Non-vaccination Factors Against Hepatitis B Virus in Drug Users (ANOVAC B)

September 16, 2019 updated by: Hospices Civils de Lyon

Analysis of Non-vaccination Factors Against Hepatitis B Virus (HBV) in Drug Users Consulting at the Croix-rousse Drug Addict Care Center (Annuaire Centres de Soins, d'Accompagnement et de prévention en Addictologie (CSAPA))

Hepatitis B is one of the major public health problems in the world. According to World Health Organization (WHO) data, about 2 billion people have been in contact with the hepatitis B virus (HBV), and 257 million have chronic HBV infection.

Although France is a low endemic country, with just over 280,000 people with chronic infection, hepatitis B remains a public health problem due to its morbidity and mortality.

Drug users are a population at risk by their consumption practices (injection or sniffing), but also by other high-risk behaviours, particularly sexual behaviours.

Prevention therefore involves securing consumption practices (sterile and single-use equipment) and protection of sexual intercourse, but also by vaccination (protecting more than 90%).

Since 1982, HAS has recommended to systematically vaccinate drug users. However, according to the Marmottan study published in 2003, immunization coverage among drug addicts was already insufficient in 1999 (45.3%) and decreased again in 2000 and 2001 (15.6 and 21.7%).

This decrease can be explained by the controversy around the potential link, now refuted, between vaccine against HBV and demyelination, which has stopped the mass vaccination campaign launched by the French health authorities in 1995.

A study conducted between 2009 and 2012 on injecting drug users in Alsace, estimated vaccination coverage at 28%.

The hypothesize is that despite the recommendations in a population at high risk of contamination, and a balance of benefits and risks in favor of vaccination, vaccination coverage against the hepatitis B virus remains insufficient among drug users because of poor vaccination acquaintance, and hepatitis B in general, in this population.

Principal objective of this study is to identify non-vaccination factors against hepatitis B virus among drug users consulting at the Croix-Rousse CSAPA.

Study Overview

Status

Completed

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

137

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Lyon, France, 69004
        • Hôpital de la Croix-Rousse, 103 grande rue de la Croix-Rousse

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Adult patients drug users, substituted / weaned or not, consulting at the Croix-Rousse CSAPA

Description

Inclusion Criteria:

  • Adults (age ≥ 18 years)
  • Patients with an addiction with product, substituted / weaned or not
  • Patients consulting at the CSAPA of the Croix-Rousse hospital

Exclusion Criteria:

  • Patients with an addiction without a product
  • Patients who have never snorted or injected psychoactive product
  • Patients protected by the law
  • Patient refusing to participate to the study

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
Drug users
The cohort will be constituted of adult patients drug users, substituted/weaned or not, consulting at the Croix-Rousse CSAPA
The socio-demographic characteristics of patients, their current and past drug use as well as their knowledge of hepatitis B and vaccination, will be collected via a questionnaire, conducted by the service's addictologists at the beginning of the consultation.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
comparison of the characteristics of patients vaccinated and unvaccinated against hepatitis B
Time Frame: One day
These data will be collected via a questionnaire with questions of patient socio-demographic characteristics, as well as their knowledge of hepatitis B and vaccination.
One day

Collaborators and Investigators

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

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 (Actual)

April 10, 2019

Primary Completion (Actual)

September 4, 2019

Study Completion (Actual)

September 4, 2019

Study Registration Dates

First Submitted

January 23, 2019

First Submitted That Met QC Criteria

January 23, 2019

First Posted (Actual)

January 25, 2019

Study Record Updates

Last Update Posted (Actual)

September 17, 2019

Last Update Submitted That Met QC Criteria

September 16, 2019

Last Verified

September 1, 2019

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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