Influenza Burden Assessment in the United States, July1997 - up to April 2009

February 21, 2013 updated by: GlaxoSmithKline

Burden of Influenza in the United States, July 1997 up to April 2009

The study will assess the burden of severe influenza outcomes by age, risk status, and influenza subtype, in order to create a profile of the burden of influenza-related morbidity and mortality in United States from July 1997 to April 2009.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This epidemiological study is a modelling of time series retrospectively extracted from multiple databases. Data will be extracted from existing electronic healthcare databases.

Study Type

Observational

Enrollment (Actual)

1

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

All records of people in the US in the Nationwide Inpatient Sample (NIS) hospitalization data or in the US mortality data will be included in this study.

Description

Inclusion Criteria:

  • Recorded in the US NIS hospitalization data or the US National Vital Statistics System (NVSS) mortality data with a pre-specified diagnostic code.

Exclusion Criteria:

  • Missing data in the following fields: age, primary discharge diagnosis, admission month (NIS) /month of death (NVSS), and status at discharge (alive / dead).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Influenza Group
Other: Data collection

The study will use multiple primary data sources: the Nationwide Inpatient Sample (for hospitalisations) and the US National Vital Statistics System (for mortality), and weekly virology data from the Centers for Disease Control and Prevention (CDC) influenza surveillance program supplemented with literature data.

Weekly time series of the rates of various severe influenza-related health outcomes will be constructed. Statistical models, guided by weekly numbers of cases of laboratory-confirmed influenza and respiratory syncytial virus (RSV) contained in the CDC virology data, will be constructed to estimate the portions of the various outcomes that can be attributed to influenza. Next, the seasonal impact of influenza by age, risk status, and influenza subtype will be assessed. Finally, the potential burden that a quadrivalent vaccine could have prevented over the 12 year study period will be predicted.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Occurrences of potentially influenza-attributable hospitalization or death by age, risk status, region and season.
Time Frame: From July 1997 to April 2009 (i.e., up to almost 12 years)
From July 1997 to April 2009 (i.e., up to almost 12 years)
Amount of circulating influenza A and B, and RSV strains determined for each season.
Time Frame: From July 1997 to April 2009 (i.e., up to almost 12 years)
From July 1997 to April 2009 (i.e., up to almost 12 years)

Secondary Outcome Measures

Outcome Measure
Time Frame
Influenza vaccine content and effectiveness by season.
Time Frame: From July 1997 to April 2009 (i.e., up to almost 12 years)
From July 1997 to April 2009 (i.e., up to almost 12 years)
Influenza vaccine coverage by season.
Time Frame: From July 1997 to April 2009 (i.e., up to almost 12 years)
From July 1997 to April 2009 (i.e., up to almost 12 years)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

GlaxoSmithKline

Collaborators

Sage Analytica

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2012

Primary Completion (Actual)

February 1, 2013

Study Completion (Actual)

February 1, 2013

Study Registration Dates

First Submitted

May 14, 2012

First Submitted That Met QC Criteria

May 14, 2012

First Posted (Estimate)

May 16, 2012

Study Record Updates

Last Update Posted (Estimate)

February 25, 2013

Last Update Submitted That Met QC Criteria

February 21, 2013

Last Verified

February 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 116730 (Western University's Research Ethics Board)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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