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1.
PLOS Glob Public Health ; 3(5): e0001018, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37126484

RESUMEN

COVID-19 pandemic puts an enormous strain on health care systems worldwide and may have a detrimental effect on prevention, treatment and outcomes of tuberculosis (TB), viral hepatitis, HIV/AIDS and malaria, whose ending is part of the United Nations 2030 Agenda for Sustainable Development. We conducted a systematic review of scientific and grey literature in order to collect wide-ranging evidence with emphasis on quantification of the projected and actual indirect impacts of COVID-19 on the four infectious diseases with a global focus. We followed PRISMA guidelines and the protocol registered for malaria (CRD42021234974). We searched PubMed, Scopus, preView (last search: January 13, 2021) and websites of main (medical) societies and leading NGOs related to each of the four considered infectious diseases. From modelling studies, we identified the most impactful disruptions; from surveys and other quantitative studies (based e.g. on surveillance or program data), we assessed the actual size of the disruptions. The identified modelling studies warned about under-diagnosis (TB), anti-retroviral therapy interruption/decrease in viral load suppression (HIV), disruptions of insecticide-treated nets (ITN) distribution and access to effective treatment (malaria), and treatment delays and vaccination interruptions (viral hepatitis). The reported disruptions were very heterogeneous both between and within countries. If observed at several points in time, the initial drops (partly dramatic, e.g. TB notifications/cases, or HIV testing volumes decreased up to -80%) were followed by a gradual recovery. However, the often-missing assessment of the changes against the usual pre-pandemic fluctuations hampered the interpretation of less severe ones. Given the recurring waves of the pandemic and the unknown mid- to long-term effects of adaptation and normalisation, the real consequences for the fight against leading infectious diseases will only manifest over the coming years.

2.
BMC Infect Dis ; 22(1): 500, 2022 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-35624437

RESUMEN

BACKGROUND: There remain gaps in quantifying mortality risk among individuals co-infected with chronic hepatitis B (HBV) and human immunodeficiency virus (HIV) in sub-Saharan African contexts. Among a cohort of HIV-positive individuals in Rwanda, we estimate the difference in time-to mortality between HBV-positive (HIV/HBV co-infected) and HBV-negative (HIV mono-infected) individuals. METHODS: Using a dataset of HIV-infected adults screened for hepatitis B surface antigen (HBsAg) from January to June 2016 in Rwanda, we performed time-to-event analysis from the date of HBsAg results until death or end of study (31 December 2019). We used the Kaplan-Meier method to estimate probability of survival over time and Cox proportional hazard models to adjust for other factors associated with mortality. RESULTS: Of 21,105 available entries, 18,459 (87.5%) met the inclusion criteria. Mean age was 42.3 years (SD = 11.4) and 394 (2.1%) died during follow-up (mortality rate = 45.7 per 100,000 person-months, 95% confidence interval (CI) 41.4-50.4) Mortality rate ratio for co-infection was 1.7, 95% CI 1.1-2.6, however, Cox regression analysis did not show any association with mortality between compared groups. The adjusted analysis of covariates stratified by co-infection status showed that males, residing outside of the capital Kigali, drinking alcohol, WHO-HIV-clinical stage 3 and 4 were associated with increased mortality in this HIV cohort. CONCLUSIONS: HBV infection does not significantly influence mortality among HIV-infected individuals in Rwanda. The current cohort is likely to have survived a period of high-risk exposure to HBV and HIV mortality and limited health care until their diagnosis.


