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Stop Hep B @ Birth

3 augusti 2021 uppdaterad av: Khin Pyone Kyi, Myanmar Liver Foundation

Stop Hep B @ Birth: Community-Oriented Care Model for the Prevention of Mother-To-Child Transmission of Hepatitis B in Peri-Urban Yangon

Single arm, prospective open-label study of a care model consisting of two components: Component I aims to achieve high coverage of interventions to prevent maternal-to-child transmission of hepatitis B virus: antenatal tenofovir, and timely newborn administration of hepatitis B birth dose vaccine and hepatitis B immune globulin; Component II aims to achieve high coverage of screening, vaccination, and anti-viral therapy for HBV among household members of women with chronic HBV infection.

Studieöversikt

Status

Rekrytering

Betingelser

Intervention / Behandling

Detaljerad beskrivning

An estimated 248 million people worldwide are chronically infected with hepatitis B virus (HBV); and 75% of them live in Asia. Mother-to-child transmission (MTCT) accounts for the majority of chronic hepatitis B infections in Southeast Asia. Elimination of MTCT of HBV is theoretically possible with a comprehensive suite of interventions that includes birth dose vaccination, hepatitis B immune globulin, and antenatal antiviral therapy (e.g., tenofovir). However, the ideal gestational age to initiate antenatal tenofovir remains undefined; and evidence is lacking for implementation strategies capable of providing cost-effective, equitable access to a comprehensive suite of interventions to prevent MTCT of HBV in low-resource settings.

Component I: Prevention of Vertical Transmission Pregnant women living in the study area will be identified and screened for hepatitis B by a network of antenatal care (ANC) providers and existing community outreach workers; HBsAg positive patients will be invited to participate in the study. Consenting participants will provide serum samples to assess eligibility for anti-viral therapy: creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), platelet count, HCV, HIV. Pregnant women eligible for antiviral therapy according to WHO criteria, or who have viral load (VL) >200,000 IU/mL, will be treated with tenofovir starting at 20 weeks gestation through 4 weeks postpartum. Hospital-based delivery will be encouraged. All newborns, including those delivered at home, will receive the HBV birth dose vaccine within 24 hours of delivery, and newborns of women on tenofovir treatment will also receive Hepatitis B Immunoglobulin within 24 hours after delivery. Children will be linked to routine immunization services in Myanmar to complete their HBV vaccination series (HBV is co-formulated in a pentavalent vaccine). Maternal VL will be measured at delivery; infants will be tested for hepatitis B infection at 24-28 weeks postpartum.

Component II -- Household Screening and Treatment The household members of HBsAg positive pregnant women who consent to participate in the study will be screened for HBV-related immune status and chronic HBV infection. Non-immune individuals (HBsAb/Ag negative) will be vaccinated; HBsAg positive household members will be assessed for treatment eligibility and initiated on anti-viral therapy according to World Helath Organization guidelines. Eligible household members will also be screened every six months for hepatocellular carcinoma (HCC) by liver ulatrasound and alpha-fetoprotein levels

Qualitative Study:

In-depth interviews with approximately 30 HBsAg-positive women, 30 HBVsAg-negative women, and 20 household members of study participants will be conducted to assess barriers and facilitators related to HBV testing and treatment. Approximately 15 key-informant interviews with healthcare providers and community leaders will also be conducted. Sample size will depend on data saturation and will be adjusted based on results of data analysis during the study.

