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Trial registered on ANZCTR
Registration number
ACTRN12624000843550p
Ethics application status
Submitted, not yet approved
Date submitted
22/05/2024
Date registered
8/07/2024
Date last updated
8/07/2024
Date data sharing statement initially provided
8/07/2024
Type of registration
Prospectively registered
Titles & IDs
Public title
Effect of Posture on Recall of Health Information from a Vaping Website
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Scientific title
The Effects of Posture on the Recall of Health Information from a Vaping Website in a Community Sample: A Randomised Trial
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Secondary ID [1]
312192
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AHREC 27885
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
E-cigarette use
333703
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Condition category
Condition code
Public Health
330383
330383
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0
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Health promotion/education
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Mental Health
330535
330535
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0
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Studies of normal psychology, cognitive function and behaviour
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Manipulation of participants posture while seated (upright, seated posture compared to slumped, seated posture).
Intervention condition:
Upright, seated posture.
Participants randomly allocated to the intervention group will be covertly manipulated into an upright, seated posture while viewing a vaping safety website by adjusting the position of the laptop they are watching the video on. In the intervention condition the laptop will be positioned on a table-top stand so that the screen height is level with the participants eye level, which will endow participants to sit with a straighter back, reducing their head and neck angle. This method for covertly manipulating participants seated posture has been implemented successfully in prior research (Muller et al., 2023).
Intervention location - Clinic room at the University of Auckland Faculty of Medical and Health Sciences Clinical Research Centre
Intervention Materials - The Vaping website that participants will view has been sourced from Healthify He Puna Waiora website produced by Health Navigator Charitable Trust. The Healthify website provides the New Zealand public with access to up-to-date, accurate and evidenced-based health information and self-help resources produced and maintained by experienced medical writers and clinical advisors. Healthify He Puna Waiora is currently endorsed by the Royal New Zealand College of General Practitioners as an online healthcare information resource which is broad, accessible and well informed and researched. The specific Webpage that will be used in the study is titled "Vaping" and can be sourced through this link (https://healthify.nz/hauora-wellbeing/v/vaping/).
Intervention Delivery - Participants will be given specific verbal instructions about what sections of the Vaping webpage they are expected to review and which sections of the website are referenced within the short-answer knowledge quiz they will be completing after interacting with the website. The Healthify Vaping website consists of several expandable tabs each labelled with a subtitle and participants will be instructed to read and watch the material from the first tab subtitled, What is vaping?" through to the tab subtitled, "Side effects of vaping." The researcher will highlight that the second tab subtitled, "VIDEO: A Spotlight on Vaping series" includes an embedded video and that the content in the video may be included in the short-answer knowledge quiz and so should be included also. Participants will be told that they may navigate through the content specified in whatever order they please and that they may view the website material for as long as they desire before informing the researcher that they have finished viewing the website.
Intervention frequency and duration - The intervention involving exposure to the website will take place once only. While participants may view the website for as long as they wish to, it is expected that for most participants this will take 10 to 15 minutes based on mock intervention rehearsals conducted by the research team. The post-intervention questionnaire which will included a free-recall task, short-answer quiz and RABE questionnaire and VAS measure is expected to take 5 to 10 minutes based off mock trial rehearsals conducted within the research team.
Adherence Monitoring - In order to assess the effectiveness of the posture manipulation the intervention will be video recorded with participant consent. The video recording of the intervention will also be used to measure how long participants interact with the website and monitor participants website viewing behaviour (e.g do they view all specified tabs, do they watch the embedded video in full, are there sections that they navigate back to and review). Participants will be told that the purpose of the video recording is for the researchers to be able to review how participants interact with the website and to ensure that participants have in fact read through and watched all content they have bene instructed to.
Additionally, the researcher conducting the study will be present in the room to facilitate the study, provide instructions and answer participant questions, and to troubleshoot any technical issues which may arise. The researcher will also be able to covertly monitor that participants are engaging in the intervention in real time as they will be in the room with the participant throughout the study duration.
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Intervention code [1]
328516
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Behaviour
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Intervention code [2]
328517
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Treatment: Other
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Comparator / control treatment
Manipulation of participants posture while seated (upright, seated posture compared to slumped, seated posture).
Comparison condition:
Slumped, seated posture. Participants randomly allocated to the comparison group will be covertly manipulated into adopting a slumped, seated posture while viewing a vaping safety website. In the comparison condition the laptop will be positioned flat on the table-top, causing participants eye gaze to drop, shoulders slump forward, and neck angle increase. This method for covertly manipulating participants seated posture has been implemented successfully in prior research (Muller et al., 2023).
Comparison condition Location:
Clinic room at the University of Auckland Faculty of Medical and Health Sciences Clinical Research Centre
Comparison condition materials and delivery:
As with the intervention condition, participants will be given verbal instructions to read through the Healthify He Puna Waiora website page titled, "Vaping." The content and instructions provided to participants randomly assigned to the comparator condition will not differ in anyway from that specified above for the intervention condition.