Asunto(s)
Coinfección , Infecciones por VIH , Hepatitis B Crónica , Adulto , Coinfección/complicaciones , Infecciones por VIH/complicaciones , Antígenos de Superficie de la Hepatitis B , Virus de la Hepatitis B , Hepatitis B Crónica/complicaciones , Humanos , Masculino , Rwanda/epidemiología
3.
JMIR Mhealth Uhealth ; 9(5): e26289, 2021 05 07.
Artículo en Inglés | MEDLINE | ID: mdl-33960950

RESUMEN

BACKGROUND: For the safety monitoring of vaccinations postlicensure, reports of adverse events after immunization (AEFIs) are crucial. New technologies such as digital mobile apps can be used as an active approach to capture these events. We therefore conducted a feasibility study among recipients of the influenza vaccination using an app for assessment of the reporting of AEFIs. OBJECTIVE: The goal of the research was to determine factors influencing adherence to and correct use of a newly developed app for individuals to report AEFI for 3 months using regular reminder functions, to identify determinants of AEFI occurrence and define reported AEFI types. METHODS: We developed the app (SafeVac) and offered it to recipients of the influenza vaccination in 3 occupational settings in fall 2018. In this prospective longitudinal feasibility study, data on AEFIs were generated through SafeVac for 3 months. Using logistic and Cox regression, we assessed associations between app adherence, correct app entry, AEFIs, and sociodemographic parameters. RESULTS: Of the individuals who logged into SafeVac, 61.4% (207/337) used the app throughout a 3-month period. App use adherence was negatively associated with female sex (odds ratio [OR] 0.47; CI 0.25-0.91) and correct app entry was negatively associated with older age (OR 0.96; CI 0.93-0.99) and lower education (OR 0.31; CI 0.13-0.76). AEFI occurrence was associated with female sex (hazard ratio 1.41; CI 1.01-1.96) and negatively with older age (hazard ratio 0.98; CI 0.97-0.99). The most common AEFIs reported were injection site pain (106/337), pain in extremity (103/337), and fatigue/asthenia (73/337). CONCLUSIONS: Digital AEFI reporting was feasible with SafeVac and generated plausible results for this observation period and setting. Studies directly comparing SafeVac with conventional passive reporting schemes could determine whether such digital approaches improve completeness, timeliness, and sensitivity of vaccine vigilance. Further studies should evaluate if these results are transferable to other vaccinations and populations and if introduction of such a tool has an influence on vaccination readiness and therefore vaccine safety.


Asunto(s)
Gripe Humana , Aplicaciones Móviles , Telemedicina , Sistemas de Registro de Reacción Adversa a Medicamentos , Anciano , Estudios de Factibilidad , Femenino , Humanos , Gripe Humana/prevención & control , Estudios Prospectivos , Vacunación/efectos adversos
4.
Artículo en Alemán | MEDLINE | ID: mdl-32185449

RESUMEN

BACKGROUND: Infectious diseases continue to play an important role for disease perception, health-economic considerations and public health in Germany. In recent years, infectious diseases have been linked to the development of non-communicable diseases. Analyses of the German National Cohort (GNC) may provide deeper insights into this issue and pave the way for new targeted approaches in disease prevention. OBJECTIVES: The aim was to describe the tools used to assess infectious diseases and to present initial data on infectious disease frequencies, as well as to relate the GNC assessment tools to data collection methods in other studies in Germany. METHODS: As part of the baseline examination, questions regarding infectious diseases were administered using both an interview and a self-administered touchscreen questionnaire. Data from the initial 101,787 GNC participants were analysed. RESULTS: In the interview, 0.2% (HIV/AIDS) to 8.6% (shingles) of respondents reported ever having a medical diagnosis of shingles, postherpetic neuralgia (in cases where shingles was reported), hepatitis B/C, HIV/AIDS, tuberculosis or sepsis if treated in hospital. In the questionnaire, 12% (cystitis) to 81% (upper respiratory tract infections) of respondents reported having experienced at least one occurrence of upper or lower respiratory tract infections, gastrointestinal infections, cystitis or fever within the past 12 months. OUTLOOK: The cross-sectional analyses of data and tools presented here - for example on determinants of susceptibility to self-reported infections - can be anticipated from the year 2021 onward. Beyond that, more extensive research into infectious disease epidemiology will follow, particularly once analyses of GNC biological materials have been performed.


