Multiple primaries in pancreatic cancer patients: indicator of a genetic predisposition?

abstract：:In 1983 and 1984, surveys were conducted in four Chinese population samples, urban and rural for both Beijing and Guangzhou, as part of PRC-USA collaborative research in cardiovascular and cardiopulmonary epidemiology. Serum total cholesterol (TC), HDL-cholesterol (HDL-C), and triglycerides (TG) were measured in 4280 ...

journal_title：International journal of epidemiology

authors： Tao S,Li Y,Xiao Z,Cen R,Zhang H,Zhuo Y,Zhou B,Chen P,Li Y,Liao Y

更新日期：1992-10-01 00:00:00

abstract：:The terminology describing missingness mechanisms is confusing. In particular the meaning of 'missing at random' is often misunderstood, leading researchers faced with missing data problems away from multiple imputation, a method with considerable advantages. The purpose of this article is to clarify how 'missing at r...

journal_title：International journal of epidemiology

authors： Bhaskaran K,Smeeth L

更新日期：2014-08-01 00:00:00

abstract：OBJECTIVES:During the past decades a widening of the relative gap in death rates between upper and lower socioeconomic groups has been reported for several European countries. Although differential mortality decline for cardiovascular diseases has been suggested as an important contributory factor, it is not known what...

journal_title：International journal of epidemiology

authors： Mackenbach JP,Bos V,Andersen O,Cardano M,Costa G,Harding S,Reid A,Hemström O,Valkonen T,Kunst AE

更新日期：2003-10-01 00:00:00

abstract：BACKGOUND:The term 'joint modelling' is used in the statistical literature to refer to methods for simultaneously analysing longitudinal measurement outcomes, also called repeated measurement data, and time-to-event outcomes, also called survival data. A typical example from nephrology is a study in which the data from...

journal_title：International journal of epidemiology

authors： Asar Ö,Ritchie J,Kalra PA,Diggle PJ

更新日期：2015-02-01 00:00:00

abstract：BACKGROUND:Birthweight distributions among second-born infants depend on the birthweights of older siblings, with implications for weight-specific perinatal mortality. We wanted to study whether these relations were explained by socioeconomic levels, and to study time trends in a situation with decreasing perinatal mor...

journal_title：International journal of epidemiology

authors： Melve KK,Skjaerven R

更新日期：2003-08-01 00:00:00

abstract：BACKGROUND:Breast cancer is the most frequent cancer in women and the incidence has increased over time. Our objectives were to study: (1) the socioeconomic differences in breast cancer incidence and mortality in Denmark, (2) how different socioeconomic groups have contributed to the increasing incidence, (3) whether t...

journal_title：International journal of epidemiology

authors： Danø H,Andersen O,Ewertz M,Petersen JH,Lynge E

更新日期：2003-04-01 00:00:00

abstract：:At the request of the COMAC EPID committee of the Commission of the European Communities the author visited all the countries of the EEC except Luxembourg in 1983-84 in order to prepare a report on 'Upgrading in epidemiology'. The report was presented at a meeting organized by COMAC EPID in April 1984 and subsequently...

journal_title：International journal of epidemiology

authors： Pemberton J

更新日期：1986-12-01 00:00:00

abstract：:The Themba Lethu Clinical Cohort was established in 2004 to allow large patient-level analyses from a single HIV treatment site to evaluate National Treatment Guidelines, answer questions of national and international policy relevance and to combine an economic and epidemiologic focus on HIV research. The current obje...

journal_title：International journal of epidemiology

authors： Fox MP,Maskew M,MacPhail AP,Long L,Brennan AT,Westreich D,MacLeod WB,Majuba P,Sanne IM

更新日期：2013-04-01 00:00:00

abstract：BACKGROUND:There is considerable interest in estimating the causal effect of a range of maternal environmental exposures on offspring health-related outcomes. Previous attempts to do this using Mendelian randomization methodologies have been hampered by the paucity of epidemiological cohorts with large numbers of genot...

journal_title：International journal of epidemiology

authors： Evans DM,Moen GH,Hwang LD,Lawlor DA,Warrington NM

更新日期：2019-06-01 00:00:00

abstract：:Trachoma was considered to have been 'eradicated' from the state of São Paulo, Brazil, until 1982 when a number of new cases of trachoma were reported in preschool children in Bebedouro, a small town in northwestern São Paulo. A household survey was undertaken to assess the prevalence and epidemiological characteristi...

journal_title：International journal of epidemiology

authors： Luna EJ,Medina NH,Oliveira MB,de Barros OM,Vranjac A,Melles HH,West S,Taylor HR

