# Patient Portal Flu Vaccine Reminders_RCT 4

> **NCT05052190** · NA · TERMINATED · sponsor: **University of California, Los Angeles** · enrollment: 239567 (actual)

## Conditions studied

- Influenza
- Respiratory Tract Infections

## Interventions

- **BEHAVIORAL:** Text Message R/R with Direct Appointment Schedule Link
- **BEHAVIORAL:** Text Message R/R without Direct Appointment Schedule Link
- **BEHAVIORAL:** Text Pre-Appointment Reminder
- **BEHAVIORAL:** Portal Message R/R with Direct Appointment Schedule Link
- **BEHAVIORAL:** Portal Message R/R without Direct Appointment Schedule Link
- **BEHAVIORAL:** Portal Pre-Appointment Reminder

## Key facts

- **NCT ID:** NCT05052190
- **Lead sponsor:** University of California, Los Angeles
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2021-10-14
- **Primary completion:** 2022-04-01
- **Final completion:** 2022-04-01
- **Target enrollment:** 239567 (ACTUAL)
- **Why stopped:** IT error which contaminated study arms
- **Last updated:** 2025-04-11

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05052190

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05052190, "Patient Portal Flu Vaccine Reminders_RCT 4". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT05052190. Licensed CC0.

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