Asunto(s)
Enfermedades Transmisibles/epidemiología , Estudios de Cohortes , Estudios Transversales , Alemania/epidemiología , Humanos , Autoinforme , Encuestas y Cuestionarios
5.
Genes (Basel) ; 9(10)2018 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-30326600

RESUMEN

Hepatitis B virus (HBV) is divided into nine genotypes, A to I. Currently, it remains unclear how the individual genotypes contribute to the estimated 250 million chronic HBV infections. We performed a literature search on HBV genotyping data throughout the world. Over 900 publications were assessed and data were extracted from 213 records covering 125 countries. Using previously published HBV prevalence, and population data, we approximated the number of infections with each HBV genotype per country and the genotype distribution among global chronic HBV infections. We estimated that 96% of chronic HBV infections worldwide are caused by five of the nine genotypes: genotype C is most common (26%), followed by genotype D (22%), E (18%), A (17%) and B (14%). Genotypes F to I together cause less than 2% of global chronic HBV infections. Our work provides an up-to-date analysis of global HBV genotyping data and an initial approach to estimate how genotypes contribute to the global burden of chronic HBV infection. Results highlight the need to provide HBV cell culture and animal models that cover at least genotypes A to E and represent the vast majority of global HBV infections to test novel treatment strategies.

6.
J Infect ; 77(6): 544-552, 2018 12.
Artículo en Inglés | MEDLINE | ID: mdl-30268515

RESUMEN

OBJECTIVES: Reliable epidemiologic estimates of Hepatitis E Virus (HEV) infection and evidence on factors determining country-differences are sparse. We systematically assessed and extracted research data on three HEV infection markers and identified factors influencing HEV-positivity to generated adjusted EU/EEA country-specific estimates by a meta-analysis. METHODS: Reports on HEV published 2005-2015 for EU/EEA countries were obtained from PubMed, Embase, Scopus, and Cochrane databases. Utilizing data on anti-HEV IgG, IgM and HEV-RNA we estimated HEV sero-prevalence, recent and acute HEV infections. Respective magnitude of factors influencing HEV-positivity was characterized using deviance. Country-specific estimates were generated by multivariable logistic regression. RESULTS: Of 4980 records, 165 covering 18 EU/EEA countries met inclusion criteria. The majority of collected data were published for Germany, France, United Kingdom, The Netherlands, and Spain. Most influential factor for anti-HEV IgG was the assay used (42% of total deviance); IgM and HEV-RNA were predominately determined by studied population (34%, 74%). Adjusted country-specific estimates for anti-HEV IgG ranged from 1.82%-17.06%, IgM 0.14%-6.54%, and HEV-RNA 0.00%-0.10%. No general geographical pattern of HEV-positivity was visible. CONCLUSIONS: Our analysis revealed a high heterogeneity regarding data availability and HEV-seropositivity across EU/EEA countries. Determinants of HEV-estimates including assay are to be considered when interpreting HEV-epidemiology and its burden.


Asunto(s)
Anticuerpos Antihepatitis/sangre , Hepatitis E/epidemiología , Europa (Continente)/epidemiología , Francia/epidemiología , Alemania/epidemiología , Virus de la Hepatitis E , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina M/sangre , Países Bajos/epidemiología , Prevalencia , Análisis de Regresión , Estudios Seroepidemiológicos , España/epidemiología , Reino Unido/epidemiología
7.
J Hepatol ; 2017 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-28887164

RESUMEN

Although epidemic jaundice was well known to physicians of antiquity, it is only in recent years that medical science has begun to unravel the origins of hepatitis A virus (HAV) and the unique pathobiology underlying acute hepatitis A in humans. Improvements in sanitation and the successful development of highly efficacious vaccines have markedly reduced the worldwide prevalence and incidence of this enterically-transmitted infection over the past quarter century, yet the virus persists in vulnerable populations and remains a common cause of food-borne disease outbreaks in economically-advantaged societies. Reductions in the prevalence of HAV have led to increases in the median age at which infection occurs, often resulting in more severe disease in affected persons and paradoxical increases in disease burden in some developing nations. Here, we summarize recent advances in the molecular virology of HAV, an atypical member of the Picornaviridae family, survey what is known of the pathogenesis of hepatitis A in humans and the host-pathogen interactions that typify the infection, and review medical and public health aspects of immunisation and disease prevention.

