Evaluation of the Dynamic Work Intervention for Office Workers to Reduce Sedentary Behaviour

Study Overview
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Brief Summary
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Long-term sitting has been associated with multiple health risks. To reduce sitting time for office workers in a Dutch insurance company, an intervention will be implemented. The goal of this study is to evaluate this intervention on the short term (3 months) and long-term (12 months).

Detailed Description
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Large volumes of sitting time have been associated with multiple health risks such as diabetes, heart disease and premature death. Especially, in office workers sitting time per day can accumulate to over 10 hours a day. To reduce sitting time for office workers in a Dutch insurance company, an intervention will be implemented. The intervention contains the introduction of alternative workstations, intervention sessions with an occupational physiotherapist and an activity tracker with a self-help program booklet. The goal of this study is to evaluate the (cost) effectiveness of this intervention on the short term (3 months) and long-term (12 months). The primary outcome is objectively assessed sitting time. In a cluster randomized controlled trial 250 employees of an insurance company will participate in the study. After baseline measurements, matched departments will be randomly assigned to the control or intervention group. The evaluation includes an economic and process evaluation.

Official Title
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Evaluation of the Dynamic Work Intervention for Office Workers to Reduce Sedentary Behaviour

Conditions
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Lifestyle-related Condition

Intervention / Treatment
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* Other: Dynamic Work


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Employed by the insurance company for at least the duration of the study (12 months) Employed at least 28 hours per week Employed at one of the participating departments Exclusion Criteria: Already access to the Dynamic Working Intervention Unable to stand or walk for longer time periods (i.e. wheelchair bound) Pregnancy

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Cluster randomized controlled trial
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Intervention group<br>Participants in the intervention group will receive the Dynamic Working Intervention program, as described in the next section. | Other: Dynamic Work<br>* The intervention consists of the introduction of sit-stand workstations and desk bikes in the participants work environment in a ratio of 1:2 with traditional desks and chairs. Employees will receive a half hour intervention session at the start of the intervention from an occupational physiotherapist, who will provide further intervention support in the ensuing 12 weeks. Intervention participants will also receive an activity tracker which provides feedback on sitting time and physical activity levels.<br>* Other names: Dynamisch Werken;|
| No Intervention: Control group<br>Participants in the control group will not receive any intervention and will perform their work in the same manner as before. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sitting time | Total sitting time will be measured objectively with the activPAL activity tracker | Change in sitting time between baseline and 12 month follow up assessment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Occupational sitting time | Objectively assessed by the activPAL activity tracker, occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Non-occupational sitting time | Objectively assessed by the activPAL activity tracker, non-occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Total standing time | Objectively assessed by the activPAL activity tracker | Assessed at baseline 3 months and 12 months | 
| Occupational standing time | Objectively assessed by the activPAL activity tracker, occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Non-occupational standing time | Objectively assessed by the activPAL activity tracker, non-occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Total stepping time | Objectively assessed by the activPAL activity tracker | Assessed at baseline 3 months and 12 months | 
| Occupational stepping time | Objectively assessed by the activPAL activity tracker, occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Non-occupational stepping time | Objectively assessed by the activPAL activity tracker, non-occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Sitting time in bouts of 30 min | Objectively assessed by the activPAL activity tracker | Assessed at baseline 3 months and 12 months | 
| Occupational sitting time in bouts of 30 min | Objectively assessed by the activPAL activity tracker, occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Non-occupational sitting time in bouts of 30 min | Objectively assessed by the activPAL activity tracker, non-occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Sitting time in bouts of 60 min | Objectively assessed by the activPAL activity tracker | Assessed at baseline 3 months and 12 months | 
| Occupational sitting time in bouts of 60 min | Objectively assessed by the activPAL activity tracker, occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Non-occupational sitting time in bouts of 60 min | Objectively assessed by the activPAL activity tracker, non-occupational time will be recorded and linked with a diary | Assessed at baseline 3 months and 12 months | 
| Waist circumference and body height | Waist circumference and body height will be objectively measured in cm | Assessed at baseline 3 months and 12 months | 
| Body weight | Body weight will be objectively measured in kg and used to calculate body mass index (BMI) | Assessed at baseline 3 months and 12 months | 
| Individual Work Performance | Will be assessed with the Individual Work Performance Questionnaire (IWPQ) | Assessed at baseline 3 months and 12 months | 
| Need for recovery | This will be assessed with the Need For Recovery (NFR) questionnaire | Assessed at baseline 3 months and 12 months | 
| Effort-reward imbalance | This will be assessed with the short Effort-Reward Imbalance (ERI-short) questionnaire | Assessed at baseline 3 months and 12 months | 
| Musculoskeletal complaints | This will be assessed with the Nordic Musculoskeletal questionnaire | Assessed at baseline 3 months and 12 months | 
| Vitality | This will be assessed with the Vita-16© TNO questionnaire | Assessed at baseline 3 months and 12 months | 
| Quality of life measured with EQ-5D-5L | This will be assessed with the EQ-5D-5L questionnaire | Assessed at baseline 3 months and 12 months | 
| Absenteeism | This will be self-reported as well as assessed with company records | Assessed at baseline 3 months and 12 months | 
| Healthcare consumption | This includes general practitioner, allied health professionals, complementary medicine consumption | Assessed at 3 months and 12 months | 
| Sitting, physical activity and work related outcomes | These will be assessed with custom sitting, physical activity and work questions | Assessed at baseline 3 months and 12 months | 
| Process evaluation | A process evaluation will be performed using qualitative (focus group interviews) and quantitative methods (questionnaires) in order to determine the level of implementation of the intervention as well as barriers and facilitators of this implementation. | Assessed at 3 months and 12 months |