InfluenzaNCT07372950
Kaiser Colorado Flu Nudge
A study testing Behavioral economics framed test messaging in people with Influenza and Vaccination, run by Kaiser Permanente at 1 site in United States.
Trial summary
Influenza infection leads to significant morbidity and mortality each year. Influenza vaccines can reduce the risk of flu and the severity of flu illness, In addition, flu vaccinations can reduce flu complications such as pneumonia or worsening of chronic heart or lung disease. Read more about this study
- Who is it for?
- Ages 6 months and older
- Conditions the study is for
- Influenza, Vaccination
- What is being tested?
- Behavioral economics framed test messaging
- Type of treatment
- Vaccines, Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 100,000 participants
- Where
- 1 siteUnited States
- Study dates
- 6 Oct 2025to 1 Sep 2026
- Phase
- Interventional
- 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 6 months and older
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Patients 6 months and older who have not received a flu shot at the time of their primary care clinic appointment reminder will be eligible to receive a flu vaccine reminder text message. For children <18 years of age, their caregiver will receive the text message
Who cannot join
- Patients not eligible for flu vaccine
Trial locations and contacts
1 site in 1 country.
United States1 site
Institute for Health Research
Aurora, Colorado, 80011
About this study
Official title: Randomized Controlled Trial of Different Behavioral Text Messages to Improve Influenza Vaccination Rates
Influenza infection leads to significant morbidity and mortality each year. Influenza vaccines can reduce the risk of flu and the severity of flu illness, In addition, flu vaccinations can reduce flu complications such as pneumonia or worsening of chronic heart or lung disease. Each year, Kaiser Permanente of Colorado offers influenza vaccines to patients at no cost either at primary care clinic appointments or flu walk-in clinics in the fall prior to the upcoming flu season. In addition, as part of clinic appointment reminder text messages, there is a message to get the flu vaccine for patients who have not received the vaccine prior to the clinic visit. Building on these flu reminder text messages for patients who have not received a flu vaccine, this study will test different behavioral nudge text messages to improve influenza vaccination rates.
- Conditions
- Influenza, Vaccination
- Being tested
- Behavioral economics framed test messaging
- Keywords
- influenza, vaccination, text messages, behavioral change
- Medical subject headings
- Influenza, Human
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Behavioral economics framed test messagingBehavioural
We will use positive framing and convenience framing as our 2 behavioral text messages to improve flu vaccination rates.
| Study group | Role | What they receive |
|---|---|---|
| Generic text messages | Active comparator | Patients will receive the usual flu vaccine text message reminder Receives: Behavioral: Behavioral economics framed test messaging |
| Positively framed | Experimental | Patients will receive a positively framed text message to get the flu vaccine Receives: Behavioral: Behavioral economics framed test messaging |
| Convenience framed | Experimental | Patients will receive a convenience framed text message to get the flu vaccine Receives: Behavioral: Behavioral economics framed test messaging |
What is being measured
The primary outcome is the main question the study is designed to answer.
Receive flu vaccine
Did the patient receive a flu vaccine as denoted from the EMR. The vaccine could have occurred within Kaiser Permanente Colorado or outside of Kaiser Permanente Colorado and in which Kaiser received information about the flu vaccination during the flu season 2025-2026.
Measured: 12 weeks following receipt of first text message reminder
Secondary outcomes (1)
Time to flu vaccination
Time from primary care clinic visit that triggered the flu reminder text message and date of flu vaccination as denoted in the EMR.
Measured: 12 weeks following receipt of 1st text message reminder
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Jan 2026
- Study start6 Oct 2025
- Primary completion1 Jun 2026 (estimated)
- Study completion1 Sep 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for InfluenzaStudies of the same condition, open and under way.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 100,000 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Kaiser Permanente
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Michael Ho, Kaiser Permanente
- Investigators
- Michael Ho, MD, PhD, Principal investigator, Kaiser Permanente
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07372950
- Sponsor's protocol ID
- 2368690-1
- Status last verified
- Jan 2026
- First submitted
- 1 Oct 2025
- Last updated
- 28 Jan 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 28 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Randomized Controlled Trial of Different Behavioral Text Messages to Improve Influenza Vaccination Rates
- ClinicalTrials.gov ID
- NCT07372950
- Acronym / sponsor ID
- 2368690-1
- Conditions
- Influenza, Vaccination
- Keywords
- influenza, vaccination, text messages, behavioral change
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 100,000 participants (estimated)
- Lead sponsor
- Kaiser PermanenteUniversity, hospital or other
- Study start
- 6 Oct 2025 (actual)
- Primary completion
- 1 Jun 2026 (estimated)
- Study completion
- 1 Sep 2026 (estimated)
- First posted
- 28 Jan 2026 (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.
Influenza infection leads to significant morbidity and mortality each year. Influenza vaccines can reduce the risk of flu and the severity of flu illness, In addition, flu vaccinations can reduce flu complications such as pneumonia or worsening of chronic heart or lung disease. Each year, Kaiser Permanente of Colorado offers influenza vaccines to patients at no cost either at primary care clinic appointments or flu walk-in clinics in the fall prior to the upcoming flu season. In addition, as part of clinic appointment reminder text messages, there is a message to get the flu vaccine for patients who have not received the vaccine prior to the clinic visit. Building on these flu reminder text messages for patients who have not received a flu vaccine, this study will test different behavioral nudge text messages to improve influenza vaccination rates.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Generic text messages | Active comparator | Behavioral: Behavioral economics framed test messagingPatients will receive the usual flu vaccine text message reminder |
| Positively framed | Experimental | Behavioral: Behavioral economics framed test messagingPatients will receive a positively framed text message to get the flu vaccine |
| Convenience framed | Experimental | Behavioral: Behavioral economics framed test messagingPatients will receive a convenience framed text message to get the flu vaccine |
Who may qualify
- Ages
- 6 months and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (1 listed)
- Patients 6 months and older who have not received a flu shot at the time of their primary care clinic appointment reminder will be eligible to receive a flu vaccine reminder text message. For children <18 years of age, their caregiver will receive the text message
Key exclusion criteria (1 listed)
- Patients not eligible for flu vaccine
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 |
|---|---|---|
| Behavioral economics framed test messagingWe will use positive framing and convenience framing as our 2 behavioral text messages to improve flu vaccination rates. | Behavioural | Convenience framed, Generic text messages, Positively framed |
Primary outcome
Receive flu vaccine
Time frame: 12 weeks following receipt of first text message reminder
Did the patient receive a flu vaccine as denoted from the EMR. The vaccine could have occurred within Kaiser Permanente Colorado or outside of Kaiser Permanente Colorado and in which Kaiser received information about the flu vaccination during the flu season 2025-2026.
1 secondary outcome
Time to flu vaccination
Time frame: 12 weeks following receipt of 1st text message reminder
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 28 Jan 2026.
- Individual participant dataSharing planned: No
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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. This study is not recruiting at the moment.
Michael Ho, MD, PhD principal investigator
Kaiser Permanente
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Behavioral economics framed test messaging in people with Influenza and Vaccination, run by Kaiser Permanente at 1 site in United States.
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 1 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: under way, not looking for participants, as of the sponsor's last update on 28 Jan 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 United States. 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?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Receive flu vaccine (time frame: 12 weeks following receipt of first text message reminder). 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 28 Jan 2026.