8.
J Hepatol ; 66(1): 48-54, 2017 01.
Artículo en Inglés | MEDLINE | ID: mdl-27592304

RESUMEN

BACKGROUND & AIMS: Information on trends in chronic hepatitis B virus (HBV) prevalence across countries is lacking. We studied changes in chronic HBV infection over previous decades by country, and assessed patterns of change between and within WHO-defined regions. METHODS: Based on data from a published systematic review on chronic HBV, we applied a linear model on the logit scale to assess time trends in country-specific prevalence. Estimated HBsAg prevalence in 2000 and relative changes in prevalence over time were evaluated by country and region. RESULTS: Sufficient data were available for 50 countries, mostly showing reductions in prevalence over time. Various degrees of heterogeneity were observed within regions, with a relatively homogenous pattern in the Eastern Mediterranean region with strong decreases in HBsAg prevalence. Europe showed a mixed pattern: higher and stable chronic HBsAg prevalence in Eastern, and constantly low prevalence in Western Europe. In Africa, some countries demonstrated no change in prevalence; increases were seen in Uganda (odds ratio 1.05 per year; 95% confidence interval 1.04-1.06), Nigeria (1.02; 1.02-1.02), Senegal (1.01; 1.01-1.02), and South Africa (1.02; 1.01-1.02). With some exceptions, country-patterns overlapped among countries of South East Asian and Western Pacific regions, characterized by low-medium HBsAg decreases, most prominent in China and Malaysia. CONCLUSIONS: Most countries experienced decreases in HBsAg prevalence. Dynamics varied, even within regions; decreases occurred mostly before the direct effects of childhood vaccination may have manifested. These findings together with stable and increasing HBsAg prevalence in some countries of Africa and Eastern Europe indicate the need for further tailored country-specific prevention. LAY SUMMARY: This study investigated time trends in prevalence of chronic HBV infection in 50 countries worldwide over the last decade, by estimating relative changes in prevalence. Results show decreases in chronic HBV infection in most countries; no changes or increases in prevalence are noted in some African countries. Reasons for time changes need to be investigated further; based on the results, various prevention measures have contributed to reductions, and further tailored HBV prevention is required to combat the disease on a global level.


Asunto(s)
Salud Global , Virus de la Hepatitis B , Hepatitis B Crónica , Control de Enfermedades Transmisibles/organización & administración , Control de Enfermedades Transmisibles/tendencias , Estudios Transversales/estadística & datos numéricos , Salud Global/estadística & datos numéricos , Salud Global/tendencias , Antígenos de Superficie de la Hepatitis B/análisis , Virus de la Hepatitis B/aislamiento & purificación , Virus de la Hepatitis B/fisiología , Hepatitis B Crónica/epidemiología , Hepatitis B Crónica/prevención & control , Hepatitis B Crónica/virología , Humanos , Prevalencia
10.
BMC Public Health ; 16: 121, 2016 Feb 04.
Artículo en Inglés | MEDLINE | ID: mdl-26846202

