Study	Reason for exclusion
Aaras 1998	Non‐RCT
Amick 2003	Non‐RCT
Amick 2012	Non‐RCT
Chau 2014	Did not report neck and upper limb musculoskeletal outcome
Danquah 2017	> 25% of the participants reported neck‐shoulder pain at baseline (87/171; 50.9%)
De Cocker 2016	Did not report on neck and upper limb musculoskeletal outcome
Driessen 2008	Participants consisted of workers other than office workers: "Participants are workers, both blue and white collar workers, recruited from the departments of four large Dutch companies with at least 3,000 workers each".
Dropkin 2015	> 25% of the participants had musculoskeletal symptoms at baseline. "Additional inclusion criteria were: work at least 4 h/day on a desktop computer, non‐specific neck/ UE musculoskeletal pain (1 or greater on the pain scale described below) at the time of screening".
Esmaeilzadeh 2014	> 25% of the participants had musculoskeletal symptoms at baseline. Study only included participants with Work‐related upper extremity musculoskeletal symptoms (WUEMSS); " ... case definition criteria, 94 of the 311 respondents had WUEMSS and were subsequently included in the interventional study".
Faucett 2002	Study was not conducted in an office environment
Fostervold 2006	> 25% of the participants had neck and shoulder symptoms at baseline. The prevalence of neck and shoulder symptoms at baseline was 73.5% in the intervention group and 75% in the comparison group.
Ketola 2002	> 25% of the participants had neck and shoulder symptoms at baseline. The study included subjects with musculoskeletal symptoms: "One hundred and twenty‐four subjects with musculoskeletal symptoms were selected".
Krause 2010	Did not report on neck and shoulder musculoskeletal symptoms
Levanon 2012	> 25% of the participants had musculoskeletal symptoms at baseline; "as all the participants have at least 1 part of the UE with complaints of pain at baseline".
Mahmud 2011	> 25% of the participants had musculoskeletal symptoms at baseline. The prevalence for of musculoskeletal disorder at baseline for intervention and control groups ranged from 16.3% ‐ 63.6%.
Mann 2013	> 25% of the participants had musculoskeletal symptoms at baseline; "The inclusion criteria of this study was pain, stiffness or tingling in neck and shoulder in the preceding six months affecting the quality of activities of daily living".
Meijer 2009a	> 25% of the participants had upper extremity musculoskeletal symptoms at baseline. Prevalence for the control group was 49% and 36% for the intervention group.
Meijer 2009b	> 25% of the participants had musculoskeletal symptoms at baseline; 33.3% of the participants have UE complaints at baseline.
Mekhora 2000	> 25% of the participants had musculoskeletal symptoms at baseline; Participants consisted of those with symptoms of above average discomfort: "That is, those with above average discomfort and who had discomfort around the neck and shoulder areas for more than 1 day in the previous year were selected".
Parry 2015	> 25% of the participants had upper extremity musculoskeletal symptoms at baseline. The prevalence of participants reporting musculoskeletal pain in different body regions at baseline ranged from 28‐60%.
Ripat 2006	> 25% of the participants had musculoskeletal symptoms at baseline; "The study population were workers who reported had two or more symptoms of WRUED (i.e. paraesthesia,numbness, loss of strength, shooting sensation or pain, tingling, clumsiness, or night pain)".
Robertson 2013	The intervention was conducted in an laboratory setting, the participants were not performing actual/routine work.
Spekle 2010	> 25% of the participants had musculoskeletal symptoms at baseline; Prevalence of symptoms ‐ 56% , Proximal Symptoms ‐ 46% , Distal Symptoms ‐ 26% at baseline.
Thorp 2014	The intervention was conducted in an laboratory setting, the participants were not performing actual/routine work.

RCT: randomised controlled trial.