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Default Option Nudging Intervention to Improve the Adherence Rates of Cancer Screening

26 giugno 2026 aggiornato da: Zhisheng Zheng, Harbin Medical University

Default Option Nudging Intervention to Improve the Adherence Rates of Cancer Screening in High-risk Population: Randomized Controlled Trial and Intervention Disclosure Analysis

The goal of this clinical trial is to learn if a behavioral "nudge" strategy, specifically a default option, can improve screening participation in populations at high risk for lung and stomach cancer. The main questions it aims to answer are:

  1. Does presenting a screening appointment as a default option increase the likelihood that high-risk individuals will choose to be screened?
  2. How do participants react, and what is their level of acceptance, when the nudge intervention is disclosed to them?
  3. Does this transparency (disclosing the nudge) change their subsequent screening decisions? Researchers will compare a default option group to a standard control group to see if the nudge effectively increases screening adherence.

Participants will:

  1. Read a short educational text about lung or stomach cancer and its screening.
  2. Complete an online questionnaire.
  3. Make a decision regarding a simulated cancer screening appointment.
  4. Read a disclosure explaining the behavioral nudge strategy used during the study.
  5. Re-evaluate their screening decision and answer questions regarding their attitude toward the nudge.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Tipo di studio

Interventistico

Iscrizione (Effettivo)

1200

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

  • Cina
    • Heilongjiang
      • Harbin, Heilongjiang, Cina, 150081
        • Harbin Medical University

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

Sì

Descrizione

Inclusion Criteria:

  • High-risk population of lung cancer or gastric cancer.
  • Lung cancer high-risk definition (based on the 2024 Lung Cancer Screening and Early Diagnosis and Treatment Program organized by the National Health Commission of the PRC): Age ≥50 years and pack-years of smoking ≥20, including former smoking ≥20 pack-years, but smoking cessation less than 15 years (Note: Pack-years of smoking = number of packs smoked per day × number of years smoked).
  • Gastric cancer high-risk definition (based on the 2024 Gastric Cancer Screening and Early Diagnosis and Treatment Program organized by the National Health Commission of the PRC): Age ≥45 years old and living in areas with a high incidence of gastric cancer (Liaoning, Fujian, Gansu, Shandong, Jiangsu).
  • Ability to read and comprehend simplified Chinese.
  • The informed consent statement was read and confirmed.

Exclusion Criteria:

  • Reading impairment preventing independent questionnaire completion.
  • Failure to pass attention checks and logical consistency tests embedded within the questionnaire.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Ricerca sui servizi sanitari
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Doppio

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Nessun intervento: control group (lung cancer screening)
Control group participants received neutral, informational content about lung cancer and screening. This content included lung cancer's status as a leading cause of cancer mortality, the challenges of late-stage diagnosis, and LDCT as the gold standard screening method. Participants were informed that high-risk individuals, particularly long-term smokers, require annual screening due to elevated cancer risk, with each participant explicitly told they qualified as high-risk due to their smoking history. Meanwhile, CanSPUC and its purpose were also shown to the participants. The screening participation question for controls was framed as: "We provide available time slots for free lung cancer screening. You can directly view available appointment times and make reservations according to your preference. Would you like to schedule lung cancer screening?"
Sperimentale: intervention group (lung cancer screening)
Intervention participants received the same neutral information plus a default option nudge. The critical modification involved reframing the screening participation measure as: "We have already scheduled a free lung cancer screening appointment for you, which you can attend at your convenience. If you do not wish to participate, please indicate below." We also default to "Yes, I would like to make an appointment for lung cancer screening and see the available hours for lung cancer screening" for this question.
Comportamentale: Default Options
Participants in this arm are subjected to a behavioral "nudge" using a default option mechanism during a simulated online appointment process for cancer screening. Instead of being asked to actively schedule an appointment (an opt-in approach), the screening appointment is presented to them as pre-selected or pre-scheduled (an opt-out approach). Furthermore, to evaluate the ethical and behavioral impact of transparency, this intervention uniquely includes a "disclosure" phase: after the initial decision, participants are explicitly informed about the nudge strategy that was just applied to them, and their screening intention is immediately re-measured.
Nessun intervento: control group (gastric cancer screening)
Control group participants received neutral, informational content about gastric cancer and screening. This content included gastric cancer's status as a cause of cancer mortality, the challenges of late-stage diagnosis, and endoscope as the gold standard screening method. Participants were informed that high-risk individuals require screening per 5 years, with each participant explicitly told they qualified as high-risk due to their living regions. Meanwhile, CanSPUC and its purpose were also shown to the participants. The screening participation question for controls was framed as: "We provide available time slots for free gastric cancer screening. You can directly view available appointment times and make reservations according to your preference. Would you like to schedule gastric cancer screening?"
Sperimentale: intervention group (gastric cancer screening)
Intervention participants received the same neutral information plus a default option nudge. The critical modification involved reframing the screening participation measure as: "We have already scheduled a free gastric cancer screening appointment for you, which you can attend at your convenience. If you do not wish to participate, please indicate below." We also default to "Yes, I would like to make an appointment for gastric cancer screening and see the available hours for lung cancer screening" for this question.
Comportamentale: Default Options
Participants in this arm are subjected to a behavioral "nudge" using a default option mechanism during a simulated online appointment process for cancer screening. Instead of being asked to actively schedule an appointment (an opt-in approach), the screening appointment is presented to them as pre-selected or pre-scheduled (an opt-out approach). Furthermore, to evaluate the ethical and behavioral impact of transparency, this intervention uniquely includes a "disclosure" phase: after the initial decision, participants are explicitly informed about the nudge strategy that was just applied to them, and their screening intention is immediately re-measured.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Percentage of Participants Who Accept the Cancer Screening Appointment
Lasso di tempo: Immediately after the default option intervention
This outcome is assessed via a dichotomous choice (Yes/No) embedded in the simulated online scheduling system within the questionnaire. The value reported will be the percentage of participants who choose to accept and schedule the screening appointment.
Immediately after the default option intervention