Comparison condition Frequency and duration:
Participants will be exposed to the Healthify Vaping webpage once only and will have no specified time restraints on how long they interact with the webpage for. Based off of mock study rehearsals conducted by the researcher with the research team it is expected that this will take approximately 10 to 15 minutes.
Comparator Adherence Monitoring:
As with the intervention condition a digital camera will be set on a tripod adjacent to the desk setup where the participants will sit and interact with the Healthify Vaping webpage and will capture a recording of participants profile. This footage will be used to assess the postural manipulation of the intervention and comparator conditions, measure how long participants interact with the webpage and to review how participants navigated through the website. The researcher facilitating the study session will be in the room and able to discreetly check the laptop screen and whether the participants are following instructions or interfering with the postural manipulation (for example, taking the laptop off the stand).
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Control group
Active
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Outcomes
Primary outcome [1]
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Recall of total health information from a Vaping website (Healthify.nz/vaping).
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Assessment method [1]
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To assess recall, the webpage (Healthify.nz/vaping) will be coded into informational units. Participants will then complete two tasks which will require them to recall information they have just read from the webpage. Firstly, participants will complete a free recall task in which they will be asked to, "Write down as much of the key information that you can remember from the website". Participants answers will be analysed by the researchers and a recall score calculated according to the number of coded informational units recalled (Coded informational units will only be counted once). Secondly, participants will complete a short-answer comprehension quiz which will ask them questions which relate to specific health-related information from the website. Participants will receive a final recall score by combining their score from the free-recall task and short-answer quiz.
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Timepoint [1]
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The primary outcome will be assessed once following exposure to the website.
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Secondary outcome [1]
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Perceptions of health impacts of vaping
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Assessment method [1]
435358
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Participants perceptions of vape use will be assessed using the Risks and Benefits of E-cigarettes (RABE) questionnaire (Copeland et al., 2017). The RABE is self-report questionnaire developed by Copeland and colleagues (2017) to assess individuals' perceptions of both the benefits and consequences of e-cigarette use. The questionnaire has a two factor structure, with a Risk subscale consisting of 16 items (a = 0.92), and a Benefits subscale consisting of 14 items (a = 0.89). Participants are asked to indicate how strongly they agree or disagree with the likeliness of each item using a 7-point Likert scale, with 1 indicating 'totally disagree' and 7 indicating 'totally agree.'
Participants scores on the RABE before and after exposure to the website will be calculated to see if exposure to the website had any impact on participants perceptions of the health impacts of vaping. Change scores will also be compared between intervention groups to see if there are any differences in effect due to posture.
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Timepoint [1]
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Participants perceptions of health impacts of vaping will be assessed at baseline using the RABE, and following exposure to the vaping website (Healthify.nz/vaping) once again using the RABE.
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Secondary outcome [2]
435359
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Arousal
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Assessment method [2]
435359
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100mm Visual Analogue Scale (VAS).
Two VAS scales will be used to measure arousal (alertness, sleepiness). The first scale will measure participants alertness and will use the anchor labels, "Not alert" to "very alert." The second scale will be used to measure participants sleepiness and will use the anchor labels, "not sleepy" to "very sleepy."
A total Arousal score will be calculated by first reverse-coding the sleepy scale so that the alert and sleepy scales are unidimensional, then taking the average of the scores from the two Arousal scales, with a higher total Arousal score indicating higher arousal.
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Timepoint [2]
435359
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Arousal will be measured at baseline prior to the postural manipulation being implemented, and a second time as part of the post-intervention questionnaire which participants will complete once they have finished reading through the Healthify Vaping webpage and while still in the postural manipulation set up corresponding to the condition they have been randomly assigned to.
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Secondary outcome [3]
435360
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Time spent looking at website
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Assessment method [3]
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Minutes and seconds.
Assessed by reviewing timecode of video recording from digital camera.
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Timepoint [3]
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Once while they are looking at the website
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Secondary outcome [4]
435361
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Total number of words in the free recall task
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Assessment method [4]
435361
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Word count
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Timepoint [4]
435361
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Once after the viewing of the website
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Secondary outcome [5]
436259
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Valence
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Assessment method [5]
436259
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100mm Visual Analogue Scale (VAS).
Two VAS scales will be used to measure valence (positive valence, negative valence). The first scale will measure participants positive valence and will use the anchor labels, "not positive at all" and "very positive." The second scale will be used to measure negative valence and will use the anchor labels, "not negative at all" and "very negative."
A total valence score will be calculated by first reverse-coding the negative emotion scale so that the positive and negative emotion scales are unidimensional, then taking the average of the scores from the two valence scales, with a higher total valence score indicating more positive valence.
