Adjuvanted Influenza Vaccination Year 2 Follow-On Survey

Adjuvanted Influenza Vaccination and Morbidity and Mortality in U.S. Nursing Homes: Assessment of Vaccine Selection and Outcomes for the Follow-on Study Year

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT03599739

Enrollment

598

Registered

2018-07-26

Start date

2018-07-13

Completion date

2023-01-25

Last updated

2023-03-16

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

Conditions

Influenza, Influenza, Human, Influenza-like Illness

Keywords

Influenza, Vaccine, Vaccination, Nursing Home, Respiratory-Related Hospitalizations

Brief summary

The purpose of this study is to determine if different influenza vaccines produce different outcomes in nursing facility residents receiving the required annual influenza vaccination.

Detailed description

This study will enroll facilities who participated in the adjuvanted influenza vaccine study in 2016-2017 to document the vaccine choice for the 2017-2018 influenza season through a survey. Additional facilities will be enrolled that did not participate to answer a survey responding to questions regarding the vaccine choice for the 2017-2018 and 2018-2019 flu season. Both groups will also gather information on vaccination rates for residents and staff, policies and procedures, and influenza outbreaks. The facility will complete a profile and answer questions regarding influenza vaccination in their facilities for the 2017-2018 and 2018-2019 flu seasons. The study team will obtain data from the Centers for Medicare & Medicaid Services in 2019 to determine the study outcomes. None of the data used in the analysis will be linked to individual residents in facilities.

Interventions

BIOLOGICALInfluenza

Facilities will be asked to complete a survey to evaluate the impact of the influenza vaccine choice on hospitalization risk for the 2017-2018 influenza season.

Study design

Observational model

COHORT

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

65 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Participated in the Adjuvanted Influenza Vaccination and Morbidity and Mortality in U.S. Nursing Homes study * OR * Long-term care facilities within 75 miles of one of the 121 cities that serve as CDC surveillance sites

Exclusion criteria

* Facilities having fewer than 50 long-stay residents * Hospital based facilities * Facilities with more than 20% of the population under age 65 * Facilities not submitting Minimum Data Set (MDS) data

Design outcomes

Primary

Measure	Time frame	Description
Hospitalization for all causes	up to 1 year	Time to first occurrence of hospitalization for all-causes.

Countries

United States

Outcome results

None listed

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