Studietyp

Interventionell

Inskrivning (Förväntat)

110

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

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Studieorter

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Barn
  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • Pregnant women >= 18 years of age
  • Gestational age =<34 weeks
  • Test positive for HBsAg
  • Live in study site area in South Dagon and Dagon Seikkan Townships, Yangon Region
  • Give informed consent to participate in the study
  • Newborns and household members of pregnant women enrolled in the study according to previous inclusion criteria

Exclusion Criteria:

  • Alanine aminotransferase (ALT) levels >300 IU/L

For qualitative study:

Inclusion criteria

  • Key informants (e.g., healthcare providers and community leaders in the study area) OR
  • HBsAg+ women and their household members in the study area
  • HBsAg- women and their household members in the stud area
  • Give informed consent to participate in the study
  • History of renal dysfunction
  • CrCL < 50mL/min
  • ALT>5 times the upper limit of normal (ULN)
  • Evidence of decompensated cirrhosis (e.g., jaundice, ascites, history of upper gastrointestinal bleeding/esophageal varices, and hepatic encephalopathy)
  • Any concomitant condition or treatment that, in view of the clinical site investigator, would contraindicate participation or satisfactory follow-up in the study HIV positive status unless 1) they are currently on additional ART therapy, or 2) their viral load is demonstrated to be <50 copies. Women who are newly diagnosed with HIV and referred to start a TDF-based regimen may be considered eligible once they have started the TDF-based regimen.
  • Concurrent participation in any other clinical trial without written agreement of the study team
  • Does not intend to deliver within catchment area, and/or intends to migrate before newborn follow-up is complete

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Förebyggande
  • Tilldelning: N/A
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Tenofovir Disoproxil Fumerate
Pregnant women (>=20 weeks of gestation) will be treated with TDF if clinically eligible; newborns will receive birth dose vaccine (and HBIG if eligible). Non-eligible women will be treated according to normal practices; newborns will still receive birth dose vaccine.
Läkemedel: Tenofovir Disoproxil Fumarate 300 mg daily; HBV birth dose vaccine; hepatitis B immune globulin (HBIG)
Antenatal screening for HBV, anti-viral treatment with tenofovir according to treatment eligibility criteria, and birth dose vaccination at delivery to prevent mother-to-child transmission of HBV
Andra namn:
  • Viread
Läkemedel: Regular Myanmar treatment
Treated according to normal Myanmar processes for HBV positive patients

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Vaccine within 24 hours
Tidsram: Within 24 hours of birth
Proportion of newborns of HBsAg positive mothers receiving HBV vaccine within 24 hours of birth
Within 24 hours of birth
Effective treatment of pregnant women
Tidsram: During pregnancy (until delivery) of each woman, average of 9 months

Proportions of pregnant women with chronic HBV (HBsAg positive) who are (a) linked to care (attend BK Kee Clinic for assessment of treatment eligibility); (b) complete TDF eligibility testing; (c) initiate tenofovir treatment (TDF, among those eligible); (d) adhere to TDF treatment until delivery and (e) continue treatment until 4 weeks post-partum

o Low/medium/high high medication adherence are defined, respectively, as ≤6, 6-7 or 8 points on the Morisky Medication Adherence Scale (MMAS-8)
During pregnancy (until delivery) of each woman, average of 9 months
Household contact screening
Tidsram: Upon identification of participating women, until the end of the project, average of 1 year
Proportions of adult household contacts who (a) are screened for chronic HBV infection and immunity (HBsAg/Ab); (b) are linked to care (among HBsAg positive) or vaccinated (if HBsAb negative); (c) complete appropriate testing for hepatocellular carcinoma (HCC) screening, (d) eligible for TDF treatment; (e) initiate chronic HBV treatment with TDF
Upon identification of participating women, until the end of the project, average of 1 year

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Total screening of mothers
Tidsram: During pregnancy (until delivery) of each woman, average of 9 months

Proportion of pregnant women in the target population who are:

  • screened for HBsAg (denominator estimated from population census counts and crude birth rate)
  • HBsAg positive (chronic HBV prevalence among women attending ANC)
During pregnancy (until delivery) of each woman, average of 9 months
Antenatal care for HBV positive pregnant mothers
Tidsram: During pregnancy (until delivery) of each woman, average of 9 months

Proportions of pregnant women with chronic HBV who:

