Trial reportJournal of general internal medicine2022
Effect of Personalized Messages Sent by a Health System's Patient Portal on Influenza Vaccination Rates: a Randomized Clinical Trial.
Trial report in Journal of general internal medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04110314 (Improving Influenza Vaccination Delivery Across a Health System by the Electronic Health Records Patient Portal- RCT #2), which is not on this map. Cited by 15 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Improving Influenza Vaccination Delivery Across a Health System by the Electronic Health Records Patient Portal- RCT #2
Who cites it
15 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- The Effectiveness of Digital Interventions to Increase Preventive Care Uptake in Older Adults: Systematic Review.JMIR aging · 2026Pooled it
- Assessing the Impact of Behavioral Sciences Interventions on Chronic Disease Prevention and Management: A Systematic Review of Randomized Controlled Trials.International journal of environmental research and public health · 2024Pooled it
- Video and Infographic Messages From Primary Care Physicians and Influenza Vaccination Rates: A Randomized Clinical Trial.JAMA network open · 2025Trial
- Evaluation of behavioral economic strategies to raise influenza vaccination rates across a health system: Results from a randomized clinical trial.Preventive medicine · 2023Trial
- Effect of Electronic Outreach Using Patient Portal Messages on Well Child Care Visit Completion: A Randomized Clinical Trial.JAMA network open · 2022Trial
- Algorithm-assisted personalized risk communication to encourage flu vaccination in the USA: three randomized field trials.Nature human behaviour · 2026Article
- Strategies to Enhance Seasonal Influenza Vaccination Uptake: Qualitative Insights from Primary Care Physicians in Greece.Vaccines · 2026Article
- Awareness, uptake, and barriers to vaccination against respiratory tract infections in patients with diabetes mellitus: A multi-center study in Saudi Arabia.Human vaccines & immunotherapeutics · 2025Article
- Interventions to Improve Vaccination Uptake Among Adults: A Systematic Review and Meta-Analysis.Vaccines · 2025Review
- Review
- Mobile Phone Text Message Reminders to Improve Vaccination Uptake: A Systematic Review and Meta-Analysis.Vaccines · 2024Review
- Article
- Use of Information and Communication Technology Strategies to Increase Vaccination Coverage in Older Adults: A Systematic Review.Vaccines · 2023Review
- Using Electronic Reminders to Improve Human Papillomavirus (HPV) Vaccinations among Primary Care Patients.Vaccines · 2023Article
- Impact of influenza on chronic obstructive pulmonary disease: pathophysiology, exacerbations, and preventive approaches.Therapeutic advances in respiratory diseaseReview
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors.
Funding
Abstract
backgroundAdult influenza vaccination rates are low. Tailored patient reminders might raise rates.
objectiveEvaluate impact of a health system's patient portal reminders: (1) tailored to patient characteristics and (2) incorporating behavioral science strategies, on influenza vaccination rates among adults.
designPragmatic 6-arm randomized trial across a health system during the 2019-2020 influenza vaccination season. The setting was one large health system-53 adult primary care practices.
participantsAll adult patients who used the patient portal within 12 months, stratified by the following: young adults (18-64 years, without diabetes), older adults (≥65 years, without diabetes), and those with diabetes (≥18 years).
interventionsPatients were randomized within strata to either (1) pre-commitment reminder alone (1 message, mid-October), (2) pre-commitment + loss frame messages, (3) pre-commitment + gain frame messages, (4) loss frame messages alone, (5) gain frame messages alone, or (6) standard of care control. Patients in the pre-commitment group were sent a message in mid-October, asking if they planned on getting an influenza vaccination. Patients in loss or gain frame groups were sent up to 3 portal reminders (late October, November, and December, if no documented influenza vaccination in the EHR) about importance and safety of influenza vaccine. MAIN MEASURES: Receipt of 1 influenza vaccine from 10/01/2019 to 03/31/2020. KEY
results196,486 patients (145,166 young adults, 29,795 older adults, 21,525 adults with diabetes) were randomized. Influenza vaccination rates were as follows: for young adults 36.8%, for older adults 55.6%, and for diabetics 60.6%. On unadjusted and adjusted (for age, gender, insurance, race, ethnicity, and prior influenza vaccine history) analyses, influenza vaccination rates were not statistically different for any study group versus control.
conclusionsPatient reminders sent by a health system's patient portal that were tailored to patient demographics (young adults, older adults, diabetes) and that incorporated two behavioral economic messaging strategies (pre-commitment and loss/gain framing) were not effective in raising influenza vaccination rates.
trial registrationThis trial was registered with ClinicalTrials.gov (NCT04110314).
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.