An interventional study of telephone benefits group and telephone social norms group in Cancer Screening Tests and Health Behavior, sponsored by Chiayi Christian Hospital. Completed at 1 site in Taiwan. Open to participants aged 30 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by Chiayi Christian Hospital · Not applicable, Interventional, and Screening
Objectives: Telephone interventions are often delivered to promote cancer screening for early detection and treatment. However, the effects of nudging information provided in telephone interventions on cancer screening behavior remain unclear. Accordingly, this study investigated the effects of telephone-delivered nudging information regarding screening benefits and social norms on cancer screening behavior.
Methods: This randomized controlled trial included 1,200 community-dwelling individuals meeting screening criteria for colorectal, breast, cervical, or oral cancer. Participants were assigned to one of four groups: telephone benefits, telephone social norms, telephone reminder, and letter reminder. The dependent variable was cancer screening behavior within 6 months after the intervention.
967 studies on the registry are indexed under Health Behavior; 165 are open to participants now.
This study's enrollment of 1,200 is above the median of 150 across 824 interventional studies indexed under Health Behavior.
Browse Health Behavior studies →Chiayi Christian Hospital is the lead sponsor of 27 studies on the registry; 9 are open to participants now.
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Exclusion Criteria:
Behavioral: telephone benefits group
Behavioral: telephone social norms group
Behavioral: telephone reminder group
Behavioral: letter reminder group
In the intervention, participants were provided with three categories of information: (1) the reasons why they were receiving the information (delivered by telephone or letter), that is, information regarding the criteria they met, such as their age or lack of screening history within a certain time period; (2) reasons why they should undergo screening, including nudging information related to benefits or social norms; and (3) a description of how they could make cancer screening appointments. In the telephone benefits group, key information regarding the benefits of cancer screening was provided with consideration of the health belief model (Lau et al., 2020).
In the intervention, participants were provided with three categories of information: (1) the reasons why they were receiving the information (delivered by telephone or letter), that is, information regarding the criteria they met, such as their age or lack of screening history within a certain time period; (2) reasons why they should undergo screening, including nudging information related to benefits or social norms; and (3) a description of how they could make cancer screening appointments. In the telephone social norms group, the following were provided with consideration of the theory of planned behavior (Ritchie et al., 2021).
In the intervention, participants were provided with three categories of information: (1) the reasons why they were receiving the information (delivered by telephone or letter), that is, information regarding the criteria they met, such as their age or lack of screening history within a certain time period; (2) reasons why they should undergo screening, including nudging information related to benefits or social norms; and (3) a description of how they could make cancer screening appointments. The telephone reminder group only received the first and third types of information.
In the intervention, participants were provided with three categories of information: (1) the reasons why they were receiving the information (delivered by telephone or letter), that is, information regarding the criteria they met, such as their age or lack of screening history within a certain time period; (2) reasons why they should undergo screening, including nudging information related to benefits or social norms; and (3) a description of how they could make cancer screening appointments. The letter reminder group only received the first and third types of information.
Cancer behavior
The primary outcome is whether the participants completed cancer screening or not (yes or no)
Time frame: From enrollment to the end of treatment at 6 months.
PDFs hosted by the registry, ClinicalTrials.gov.
Plan to share: No
Ran from Jan 2023 to primary completion in Jan 2023, 0 months.
Of 567 non-industry interventional studies with no phase under Health Behavior, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 33. This study's 0 months is below that.
Counting every sponsor, half of 585 studies reached it within 15 months; a quarter within 5 and three quarters within 32.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.
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Chiayi Christian Hospital