VolunteersSIVAStressNCT04040608
Influence of Screen Sizes on Responses to Visual Analog Scales of Stress
An observational study of Volunteers, run by University Hospital, Clermont-Ferrand at 1 site in France.
Trial summary
Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Volunteers
- What is being tested?
- Influence of screen sizes on responses to visual analog scales of stress
- Type of treatment
- Pill or oral medicine
- How many people
- 200 participants
- Where
- 1 siteFrance
- Study dates
- 2 Mar 2021to Mar 2028
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: healhy volunteers
Who may be able to join
- Adult persons
Who cannot join
- Refusal to participate in the study
- Unable to answer basic questions (difficulties understanding, cognitive disorders…)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
France1 site, 1 recruiting
- Recruiting
Chu Clermont Ferrand
Clermont-Ferrand, 63003
Lise Laclautre, promo_interne_drci@chu-clermontferrand.fr
Frédéric DUTHEIL
About this study
Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.
Read the detailed description
Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.
Primary objective is to study the influence of screen sizes on response responses to visual analog scales.
Secondary objectives are to assess:
- the variability of responses depending on screen sizes within a week
- the influence of perception of work and addiction to work on the variability depending on screen sizes
- relationships with biomarkers of stress : salivary DHEAS, heart rate variability and skin conductance
An open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires.
The participant will undergo the same examination within a week (15 minutes).
- Conditions
- Volunteers
- Being tested
- Influence of screen sizes on responses to visual analog scales of stress
- Keywords
- visual analog scale, stress
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Influence of screen sizes on responses to visual analog scales of stressOther
An open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires.
The participant will undergo the same examination within a week (15 minutes).
| Study group | Role | What they receive |
|---|---|---|
| experimental group | differences in responses to visual analog scales depending on screen sizes Receives: Other: Influence of screen sizes on responses to visual analog scales of stress |
What is being measured
The primary outcome is the main question the study is designed to answer.
Visual analog scale to assess the perceived stress
Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Measured: day 0
Visual analog scale to assess the perceived stress
Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Measured: day 7
Secondary outcomes (11)
Visual analog scale to assess anxiety
Visual analog scale to assess anxiety on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Measured: day 0, day 7
Visual analog scale to assess sleep quality
Visual analog scale to assess sleep quality on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Measured: day 0, day 7
Visual analog scale to assess fatigue
Visual analog scale to assess fatigue on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Measured: day 0, day 7
Job Demand-Control-Support (JDSC) questionnaire of Karasek
The Job Demand-Control-Support (JDSC) questionnaire of Karasek assessed job demands, job control and social support through 26 items.
Measured: day 0, day 7
The Effort-Reward Imbalance Questionnaire (ERI)
The Effort-Reward Imbalance Questionnaire (ERI) is a self-administrated test assessing psychological distress and health problems that may occur when there is an imbalance between the efforts required by the work and the rewards received.
Measured: day 0, day 7
The Work Addiction Risk Test (WART)
The Work Addiction Risk Test (WART) was developed by Robinson et al. from symptoms reported by clinicians caring for patients with work addiction
Measured: day 0, day 7
Hospital Anxiety and Depression (HAD) Scale
Hospital Anxiety and Depression (HAD) Scale is a self-reported questionnaire composed of 14 items with a 4-point Likert scale assessing anxiety (7 items) and/or depressive (7 items) symptoms
Measured: day 0, day 7
The Maslach Burn-out Inventory (MBI)
The Maslach Burn-out Inventory (MBI) is composed of 22 items designed to assess the three components of the burn-out syndrome: emotional exhaustion (9 items), depersonalization (5 items) and reduced personal accomplishment (8 items)
Measured: day 0, day 7
Heart rate variability
Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy
Measured: day 0, day 7
: skin conductance
Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy
Measured: day 0, day 7
Salivary DHEAS
Salivary DHEAS is a biomarker of chronic stress, with a long half-life of 16 hours
Measured: day 0, day 7
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted31 Jul 2019
- Study start2 Mar 2021
- Primary completionMar 2028 (estimated)
- Study completionMar 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for VolunteersStudies of the same condition, open and under way.
