Evidence map›Paper›PMID 30531175›Full record

ArticleAnnals of Saudi medicine

Persistence of hepatitis B surface antibody and immune memory to hepatitis B vaccine among medical college students in Madinah.

Waleed Mahallawi

Open access · diamondAbstract read
In one paragraph

Article in Annals of Saudi medicine. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.3field-weighted citation impact, top 19% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 23 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author at 1 institution in 2 countries.

Waleed MahallawiDr. Waleed Mahallawi, Clinical Laboratory Sciences,, Taibah University,, Prince Naif St. Madinah 42362,, Saudi Arabia, T: +966-14-8618888 ext: 3666, wmahallawi@gmail.com, ORCID: http://orcid.org/0000-0001.6977-9006.
Taibah University · SA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGlobally, about 300 million people are infected with hepatitis B virus (HBV). Among the effective approaches to fight HBV infection is immunization. In 1989, an obligatory hepatitis B vaccine program was launched in Saudi Arabia.

objectiveAssess hepatitis B surface antibody (anti-HBs) levels among the medical students before and after receiving booster doses of HBV vaccine.

designCross-sectional.

settingTaibah University. SUBJECTS AND

methodsStudents born between 1993 and 1995 were recruited in this study from the Occupational Health Clinic. Students were screened for anti-HBs levels using chemiluminescent microparticle immunoassay (CMIA) before and after booster HBV vaccine doses.

main outcome measuresAnti-HBs levels before and after booster doses. SAMPLE SIZE: 335.

resultsAbout half of participants (n=164, 49%) had protective anti-HBs levels ( greater than or equal 10 mIU/mL) to the original primary series of HBV vaccine and received no booster doses. The reimaining 171 (51%) participants were at risk of HBV infection since their anti-HBs levels were less than 10 mIU/mL, despite having received the original primary HBV vaccine. The levels of anti-HBs were higher in female than in male students (P less than .001). In addition, female students showed a stronger humoral immune response to the booster vaccine than male students (P less than .001). When participants were given the three boosters, most participants (98.3%) showed anti-HBs levels of greater than or equal 10 mIU/mL. The results also showed a strong correlation between pre-booster and post-booster anti-HBs levels in the greater than or equal 10 mIU/mL group (r2= 0.52, P less than .001) but not in less than 10 mIU/mL group (r2= 0.003, P=.53).

conclusionA considerable portion of the participants (about 51%) were at risk of HBV infection since their anti-HBs levels were less than 10 mIU/mL. Booster doses significantly trigger memory immune response and this ensured their protection against the virus. Pre-booster anti-HBs level are a good predictive of post-booster anti-HBs levels in greater than or equal 10 mIU/mL group. LIMITATIONS: The sample size was small. Shortage of collaborators. CONFLICT OF INTEREST: None.

Indexed as

Hepatitis BAdultDose-Response Relationship, DrugFemaleHepatitis B AntibodiesHepatitis B Surface AntigensHepatitis B VaccinesHepatitis B virusHumansImmunity, HumoralImmunization, SecondaryImmunologic MemoryMaleRisk AssessmentSaudi ArabiaSex FactorsHepatitis B AntibodiesHepatitis B Surface AntigensHepatitis B Vaccines

Identifiers

PMID30531175
PMCPMC6302994
OpenAlexW2906563020

What OpenQuestion holds

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LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.