Factors Influencing Flu Vaccination in Primary Health Care

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT04097197

Acronym

FIVA

Enrollment

197

Registered

2019-09-20

Start date

2019-10-14

Completion date

2020-03-31

Last updated

2020-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Flu, Human

Keywords

Influenza Vaccines, Influenza, Human, Primary Health Care

Brief summary

This study aims to study the barriers to flu vaccination among at-risk people at the Primary Health Care level in order to increase the vaccination rates as recommended by the World Health Organization.

Detailed description

People from vulnerable groups (e.g., those diagnosed with Diabetes, Chronic Obstructive Pulmonary Disease, Asthma) are at increased risk of developing complications from infection with influenza virus, that could ultimately result in death. Flu vaccination is recommended by many authorities, including the World Health Organization, as a means to decrease the risk of developing such life-threatening conditions. However, vaccination rates are well below the recommended threshold.

Interventions

BEHAVIORALBrief educational intervention

same as before

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

PREVENTION

Masking

NONE

Intervention model description

Before-after study

Eligibility

Sex/Gender

ALL

Healthy volunteers

Yes

Inclusion criteria

* People 65+ otherwise healthy; * Patients of any age diagnosed with at least one of the following conditions: Diabetes, Asthma, COPD, Coronary Disease or Hearth failure; * No history of flu vaccination in the previous year.

Exclusion criteria

* Patients who have been vaccinated against the flu but who have no record of it in the clinical records; * Patients with contraindications to flu vaccination; * Patients that cannot be reached either by phone or letter.

Design outcomes

Primary

Measure	Time frame	Description
Flu vaccination refusal rate	up to 6 months	Percentage of patients refusing flu vaccination prior to intervention

Secondary

Measure	Time frame	Description
Prevalence of barriers to flu vaccination	up to 6 months	Percentage of participants mentioning a determined barrier to flu vaccination
Flu vaccination acceptance rate post-intervention	up to 6 months	Percentage of patients who accept receiving the flu vaccine after receiving the intervention
Flu vaccination rate	up to 6 months	Percentage of patients who have been vaccinated after the intervention

Countries

Portugal

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026