更新日期：1992-02-01 00:00:00

abstract：BACKGROUND:So far, no randomized controlled trials with a mean mammographic screening interval of > or = 2 years has demonstrated statistically significant mortality reduction for women younger than age 50. The issue of screening frequency is vital in detection of primary breast cancer. METHODS:The study group consist...

journal_title：International journal of epidemiology

authors： Ren JJ,Peer PG

更新日期：2000-10-01 00:00:00

abstract：:Involvement of adult Ixodes persulcatus ticks in the transmission of Lyme disease in Hailin County, Heilongjiang Province, China, is reported. In 1986 from April through August adult I. persulcatus was the dominant tick in this endemic area with an infection rate of 43% for the Lyme disease spirochaete, Borrelia burgd...

journal_title：International journal of epidemiology

authors： Ai CX,Hu RJ,Hyland KE,Wen YX,Zhang YG,Qiu QC,Li DY,Liu XD,Shi ZX,Zhao JH

更新日期：1990-12-01 00:00:00

abstract：:The role of the major identified risk factors for breast cancer was assessed using data from a hospital-based case-control study conducted in Northern Italy on 1108 women with histologically confirmed breast cancer and 1281 control subjects with a spectrum of acute conditions unrelated to any of the established or pot...

journal_title：International journal of epidemiology

authors： La Vecchia C,Decarli A,Parazzini F,Gentile A,Negri E,Cecchetti G,Franceschi S

更新日期：1987-09-01 00:00:00

abstract：:This study investigates whether consumption of fish during pregnancy may prolong gestation or increase fetal growth. From 1984 to 1987, 11,980 pregnant Danish women filled out a questionnaire while they were in the 36th week of gestation; this was 83% of all such women living in two geographically defined areas. The w...

journal_title：International journal of epidemiology

authors： Olsen SF,Olsen J,Frische G

更新日期：1990-12-01 00:00:00

abstract：BACKGROUND:Contact sports have high rates of injury. Protective equipment regulations are widely used as an intervention to reduce injury risk. The purpose of this study was to investigate the injury prevention effect of regulations governing protective equipment in two full-body contact sports. METHODS:Injury rates i...

journal_title：International journal of epidemiology

authors： Marshall SW,Waller AE,Dick RW,Pugh CB,Loomis DP,Chalmers DJ

更新日期：2002-06-01 00:00:00

abstract：:The ratio of test statistics has been used to compare the efficiency of matched and unmatched designs, and stratified and pooled analyses for case-control studies. The index has been computed for a wide range of population conditions and it is concluded that (a) pooled analysis is always more efficient than stratified...

journal_title：International journal of epidemiology

authors： Choi BC,Howe GR

更新日期：1984-06-01 00:00:00

abstract：:It is usually necessary to estimate repeatability of a self-administered questionnaire from responses by subjects on just two occasions. It is shown that it is not possible to estimate false positive and false negative classification rates separately, but that an average correct classification can be calculated. This ...

journal_title：International journal of epidemiology

authors： Chinn S,Burney PG

更新日期：1987-03-01 00:00:00

abstract：BACKGROUND:Child mortality estimates in Beirut are presented for the late 1970s and the mid 1980s, and changes in socio-religious differentials of mortality across time are investigated. METHODS:Baseline information was obtained from maternity registries in Beirut in 1984 and 1991. Age of mother, number of children ev...

journal_title：International journal of epidemiology

authors： Deeb M,Khlat M,Courbage Y

更新日期：1997-02-01 00:00:00

abstract：:A case-control study has been performed for occupational risk factors of acute leukaemia, based on 185 cases more than 30 years old and 513 matched controls. There was a significant excess of polyvalent farming and electronic engineers among professions of cases, and, in addition of metal workers when considering the ...

journal_title：International journal of epidemiology

authors： Richardson S,Zittoun R,Bastuji-Garin S,Lasserre V,Guihenneuc C,Cadiou M,Viguie F,Laffont-Faust I

更新日期：1992-12-01 00:00:00

abstract：BACKGROUND:Violence among adolescents may have serious developmental, physical, and mental health consequences for the affected individuals. In this study, we assessed the prevalence of violent behaviour and its correlates among 15-16 year old schoolchildren in Iceland. METHODS:In 1997, a cross-sectional survey was co...

journal_title：International journal of epidemiology

authors： Gudlaugsdottir GR,Vilhjalmsson R,Kristjansdottir G,Jacobsen R,Meyrowitsch D