RESUMEN

BACKGROUND: Severity and incidence of vaccine-preventable infections with influenza viruses, s. pneumoniae and c. tetani increase with age. Furthermore, vaccine coverage in the elderly is often insufficient. The aim of this study is to identify socio-economic and knowledge-, attitude- and practice- (KAP)-related determinants of vaccination against influenza, pneumococcal disease and tetanus in the older German population. METHODS: We analysed data from a German nationally representative questionnaire-based KAP-survey on infection prevention and hygiene behavior in the elderly (n = 1223). We used logistic regressions to assess impacts of socio-demographic- and KAP-related variables on vaccine uptake in general and on tetanus-, influenza- and pneumococcal vaccination. To generate KAP-scores, we applied factor analyses and analysed scores as predictors of specific vaccinations. RESULTS: A low rated personal health status was associated with a higher uptake of influenza vaccine whereas place of residence within Germany strongly impacted on pneumococcal vaccination. For tetanus and influenza vaccination, the strongest single vaccination predictor was attitude-related, i.e., the perceived importance of the vaccine (OR = 18.1, 95 % CI = 4.5-71.8; OR = 23.0, 95 % CI = 14.9-35.3, respectively). Pneumococcal vaccination was mostly knowledge-associated, i.e., knowing the recommendation predicted uptake (OR = 17.1, 95 % CI = 9.5-30.7). Regarding the generated KAP-scores, the practice-score reflecting vaccine related behavior such as having a vaccination record, was predictive for all vaccines considered. The knowledge-score was associated with influenza (OR = 1.3, 95 % CI = 1.0-1.6) and pneumococcal vaccination (OR = 1.2, 95 % CI = 1.0-1.5). Uniquely for influenza vaccination, the attitude-score was linked to vaccine uptake (OR = 1.1, 95 % CI = 1.0-1.1). CONCLUSIONS: Our results indicate that predictors of vaccination uptake in the elderly strongly depend on vaccine type and that scores of KAP are useful and valid to condense information from numerous individual KAP-variables. While awareness for vaccinations against influenza and tetanus is fairly high already it might have to be increased for vaccinations against pneumocoocal infections.


Asunto(s)
Conocimientos, Actitudes y Práctica en Salud , Vacunas contra la Influenza/administración & dosificación , Toxoide Tetánico/administración & dosificación , Vacunación/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , Estudios Transversales , Análisis Factorial , Femenino , Alemania , Estado de Salud , Humanos , Modelos Logísticos , Masculino , Persona de Mediana Edad , Vacunas Neumococicas/administración & dosificación , Características de la Residencia , Factores Socioeconómicos , Encuestas y Cuestionarios
11.
Lancet ; 386(10003): 1546-55, 2015 Oct 17.
Artículo en Inglés | MEDLINE | ID: mdl-26231459

RESUMEN

BACKGROUND: The quantification of the burden of disease attributable to hepatitis B virus (HBV) infection and the adaptation of prevention and control measures requires knowledge on its prevalence in the general population. For most countries such data are not routinely available. We estimated the national, regional, and global prevalence of chronic HBV infection. METHODS: For this systematic review and pooled analysis, we searched for data on prevalence of chronic HBV infection published between Jan 1, 1965, and Oct 23, 2013, in the databases Medline, Embase, CAB Abstracts (Global health), Popline, and Web of Science. We included studies reporting the hepatitis B surface antigen (HBsAg) serological marker of chronic HBV infection in non-high-risk groups and extracted data into a customised database. For each country, we calculated HBsAg prevalence estimates and 95% CIs weighted by study size. We extrapolated prevalence estimates to population sizes in 2010 to obtain the number of individuals with chronic HBV infection. FINDINGS: Of the 17,029 records screened, 1800 report on the prevalence of HBsAg covering 161 countries were included. HBsAg seroprevalence was 3·61% (95% CI 3·61-3·61) worldwide with highest endemicity in countries of the African region (total 8·83%, 8·82-8·83) and Western Pacific region (total 5·26%, 5·26-5·26). Within WHO regions, prevalence ranged from 0·20% (0·19-0·21; Mexico) to 13·55% (9·00-19·89; Haiti) in the Americas, to 0·48% (0·12-1·90; the Seychelles) to 22·38% (20·10-24·83; South Sudan) in the African region. We estimated that in 2010, globally, about 248 million individuals were HBsAg positive. INTERPRETATION: This first global assessment of country-level population prevalence of chronic HBV infection found a wide variation between countries and highlights the need for continued prevention and control strategies and the collection of reliable epidemiologic data using standardised methodology. FUNDING: World Health Organization.


