Table 1.
Outcomes and measures.
| Measure | Outcome and variables |
|---|---|
| Phase I | |
| Online questionnaire | Interest in trial participation |
| Desk type preferences | |
| Assessment location preferences | |
|
Sociodemographics Age Gender BMI Education Occupational role Income | |
| Phase II | |
| Workspace suitability for full desks and/or desk mounts | |
| Phase III | |
| Delivery time for desks Feasibility of training research staff to install desks Feasibility of trained researcher installing desk mounts Time taken to install each desk Problems associated with desk delivery and installation Feasibility of removing existing desks (applicable only when using full desks) |
Practicalities of delivering and implementing intervention |
| Weekly online diaries | Factors affecting desk use |
| Trial-related outcomes | |
| Behavioural | |
| Individually calibrated combined heart rate and movement sensing (Actiheart CamNtech Ltd.) | Physical activity energy expenditurea |
| Thigh-worn accelerometer (activPAL PAL Technologies Ltd.) | Sitting timea during (a) working hours; (b) all waking hours |
| Standing timea during (a) working hours; (b)all waking hours | |
| Stepping timea during (a) working hours; (b) all waking hours | |
| Sitting patterns: (a) Number of sit-to-stand transitionsa during (i) working hours; (ii) all waking hours | |
| (b) Sitting time accrued in prolonged bouts (≥30 min, ≥60 min)a, during (i) working hours; (ii) all waking hours | |
| Anthropometric and clinical | |
| Portable stadiometer (Leicester Height Measure Mk II) | Height |
| Bio-electrical impedance scale (TBF-300A Total Body Composition Analyzer; Tanita) | Weight and body fat percentage |
| BMI (kg/m2) | |
| Blood pressure monitor (705IT; © OMRON Healthcare Europe B.V.) | Blood pressure |
| Anthropometric tape measure | Waist and hip circumference |
| Non-fasting blood tests | Plasma total cholesterol HDL Triglycerides HbA1C |
| Self-report | |
| Nordic Musculoskeletal Discomfort Questionnaire | Musculoskeletal discomfort |
| Checklist | Health symptoms (headache, neck pain, fatigue, eye strain, back pain, loss of concentration) |
| Work Ability Index | Ability to work |
| Work Performance and Health Questionnaire | Work productivity |
| The Stanford Presenteeism Scale | Presenteeism and absenteeism |
| Brief Job Satisfaction Measure II | Job satisfaction |
| SIT-Q-7d | Domain-specific sedentary behaviour |
| Euro-Quality of Life 5 | Health-related quality of life |
| 4-day estimated food diary | Food and drink intake to assess potential compensation effects in terms of energy intake |
| Phase IV | |
| Qualitative interviews | Acceptability of intervention |
| Acceptability of assessments and burden | |
| Acceptability of study procedures | |
a
Outcomes normalized to an 8-hour workday or a 16-hour waking day, to account for variations in work or waking time schedules and monitor wear time.