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Campbell C, Wang T, Gillespie I, Barnes E, Matthews PC. Analysis of primary care electronic health record data of people living with hepatitis B virus: infection and hepatocellular carcinoma risk associated with socio-economic deprivation. Public Health 2024; 226:215-227. [PMID: 38091810 PMCID: PMC7615551 DOI: 10.1016/j.puhe.2023.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/28/2023] [Accepted: 10/18/2023] [Indexed: 01/15/2024]
Abstract
OBJECTIVES We set out to characterise chronic hepatitis B (CHB) in the primary care population in England and investigate risk factors for progression to hepatocellular carcinoma (HCC). STUDY DESIGN Retrospective cohort study. METHODS We identified 8039 individuals with CHB in individuals aged ≥18 years between 1999 and 2019 in the English primary care database QResearch. HCC risk factors were investigated using Cox proportional hazards modelling. RESULTS Most of those with a record of CHB were males (60%) of non-White ethnicity (>70%), and a high proportion were in the most deprived Townsend deprivation quintile (44%). Among 7029 individuals with longitudinal data, 161 HCC cases occurred. Increased HCC hazards were significantly associated with male sex (adjusted hazards ratio [aHR] 3.17, 95% confidence interval [95% CI] 1.92-5.23), in the fifth deprivation quintile as compared to the third quintile (aHR 1.69, 95% CI 1.01-2.84), with older age (for age groups 56-65 and ≥66 years, compared to 26-35 years, aHRs 2.82 [95% CI 1.45-5.46] and 3.76 [95% CI 1.79-7.9], respectively), Caribbean ethnicity (aHR 3.32, 95% CI 1.43-7.71, compared to White ethnicity), ascites (aHR 3.15, 95% CI 1.30-7.67), cirrhosis (aHR 6.55, 95% CI 4.57-9.38) and peptic ulcer disease (aHR 2.26, 95% CI 1.45-3.51). CONCLUSIONS Targeting interventions and HCC surveillance at vulnerable groups is essential to improve CHB outcomes and to support progress towards international goals for the elimination of hepatitis infection as a public health threat.
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Affiliation(s)
- C Campbell
- Nuffield Department of Medicine, University of Oxford, Oxford, UK; NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - T Wang
- Nuffield Department of Medicine, University of Oxford, Oxford, UK; NIHR Oxford Biomedical Research Centre, Oxford, UK
| | | | - E Barnes
- NIHR Oxford Biomedical Research Centre, Oxford, UK; Department of Hepatology, Oxford University Hospitals, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, UK
| | - P C Matthews
- NIHR Oxford Biomedical Research Centre, Oxford, UK; The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; Division of Infection and Immunity, University College London, Gower Street, London WC1E 6BT, UK; Department of Infectious Diseases, University College London Hospital, Euston Road, London NW1 2BU, UK.
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Campbell C, Wang T, Burrow R, Mandal S, Hippisley-Cox J, Barnes E, Matthews PC. Estimating the epidemiology of chronic Hepatitis B Virus (HBV) infection in the UK: what do we know and what are we missing? Wellcome Open Res 2022; 7:203. [PMID: 36874587 PMCID: PMC9975428.2 DOI: 10.12688/wellcomeopenres.17941.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2023] [Indexed: 03/11/2023] Open
Abstract
Background: HBV is the leading global cause of cirrhosis and primary liver cancer. However, the UK HBV population has not been well characterised, and estimates of UK HBV prevalence and/or incidence vary widely between sources. We aimed to i) extract and summarise existing national HBV prevalence estimates, ii) add a new estimate based on primary care data, and; iii) critique data sources from which estimates were derived. Methods: We undertook a narrative review, searching for national estimates of CHB case numbers in the UK (incorporating incidence, prevalence and/or test positivity data) across a range of overlapping sources, including governmental body reports, publications from independent bodies (including medical charities and non-governmental organisations) and articles in peer-reviewed scientific journals. An alternative proxy for population prevalence was obtained via the UK antenatal screening programme which achieves over 95% coverage of pregnant women. We also searched for diagnoses of HBV in the QResearch primary care database based on laboratory tests and standardised coding. Results: We identified six CHB case number estimates, of which three reported information concerning population subgroups, including number of infected individuals across age, sex and ethnicity categories. Estimates among sources reporting prevalence varied from 0.27% to 0.73%, congruent with an estimated antenatal CHB prevalence of <0.5%. Our estimate, based on QResearch data, suggests a population prevalence of ~0.05%, reflecting a substantial underestimation based on primary care records. Discussion: Estimates varied by sources of error, bias and missingness, data linkage, and "blind spots" in HBV diagnoses testing/registration. The UK HBV burden is likely to be concentrated in vulnerable populations who may not be well represented in existing datasets including those experiencing socioeconomic deprivation and/or homelessness, ethnic minorities and people born in high-prevalence countries. This could lead to under- or over-estimation of population prevalence estimation. Multi-agency collaboration is required to fill evidence gaps.