  • attend their first antenatal care (ANC) visit prior to 20, 24, 28 and 32 weeks gestation
  • are eligible for TDF (HBV VL >200,00 IU/mL or WHO criteria)
  • are HBeAg positive
  • deliver at home
During pregnancy (until delivery) of each woman, average of 9 months
Vaccination of HBV negative pregnant mothers
Tidsram: During pregnancy (until delivery) of each woman, average of 9 months
Proportion of women who tested negative for HBsAg and HBsAb at baseline who complete the HBV vaccination schedule
During pregnancy (until delivery) of each woman, average of 9 months
Treatment of high viral load pregnant mothers
Tidsram: At delivery; during antenatal care testing; at 4 months postpartum, throughout the project, average of 12 months

Among women who had VL>200,000 IU/mL at baseline and were eligible for TDF treatment:

  • the proportion that achieve viral suppression (HBV DNA <200,000 IU/mL) at delivery
  • the proportion who are HBeAg positive
  • proportion with HBV flare 4 months postpartum (ALT >300 IU/L)
At delivery; during antenatal care testing; at 4 months postpartum, throughout the project, average of 12 months
Viral suppression
Tidsram: At delivery, throughout the project (one off)
Associations of maternal viral suppression (VL <200,000 at delivery and: baseline HBV VL, duration of exposure to TDF, and TDF adherence
At delivery, throughout the project (one off)
Mother-to-child transmission
Tidsram: At 28 weeks postpartum, throughout the project (one off)

Proportion of infants born to HBsAg positive mothers who

  • complete the HBV vaccination series within the recommended intervals
  • are HBsAg positive or with measurable HBV VL at 28 weeks postpartum (rate of mother-to-child transmission of HBV)
At 28 weeks postpartum, throughout the project (one off)
Household screening
Tidsram: At household screening, throughout the project (one off)

Among household members screened for HBsAg and HBsAb:

o Prevalence of chronic infection (% HBsAg positive); and immune status (% HBsAb positive and HBsAg negative)
At household screening, throughout the project (one off)

Andra resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Completed vaccination courses
Tidsram: Before age 1, average of 1 year
Proportion of infants of HBsAg positive mothers who complete HBV vaccination prior to study termination, before and after coronavirus- and coup- related delays in public vaccination program
Before age 1, average of 1 year
Proportion of pregnant women with HBsAg identified by surveillance team members
Tidsram: During pregnancy, average of 9 months
Proportion of pregnant women with HBsAg identified by surveillance team members
During pregnancy, average of 9 months
Timeliness of pregnancy surveillance
Tidsram: During pregnancy, average of 9 months

Among pregnant women identified by surveillance team members:

  • Proportion who are linked to care and screened for HBsAg
  • Proportions identified prior to gestational age of 20, 24, 28 and 32 weeks
During pregnancy, average of 9 months
Equity of intervention
Tidsram: During pregnancy and in first year after delivery, average of 16 months
Distributions of select outcomes according to age, sex and axes of social disadvantage: household wealth; educational attainment; occupation; and ethnic/religious affiliation
During pregnancy and in first year after delivery, average of 16 months

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Myanmar Liver Foundation

Utredare

  • Huvudutredare: Khin Phone Kyi, MD, Myanmar Liver Foundation
  • Huvudutredare: Adam K Richards, MD, University of California, Los Angeles

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

1 juli 2018

Primärt slutförande (Förväntat)

30 december 2021

Avslutad studie (Förväntat)

30 juni 2023

Studieregistreringsdatum

Först inskickad

19 januari 2021

Först inskickad som uppfyllde QC-kriterierna

3 augusti 2021

Första postat (Faktisk)

10 augusti 2021

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

10 augusti 2021

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

3 augusti 2021

Senast verifierad

1 augusti 2021

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • HBV2020

Plan för individuella deltagardata (IPD)

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IPD-planbeskrivning

The investigators are currently developing an individual participant data (IPD) sharing plan.

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