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Active, Not Recruiting

NCT Number: NCT07372950

Kaiser Colorado Flu Nudge

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.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Influenza Infections Influenza, Human Orthomyxoviridae Infections RNA Virus Infections Respiratory Tract Diseases Respiratory Tract Infections Vaccination Virus Diseases

Age range

6 month and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Institute for Health Research

Aurora, Colorado, 80011, United States

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • 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

Exclusion criteria

  • Patients not eligible for flu vaccine

Treatment and study plan

Behavioral economics framed test messaging

Behavioral

We will use positive framing and convenience framing as our 2 behavioral text messages to improve flu vaccination rates.

Primary outcomes

  1. 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.

Secondary outcomes

  1. Time to flu vaccination

    Time frame: 12 weeks following receipt of 1st text message reminder

    Time from primary care clinic visit that triggered the flu reminder text message and date of flu vaccination as denoted in the EMR.

Sponsors and collaborators

Lead sponsor

Kaiser Permanente

Other

Registry information

Official study title

Randomized Controlled Trial of Different Behavioral Text Messages to Improve Influenza Vaccination Rates

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Jan 28, 2026
Registry last updated
Jan 28, 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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