk 2012	Not an RCT or CBA.
Roossien 2017	Not RCT or CBA.
Schwartz 2016	Did not report workplace sitting
Slootmaker 2009	Did not report workplace sitting. Daily sitting time (waking hours) was measured with an accelerometer, but it included both work and leisure time.
Sternfeld 2009	Did not report workplace sitting. Sedentary time assessed during leisure.
Straker 2013	Not an RCT or CBA.
Taylor 2016	Did not report workplace sitting
Thogersen‐Ntoumani 2013	Did not report workplace sitting.
Thompson 2014	Did not report workplace sitting. The authors used accelerometers, but converted their results into energy expenditure/day (no separation between work and leisure time).
Thorp 2015	Outcome is energy expenditure not time spent sitting at work.
Torbeyns 2016	Did not report workplace sitting
Torbeyns 2017	Not RCT or CBA.
Tucker 2016	Did not report workplace sitting
vanNassau 2015	Not RCT or CBA.
Wirick 2016	Not conducted in a workplace setting.
Yancey 2004	Did not report workplace sitting.
Østerås 2005	Not an RCT or CBA.

Abbreviations

CBA: controlled before‐and‐after study IPAQ: International physical activity questionnaire RCT: randomised controlled trial