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Affiliation(s)
- Cori Campbell
- Nuffield Department of Medicine, University of Oxford, Oxford, OX1 3XY, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Tingyan Wang
- Nuffield Department of Medicine, University of Oxford, Oxford, OX1 3XY, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | | | - Sema Mandal
- Blood safety, Hepatitis, STI & HIV Division, UK Health Security Agency, London, UK
- National Institute for Health Research Health Protection Unit, London, UK
| | | | - Eleanor Barnes
- NIHR Oxford Biomedical Research Centre, Oxford, UK
- Department of Hepatology, Oxford University Hospitals, John Radcliffe Hospital, Oxford, UK
| | - Philippa C Matthews
- NIHR Oxford Biomedical Research Centre, Oxford, UK
- The Francis Crick Institute, London, UK
- Division of Infection and Immunity, University College London, London, UK
- Department of Infectious Diseases, University College London Hospitals NHS Trust, London, UK
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Campbell C, Wang T, Burrow R, Mandal S, Hippisley-Cox J, Barnes E, Matthews PC. Estimating the epidemiology of chronic Hepatitis B Virus (HBV) infection in the UK: what do we know and what are we missing? Wellcome Open Res 2022; 7:203. [PMID: 36874587 PMCID: PMC9975428 DOI: 10.12688/wellcomeopenres.17941.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/20/2022] [Indexed: 11/20/2022] Open
Abstract
Background: HBV is the leading global cause of cirrhosis and primary liver cancer. However, the UK HBV population has not been well characterised, and estimates of UK HBV prevalence and/or incidence vary widely between sources. We summarised datasets that are available to represent UK CHB epidemiology, considering differences between sources, and discussing deficiencies in current estimates. Methods: We searched for estimates of CHB case numbers in the UK (incorporating incidence and/or prevalence-like data) across a range of available sources, including UK-wide reports from government bodies, publications from independent bodies (including medical charities and non-governmental organisations) and articles in peer-reviewed scientific journals to collate estimated positivity rates. An alternative proxy for population prevalence was obtained via the UK antenatal screening programme which achieves over 95% coverage of pregnant women. Results: We identified six CHB case number estimates, of which three reported information concerning population subgroups, including number of infected individuals across age, sex and ethnicity categories. Estimates among sources reporting prevalence varied from 0.27% to 0.73%, congruent with an estimated antenatal CHB prevalence of <0.5%. Discussion: Estimates varied by sources of error, bias and missingness, data linkage, and substantial "blind spots" in consistent testing and registration of HBV diagnoses. The HBV burden in the UK is likely to be concentrated in vulnerable populations who may not be well represented in existing datasets including those experiencing socioeconomic deprivation, ethnic minorities, people experiencing homelessness and people born in high-prevalence countries. Together, these factors could lead to either under- or over-estimation of overall prevalence, and additional efforts are required to provide estimates that best reflect the whole population. Multi-parameter evidence synthesis and back-calculation model methods similar to those used to generate estimates of HCV ad HIV population-wide prevalence may be applicable to HBV.
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Affiliation(s)
- Cori Campbell
- Nuffield Department of Medicine, University of Oxford, Oxford, OX1 3XY, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Tingyan Wang
- Nuffield Department of Medicine, University of Oxford, Oxford, OX1 3XY, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | | | - Sema Mandal
- Blood safety, Hepatitis, STI & HIV Division, UK Health Security Agency, London, UK
- National Institute for Health Research Health Protection Unit, London, UK
| | | | - Eleanor Barnes
- NIHR Oxford Biomedical Research Centre, Oxford, UK
- Department of Hepatology, Oxford University Hospitals, John Radcliffe Hospital, Oxford, UK
| | - Philippa C Matthews
- NIHR Oxford Biomedical Research Centre, Oxford, UK
- The Francis Crick Institute, London, UK
- Division of Infection and Immunity, University College London, London, UK
- Department of Infectious Diseases, University College London Hospitals NHS Trust, London, UK
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Campbell C, Wang T, McNaughton AL, Barnes E, Matthews PC. Risk factors for the development of hepatocellular carcinoma (HCC) in chronic hepatitis B virus (HBV) infection: a systematic review and meta-analysis. J Viral Hepat 2021; 28:493-507. [PMID: 33305479 PMCID: PMC8581992 DOI: 10.1111/jvh.13452] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 02/06/2023]
Abstract
Hepatocellular carcinoma (HCC) is one of the leading contributors to cancer mortality worldwide and is a leading cause of death in individuals with chronic hepatitis B virus (HBV) infection. It is uncertain how the presence of other metabolic factors and comorbidities influences HCC risk in HBV. Therefore, we performed a systematic literature review and meta-analysis to seek evidence for significant associations. MEDLINE, EMBASE and Web of Science databases were searched from 1 January 2000 to 24 June 2020 for studies investigating associations of metabolic factors and comorbidities with HCC risk in individuals with chronic HBV infection, written in English. We extracted data for meta-analysis and generated pooled effect estimates from a fixed-effects model. Pooled estimates from a random-effects model were also generated if significant heterogeneity was present. We identified 40 observational studies reporting on associations of diabetes mellitus (DM), hypertension, dyslipidaemia and obesity with HCC risk. Only DM had a sufficient number of studies for meta-analysis. DM was associated with >25% increase in hazards of HCC (fixed-effects hazards ratio [HR] 1.26, 95% confidence interval (CI) 1.20-1.32, random-effects HR 1.36, 95% CI 1.23-1.49). This association was attenuated towards the null in a sensitivity analysis restricted to studies adjusted for metformin use. In conclusion, in adults with chronic HBV infection, DM is a significant risk factor for HCC, but further investigation of the influence of antidiabetic drug use and glycaemic control on this association is needed. Enhanced screening of individuals with HBV and diabetes may be warranted.
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Affiliation(s)
- Cori Campbell
- Nuffield Department of MedicineUniversity of OxfordOxfordUK
| | - Tingyan Wang
- Nuffield Department of MedicineUniversity of OxfordOxfordUK
| | | | - Eleanor Barnes
- Nuffield Department of MedicineUniversity of OxfordOxfordUK,Department of HepatologyOxford University NHS Foundation TrustJohn Radcliffe HospitalOxfordUK
| | - Philippa C. Matthews
- Nuffield Department of MedicineUniversity of OxfordOxfordUK,Department of Infectious Diseases and MicrobiologyOxford University Hospitals NHS Foundation TrustJohn Radcliffe HospitalOxfordUK,NIHR BRCJohn Radcliffe HospitalOxfordUK
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