- More trials run by University Hospital, Clermont-FerrandThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 200 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University Hospital, Clermont-Ferrand
- Sponsor type
- University, hospital or other
- Collaborators
- Institut de Médecine du Travail, UMR CNRS 6024, LaPSCo
- Responsible party
- Sponsor
- Investigators
- frédéric Dutheil, Principal investigator, University Hospital, Clermont-Ferrand
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04040608
- Sponsor's protocol ID
- RNI 2018 DUTHEIL 3
- Other IDs
- 2018-A03280-55
- Acronym
- SIVAStress
- Status last verified
- Feb 2026
- First submitted
- 26 Jul 2019
- Last updated
- 12 Feb 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 12 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Influence of Screen Sizes on Responses to Visual Analog Scales of Stress
- ClinicalTrials.gov ID
- NCT04040608
- Acronym / sponsor ID
- SIVAStress / RNI 2018 DUTHEIL 3
- Conditions
- Volunteers
- Keywords
- visual analog scale, stress
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 200 participants (estimated)
- Lead sponsor
- University Hospital, Clermont-FerrandUniversity, hospital or other
- Collaborators
- Institut de Médecine du Travail, UMR CNRS 6024, LaPSCo
- Study start
- 2 Mar 2021 (actual)
- Primary completion
- Mar 2028 (estimated)
- Study completion
- Mar 2028 (estimated)
- First posted
- 31 Jul 2019 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.
Detailed description
Visual analog scales (VAS) are one of the most common tools used in questionnaires. VAS are validated for pain and stress for example on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100). Nowadays, most VAS are used on questionnaires on internet. However, the influence of screen sizes on responses to visual analog scales were never studied.
Primary objective is to study the influence of screen sizes on response responses to visual analog scales.
Secondary objectives are to assess:
- the variability of responses depending on screen sizes within a week
- the influence of perception of work and addiction to work on the variability depending on screen sizes
- relationships with biomarkers of stress : salivary DHEAS, heart rate variability and skin conductance
An open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires.
The participant will undergo the same examination within a week (15 minutes).
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| experimental group | – | Other: Influence of screen sizes on responses to visual analog scales of stressdifferences in responses to visual analog scales depending on screen sizes |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- healhy volunteers
Key inclusion criteria (1 listed)
- Adult persons
Key exclusion criteria (2 listed)
- Refusal to participate in the study
- Unable to answer basic questions (difficulties understanding, cognitive disorders…)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Influence of screen sizes on responses to visual analog scales of stressAn open questionnaire will be created by the Clinical Research Direction. The questionnaire will be opened by the examinator who will fulfill the anonymized identification of participants and the type of screens. In a dedicated room at the LaPSCo, the participants will answer the same VAS on four different sizes/types of screens (24-inch screen, laptop, tablet, smartphone) and on paper. Saliva will be collected after answering questionnaires. Heart rate variability and skin conductance will be measured with the use of a wrist watch during 15 minutes, from the entrance in the room to the completion of questionnaires. The participant will undergo the same examination within a week (15 minutes). | Other | experimental group |
Primary outcome
Visual analog scale to assess the perceived stress
Time frame: day 0
Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
Visual analog scale to assess the perceived stress
Time frame: day 7
Visual analog scale to assess the perceived stress on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)
11 secondary outcomes
Visual analog scale to assess anxiety
Time frame: day 0, day 7
Visual analog scale to assess sleep quality
Time frame: day 0, day 7
Visual analog scale to assess fatigue
Time frame: day 0, day 7
Job Demand-Control-Support (JDSC) questionnaire of Karasek
Time frame: day 0, day 7
The Effort-Reward Imbalance Questionnaire (ERI)
Time frame: day 0, day 7
The Work Addiction Risk Test (WART)
Time frame: day 0, day 7
Hospital Anxiety and Depression (HAD) Scale
Time frame: day 0, day 7
The Maslach Burn-out Inventory (MBI)
Time frame: day 0, day 7
Heart rate variability
Time frame: day 0, day 7
: skin conductance
Time frame: day 0, day 7
Salivary DHEAS
Time frame: day 0, day 7
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 12 Feb 2026.
- Individual participant dataSharing planned: No
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Screening Protocol
Pain
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
frédéric Dutheil principal investigator
University Hospital, Clermont-Ferrand
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Volunteers, run by University Hospital, Clermont-Ferrand at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 12 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Lise Laclautre (334.73.754.963, promo_interne_drci@chu-clermontferrand.fr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Visual analog scale to assess the perceived stress (time frame: day 0). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 12 Feb 2026.