Asunto(s)
Salud Global/estadística & datos numéricos , Hepatitis B Crónica/epidemiología , Humanos , Prevalencia , Factores de Riesgo
12.
Emerg Infect Dis ; 21(6): 1012-8, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25989020

RESUMEN

Ebola virus disease (EVD) outbreaks have occurred during the past 5 decades, but none has affected European countries like the 2014 epidemic in West Africa. We used an online questionnaire to investigate risk perceptions in Germany during this epidemic peak. Our questionnaire covered risk perceptions, knowledge about transmission routes, media use, reactions to the outbreak, attitudes toward measures to prevent the spread of EVD and vaccination against EVD, and willingness to volunteer for aid missions. Of 974 participants, 29% indicated that they worried about EVD, 4% correctly stated virus transmission routes, and 75% incorrectly rated airborne transmission and transmission by asymptomatic patients as possible. Many indicated that if a patient were flown to Germany for treatment in a nearby hospital, they would adapt preventive behavior. Although most participants were not worried about EVD at the current stage of the epidemic, misperceptions regarding transmission were common and could trigger inappropriate behavior changes.


Asunto(s)
Fiebre Hemorrágica Ebola/psicología , Percepción , Adolescente , Adulto , Anciano , Ebolavirus , Femenino , Alemania/epidemiología , Conocimientos, Actitudes y Práctica en Salud , Fiebre Hemorrágica Ebola/epidemiología , Fiebre Hemorrágica Ebola/prevención & control , Humanos , Internet , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios , Vacunación , Adulto Joven
13.
Prev Med ; 57(5): 634-40, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24012830

RESUMEN

BACKGROUND: Reliable mortality data are sparse for developing countries. Furthermore, risk factor prevalence information is hardly available and thus not taken into consideration when estimating mortality. METHODS: The authors used a validated, statistical model combined with representative smoking prevalence from WHO STEPS surveys to estimate lung cancer mortality for six Sub-Saharan African countries (Benin, Malawi, Mozambique, Niger, Sierra Leone, Swaziland). Results were compared to a reference database (GLOBOCAN). Using different smoking prevalence scenarios, future lung cancer deaths were estimated. RESULTS: The prevalence of current moderate smoking among males ranged from 8.7% to 34.6%. Prevalence was much lower among females. For all countries considered, our mortality estimates were higher than GLOBOCAN estimates that do not consider prevalence: Overall, we estimated 2405 lung cancer deaths for 2008 compared to 531 deaths estimated by GLOBOCAN. Up to 2030, lung cancer deaths are expected to increase in general and by over 100% in Benin and Niger. Even under the assumption of decrease in smoking prevalence, lung cancer mortality will rise. CONCLUSION: On the bases of detailed smoking prevalence information, our findings implicate a higher lung cancer burden in low income countries. The epidemiologic transition in African low-income countries alludes to the need for targeted health prevention efforts.


Asunto(s)
Países en Desarrollo , Neoplasias Pulmonares/mortalidad , Fumar/efectos adversos , Fumar/epidemiología , Adolescente , Adulto , África del Sur del Sahara/epidemiología , Causas de Muerte , Estudios Transversales , Femenino , Encuestas Epidemiológicas , Humanos , Neoplasias Pulmonares/prevención & control , Masculino , Persona de Mediana Edad , Factores de Riesgo , Prevención del Hábito de Fumar , Adulto Joven
14.
Hum Vaccin Immunother ; 9(7): 1500-11, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23732900

RESUMEN

OBJECTIVES: Economic evaluations on influenza vaccination from low resource settings are scarce and have not been evaluated using a systematic approach. Our objective was to conduct a systematic review on the value for money of influenza vaccination in low- and middle-income countries. METHODS: PubMed and EMBASE were searched for economic evaluations published in any language between 1960 and 2011. Main outcome measures were costs per influenza outcome averted, costs per quality-adjusted life years gained or disability-adjusted life years averted, costs per benefit in monetary units or cost-benefit ratios. RESULTS: Nine economic evaluations on seasonal influenza vaccine met the inclusion criteria. These were model- or randomized-controlled-trial (RCT)-based economic evaluations from middle-income countries. Influenza vaccination provided value for money for elderly, infants, adults and children with high-risk conditions. Vaccination was cost-effective and cost-saving for chronic obstructive pulmonary disease patients and in elderly above 65 y from model-based evaluations, but conclusions from RCTs on elderly varied. CONCLUSION: Economic evaluations from middle income regions differed in population studied, outcomes and definitions used. Most findings are in line with evidence from high-income countries highlighting that influenza vaccine is likely to provide value for money. However, serious methodological limitations do not allow drawing conclusions on cost-effectiveness of influenza vaccination in middle income countries. Evidence on cost-effectiveness from low-income countries is lacking altogether, and more information is needed from full economic evaluations that are conducted in a standardized manner.


