NCT07372950

Kaiser Colorado Flu Nudge

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

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 100,000 (estimated)
• Sponsor: Kaiser Permanente · Academic / Other
• Sex: All
• Age: 6 Months
• Healthy volunteers: Not accepted

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. 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

Interventions

Type	Name	Description
BEHAVIORAL	Behavioral economics framed test messaging	We will use positive framing and convenience framing as our 2 behavioral text messages to improve flu vaccination rates.

Timeline

• Start date: 2025-10-06
• Primary completion: 2026-06-01
• Completion: 2026-09-01
• First posted: 2026-01-28
• Last updated: 2026-01-28

Locations

1 site across 1 country: United States