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Timepoint [5]
436259
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Valence will be measured at baseline prior to the postural manipulation being implemented, and a second time as part of the post-intervention questionnaire which participants will complete once they have finished reading through the Healthify Vaping webpage and while still in the postural manipulation set up corresponding to the condition they have been randomly assigned to.
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Eligibility
Key inclusion criteria
Inclusion criteria:
Participants are at least 16 years of age.
Participants are able to read, write and speak English.
Participants are able to fully understand the risks and benefits of the research and provide informed consent.
The inclusion criteria require participants to be a minimum of 16 years of age (meaning they may provide informed consent), as we are interested specifically in the influence posture has on the recall of health information for adults and young adults within the general population.
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Minimum age
16
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Exclusion criteria:
Significant visual impairment which prevents participants from reading information from a screen.
The only exclusion criteria, being significant visual impairment, has been set in response to the confines of the experimental design of the study which requires participants to be able to read health information from a website, and complete study measures displayed on
a screen.
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Study design
Purpose of the study
Educational / counselling / training
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Sealed opaque envelopes
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using a randomisation table created by computer software by a researcher not involved in recruitment.
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
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Intervention assignment
Parallel
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
A target sample size of 128 participants to be recruited for the proposed study to be
appropriately powered to find a result if one exists following a G*Power calculation. The parameters used were a power level of .80 and a significance of a = 0.05, as is consistent with psychological research conventions. A medium effect size of d=.50 was selected based on previous literature.
Data analysis will be conducted using IBM SPSS software. All data will be inspected for errors, gaps, and outliers. The data will be assessed for normality using Shapiro-Wilk tests and for homogeneity of variance using Leven’s tests. If data does not meet normality assumptions, bootstrapping and non-parametric tests will be used to transform data appropriately. Characteristics of the sample will be assessed using descriptive statistics. Differences in demographic and baseline characteristics between groups will be assessed using Pearson’s Chi-Square test and independent samples t-tests.
To assess the primary hypothesis, differences in the recall of vaping-related health information from the web site between the upright and slumped posture groups will be assessed using independent sample t-tests. Secondary hypotheses will be assessed by conducting repeated measures mixed ANOVA to assess differences in perceptions of risks and benefits of e-cigarette use between groups before and after exposure to the vaping web site. Differences in arousal and valence will be assessed with mixed ANOVA.
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
15/07/2024
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Actual
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Date of last participant enrolment
Anticipated
29/11/2024
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Actual
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Date of last data collection
Anticipated
29/11/2024
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Actual
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Sample size
Target
128
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Accrual to date
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Final
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Recruitment outside Australia
Country [1]
26320
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New Zealand
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State/province [1]
26320
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Auckland
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Funding & Sponsors
Funding source category [1]
316437
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University
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Name [1]
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The University of Auckland
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Address [1]
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Country [1]
316437
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New Zealand
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Primary sponsor type
University
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Name
The University of Auckland
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Address
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Country
New Zealand
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Secondary sponsor category [1]
318606
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None
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Name [1]
318606
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Address [1]
318606
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Country [1]
318606
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Ethics approval
Ethics application status
Submitted, not yet approved
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Ethics committee name [1]
315229
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Auckland Health Research Ethics Committee
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Ethics committee address [1]
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https://www.auckland.ac.nz/en/research/about-our-research/human-ethics.html
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Ethics committee country [1]
315229
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New Zealand
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Date submitted for ethics approval [1]
315229
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20/05/2024
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Approval date [1]
315229
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Ethics approval number [1]
315229
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Summary
Brief summary
The principal aim of this study is to investigate the effects of an upright, seated posture compared to a slumped, seated posture on participants' memory and recall of health information from a Vaping website. The primary hypothesis is that participants in an upright, seated posture will recall a greater amount of health information compared to participants in a slumped, seated posture. Additionally, it is hypothesised that participants in an upright, seated posture will spend a greater amount of time interacting with the website and provide a greater amount of written feedback during the free recall task than participants in a slumped, seated posture. They will also have higher arousal, and more positive valence, and more accurrate perceptions of the risks and benefits of vaping.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Prof Elizabeth Broadbent
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Address
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Department of Psychological Medicine, The University of Auckland, Private Bag 92019 Auckland 1142
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Country
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New Zealand
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Phone
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+64 9 3737599
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Elizabeth Broadbent
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Address
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Department of Psychological Medicine, The University of Auckland, Private Bag 92019 Auckland 1142
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Country
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New Zealand
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Phone
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+64 9 3737599
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Fax
134059
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Email
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[email protected]
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Contact person for scientific queries
Name
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Elizabeth Broadbent
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Address
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Department of Psychological Medicine, The University of Auckland, Private Bag 92019 Auckland 1142
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Country
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New Zealand
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Phone
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+64 9 3737599
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Fax
134060
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Email
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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