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Participant Attitude Score Towards the Default Option Nudge
Lasso di tempo: Immediately after the disclosure of the intervention
This measure is assessed via a self-reported questionnaire using a Likert scale. Scores range from 1 to 5, where 1 indicates a very negative attitude and 5 indicates a very positive attitude. Higher scores represent a better attitude towards the nudge strategy.
Immediately after the disclosure of the intervention
Self-Reported Score of the Nudge's Influence on Decision-Making
Lasso di tempo: Immediately after the disclosure of the intervention
This measure is assessed via a self-reported questionnaire using a Likert scale. Scores range from 1 to 5, where 1 indicates no influence and 5 indicates extreme influence. Higher scores indicate that the participant felt the default option had a greater influence on their appointment decision.
Immediately after the disclosure of the intervention
Acceptance Score of the Default Option Nudge in Public Health Services
Lasso di tempo: Immediately after the disclosure of the intervention
This measure is assessed via a self-reported questionnaire using a Likert scale. Scores range from 1 to 5, where 1 indicates completely unacceptable and 5 indicates completely acceptable. Higher scores indicate higher social acceptance and suitability of using such behavioral nudges in public health promotion.
Immediately after the disclosure of the intervention
Percentage of Participants Who Accept the Appointment After Disclosure
Lasso di tempo: Immediately after the disclosure of the intervention
This outcome is assessed via a secondary dichotomous choice (Yes/No) presented after the participant reads the disclosure statement explaining the nudge. The value reported is the percentage of participants who choose to accept the screening at this final stage.
Immediately after the disclosure of the intervention

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Harbin Medical University

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

27 aprile 2025

Completamento primario (Effettivo)

1 giugno 2025

Completamento dello studio (Effettivo)

1 giugno 2025

Date di iscrizione allo studio

Primo inviato

23 giugno 2026

Primo inviato che soddisfa i criteri di controllo qualità

26 giugno 2026

Primo Inserito (Effettivo)

2 luglio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

2 luglio 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

26 giugno 2026

Ultimo verificato

1 giugno 2026

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • HMUIRB2025029PRE

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

SÌ

Descrizione del piano IPD

All collected de-identified individual participant data (IPD) that underlie the results reported in the final publication. This includes demographic characteristics, group allocation, behavioral screening decisions, and responses related to attitudes toward the disclosure intervention.

Periodo di condivisione IPD

Data will be available beginning 6 months and ending 36 months following the publication of the article.

Criteri di accesso alla condivisione IPD

Researchers who provide a methodologically sound proposal.

Tipo di informazioni di supporto alla condivisione IPD

  • STUDIO_PROTOCOLLO
  • LINFA
  • ICF

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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