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NCT Number: NCT04040608

Influence of Screen Sizes on Responses to Visual Analog Scales of Stress

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.

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Key information

Conditions

Volunteers

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Chu Clermont Ferrand

Clermont-Ferrand, 63003, France

Location status: Recruiting

Location contact

Frédéric DUTHEIL

PRINCIPAL_INVESTIGATOR

Lise Laclautre

CONTACT

[email protected]

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.

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).

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adult persons

Exclusion criteria

  • Refusal to participate in the study
  • Unable to answer basic questions (difficulties understanding, cognitive disorders…)

Treatment and study plan

Influence of screen sizes on responses to visual analog scales of stress

Other

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).

Primary outcomes

  1. 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)

  2. 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)

Secondary outcomes

  1. Visual analog scale to assess anxiety

    Time frame: day 0, day 7

    Visual analog scale to assess anxiety on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)

  2. Visual analog scale to assess sleep quality

    Time frame: day 0, day 7

    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)

  3. Visual analog scale to assess fatigue

    Time frame: day 0, day 7

    Visual analog scale to assess fatigue on a horizontal, non-calibrated line of 100 mm, ranging from very low (0) to very high (100)

  4. Job Demand-Control-Support (JDSC) questionnaire of Karasek

    Time frame: day 0, day 7

    The Job Demand-Control-Support (JDSC) questionnaire of Karasek assessed job demands, job control and social support through 26 items.

  5. The Effort-Reward Imbalance Questionnaire (ERI)

    Time frame: day 0, day 7

    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.

  6. The Work Addiction Risk Test (WART)

    Time frame: day 0, day 7

    The Work Addiction Risk Test (WART) was developed by Robinson et al. from symptoms reported by clinicians caring for patients with work addiction

  7. Hospital Anxiety and Depression (HAD) Scale

    Time frame: day 0, day 7

    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

  8. The Maslach Burn-out Inventory (MBI)

    Time frame: day 0, day 7

    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)

  9. Heart rate variability

    Time frame: day 0, day 7

    Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy

  10. : skin conductance

    Time frame: day 0, day 7

    Heart rate variability and skin conductance will be measured with the use of the wristband Empatica E4, Italy

  11. Salivary DHEAS

    Time frame: day 0, day 7

    Salivary DHEAS is a biomarker of chronic stress, with a long half-life of 16 hours

Study contacts

Contact information is provided by the study sponsor or research team.

Lise Laclautre

CONTACT

[email protected]

334.73.754.963

Sponsors and collaborators

Lead sponsor

University Hospital, Clermont-Ferrand

Other

Collaborators

  • Institut de Médecine du Travail
  • UMR CNRS 6024, LaPSCo

Registry information

Acronym: SIVAStress

Important dates

Study start
2021
Primary completion
2028
Study completion
2028
First posted
Jul 31, 2019
Registry last updated
Feb 12, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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