Asunto(s)
Análisis Costo-Beneficio/economía , Países en Desarrollo/economía , Vacunas contra la Influenza/economía , Gripe Humana/economía , Países Desarrollados/economía , Humanos , Gripe Humana/prevención & control , Evaluación de Resultado en la Atención de Salud/economía , Pandemias/economía , Años de Vida Ajustados por Calidad de Vida , Vacunación/economía
15.
BMC Infect Dis ; 12: 131, 2012 Jun 09.
Artículo en Inglés | MEDLINE | ID: mdl-22682147

RESUMEN

BACKGROUND: HBeAg presence in childbearing-age women is a major determinant of perinatal hepatitis B virus (HBV) transmission. The risk of developing chronic HBV infection and liver disease is highest at young age. Our aim was to assess perinatal HBV transmission risk by means of estimating age- and region-specific HBeAg prevalence. METHODS: Based on observed HBeAg seroprevalence data obtained from a systematic literature review, we modeled HBeAg prevalence using an empirical Bayesian hierarchical model. Age- and region-specific estimates were generated for 1990 and 2005. RESULTS: Globally, highest HBeAg prevalence of over 50 % was found in 0-9 years old girls. At reproductive age, HBeAg prevalence was 20-50 %. Prevalence was highest in young females in East Asia in 1990 (78 %), the infection was less common in Sub-Saharan and North Africa. Regional differences in prevalence were smaller in 2005. There was an overall decrease in HBeAg between 1990 and 2005, which was strongest among girls in Oceania (23.3 % decline), South and South-East Asia (14 % decline). However, in these regions, prevalence remained high at 67 % among young females in 2005. Smaller decreases were observed in women at reproductive age, at which 24-32 % of all HBsAg-positive women were HBeAg-positive in 2005, with lowest prevalence in Southern Sub-Saharan Africa and highest prevalence in Oceania and South-East Asia. CONCLUSIONS: HBeAg estimates are crucial for understanding the epidemiology of HBV and for prioritizing implementation of WHO`s prevention recommendations for all infants to receive the first dose of hepatitis B vaccine within 24 hours of birth. Results will have importance as access to treatment for chronic HBV infection is expanded.


Asunto(s)
Antígenos e de la Hepatitis B/sangre , Hepatitis B/epidemiología , Hepatitis B/transmisión , Transmisión Vertical de Enfermedad Infecciosa , Complicaciones Infecciosas del Embarazo/epidemiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Femenino , Salud Global , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , Embarazo , Estudios Seroepidemiológicos , Adulto Joven
17.
Int J Public Health ; 55(1): 43-8, 2010 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19636512

RESUMEN

OBJECTIVES: The international classification of diseases (ICD) is used to code death worldwide uniformly and comparably. This study investigates the reliability of national ICD-10 coding practice by assessing agreement of two official coding offices in Germany. METHODS: Inter-observer agreement for coding of 372 quasi-randomly selected death certificates is measured by percentages of agreement and simple kappa coefficients. RESULTS: Only 209 (56%) deaths were coded with the same 3-digit ICD-10 code. Agreement of the main chapters according to ICD-10 is higher with 78.2% and a kappa statistic of 0.69 (CI 95%, 0.63-0.75). Examples show that the coding rules correctly applied to the information given on the death certificates may lead to different conclusions. CONCLUSIONS: Data show good agreement in the marginal distribution, and thus population frequencies of causes of death may be more reliable despite limited agreement between the two coding offices.


Asunto(s)
Causas de Muerte , Documentación/normas , Clasificación Internacional de Enfermedades , Reproducibilidad de los Resultados , Certificado de Defunción , Alemania , Humanos , Observación
18.
Cancer Causes Control ; 20(10): 1873-9, 2009 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-19543985

RESUMEN

This study compares cancer mortality and incidence of ethnic German migrants from the Former Soviet Union (FSU) in Germany. Data were obtained from two migrant cohorts residing in the federal state of North Rhine-Westphalia (NRW) (n = 34,393) and Saarland (n = 18,619). Vital status of the NRW cohort was ascertained through local population registries. Causes of death were obtained from the NRW statistical office or from local health offices. Cancer incidence of the Saarland cohort was derived from the Saarland cancer registry using record linkage. From 1990 to 2005, we observed 708 cancer deaths and 586 incident cancer cases. In males, both cancer incidence and cancer mortality were similar to the German population. Female cancer incidence and mortality were lower, the latter significantly. Site-specific standardized mortality and incidence ratios showed great variation in comparison to Germans and were remarkably similar to each other for most sites. Lung cancer was elevated among males, but lower among females. Stomach cancer was higher contrasting with lower ratios for prostate cancer, male colorectal cancer, and female breast cancer. Results confirm that FSU-migrants suffer from cancers, which may be prevented by prevention programs. Furthermore, we cannot conclude a different health-seeking behavior compared to Germans.


Asunto(s)
Neoplasias/epidemiología , Neoplasias/mortalidad , Migrantes/estadística & datos numéricos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Causas de Muerte , Estudios de Cohortes , Femenino , Estudios de Seguimiento , Alemania/epidemiología , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Mortalidad , U.R.S.S./etnología , Adulto Joven
19.
Bull. W.H.O. (Print) ; 87(8): 644-644, 2009-8.
Artículo en Inglés | WHO IRIS | ID: who-270483
20.
BMC Public Health ; 8: 110, 2008 Apr 09.
Artículo en Inglés | MEDLINE | ID: mdl-18400085

RESUMEN

BACKGROUND: Prevalence of infectious diseases in migrant populations has been addressed in numerous studies. However, information is sparse on their mortality due to chronic diseases that are aetiologically associated with an infectious agent. This study investigates mortality related to infectious diseases with a specific focus on cancers of possibly infectious origin in voluntary migrants from the Former Soviet Union residing in Israel and in Germany. METHODS: Both groups of migrants arrived from the Former Soviet Union in their destination countries between 1990 and 2001. Population-based data on migrants in Israel were obtained from the Israel Central Bureau of Statistics. Data for migrants in Germany were obtained from a representative sample of all migrants from the Former Soviet Union in Germany. Cause of death information was available until 2003 for the Israeli cohort and until 2005 for the German cohort. Standardized mortality ratios were calculated relative to the destination country for selected causes of death for which infectious agents may be causally involved. Multivariate Poisson regression was applied to assess differences in mortality by length of residence in the host country. RESULTS: Both in Israel and in Germany these migrants have lower overall mortality than the population in their destination countries. However, they have significantly elevated mortality from viral hepatitis and from stomach and liver cancer when compared to the destination populations. Regression analysis shows that in Israel stomach cancer mortality is significantly higher among migrants at shorter durations of residence when compared to durations of more than nine years. CONCLUSION: Higher mortality from cancers associated with infection and from viral hepatitis among migrants from the Former Soviet Union might result from higher prevalence of infections which were acquired in earlier years of life. The results highlight new challenges posed by diseases of infectious origin in migrants and call attention to the link between communicable and non-communicable diseases.


Asunto(s)
Hepatitis Viral Humana/etnología , Infecciones/etnología , Neoplasias/etnología , Migrantes/estadística & datos numéricos , Enfermedad Crónica , Estudios de Cohortes , Femenino , Alemania/epidemiología , Hepatitis Viral Humana/mortalidad , Humanos , Infecciones/complicaciones , Israel/epidemiología , Masculino , Neoplasias/mortalidad , Vigilancia de la Población , Prevalencia , U.R.S.S./etnología
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