更新日期：2004-10-01 00:00:00

abstract：OBJECTIVE:To observe recent trends in human immunodeficiency virus (HIV) prevalence in antenatal clinic attendees to determine if previously noted falls in HIV prevalence are occurring on both sides of the Kenyan-Ugandan border. Design An ecologic study was conducted at the district level comparing HIV prevalence rates...

journal_title：International journal of epidemiology

authors： Moore DM,Hogg RS

更新日期：2004-06-01 00:00:00

abstract：BACKGROUND:In July 2004 a strain-specific vaccine was introduced to combat an epidemic of group B meningococcal disease in New Zealand. We estimated the effectiveness of this vaccine in pre-school-aged children. METHODS:We conducted a cohort analysis of all children in New Zealand who were aged 6 months to <5 years at...

journal_title：International journal of epidemiology

authors： Galloway Y,Stehr-Green P,McNicholas A,O'Hallahan J

更新日期：2009-04-01 00:00:00

abstract：BACKGROUND:Not every leprosy patient is equally effective in transmitting Mycobacterium leprae. We studied the spatial distribution of infection (using seropositivity as a marker) in the population to identify which disease characteristics of leprosy patients are important in transmission. METHODS:Clinical data and bl...

journal_title：International journal of epidemiology

authors： Bakker MI,Hatta M,Kwenang A,Faber WR,van Beers SM,Klatser PR,Oskam L

更新日期：2004-12-01 00:00:00

abstract：BACKGROUND:In a pilot study for the European Prospective Investigation into Cancer and Nutrition (EPIC) a modification of the Baecke questionnaire on physical activity was tested for repeatability and relative validity in a population of 134 men and women aged 20-70 years. METHODS:For the assessment of repeatability P...

journal_title：International journal of epidemiology

authors： Pols MA,Peeters PH,Bueno-De-Mesquita HB,Ocké MC,Wentink CA,Kemper HC,Collette HJ

更新日期：1995-04-01 00:00:00

abstract：BACKGROUND:We reported in a recent study that parity was inversely related to the incidence of Hodgkin's disease (HD) in Norwegian women younger than 56. In this study, another data set was used to estimate the parity effects on incidence at higher ages, and two different data sets were used to assess how parity influe...

journal_title：International journal of epidemiology

authors： Kravdal O,Hansen S

更新日期：1996-08-01 00:00:00

abstract：BACKGROUND:Many European countries have in recent decades reported growing socioeconomic differentials in mortality. While these trends have usually paralleled high unemployment and increasing income disparities, Sweden had low unemployment and narrowing income differences. This study describes trends, 1961-1990, in to...

journal_title：International journal of epidemiology

authors： Diderichsen F,Hallqvist J

更新日期：1997-08-01 00:00:00

abstract：:Specificity of association between putative risk factor and disease under study is important to inference on causality. Nevertheless many studies investigate mortality of a single disease without comparison with a control. Age-standardized proportional mortality ratios make single disease studies into case-control stu...

journal_title：International journal of epidemiology

authors： West RR

更新日期：1991-12-01 00:00:00

abstract：BACKGROUND:Mobile phone use and exposure to radiofrequency electromagnetic fields (RF-EMF) from it have been associated with symptoms in some studies, but the studies have shortcomings and their findings are inconsistent. We conducted a prospective cohort study to assess the association between amount of mobile phone u...

journal_title：International journal of epidemiology

authors： Auvinen A,Feychting M,Ahlbom A,Hillert L,Elliott P,Schüz J,Kromhout H,Toledano MB,Johansen C,Poulsen AH,Vermeulen R,Heinävaara S,Kojo K,Tettamanti G,COSMOS Study Group.

更新日期：2019-10-01 00:00:00

abstract：:We describe our experience in several settings, following a suggestion in 1983 to add questions on the smoking status of the deceased on the UK death certificate as an effective way to monitor the evolution of the smoking epidemic. In South Africa in 1997 and in Tianjin Municipality, China, in 2010, questions about th...

journal_title：International journal of epidemiology

authors： Sitas F,Bradshaw D,Egger S,Jiang G,Peto R

更新日期：2019-04-01 00:00:00

abstract：BACKGROUND AND OBJECTIVE:Live vaccines may have beneficial non-specific effects. We tested whether the live measles, mumps and rubella (MMR) vaccine compared with the non-live diphtheria-tetanus-acellular-pertussis-inactivated-polio-Haemophilus influenzae type b (DTaP-IPV-Hib) vaccine as the most recent vaccine was ass...

journal_title：International journal of epidemiology

authors： Rieckmann A,Hærskjold A,Benn CS,Aaby P,Lange T,Sørup S

更新日期：2019-12-01 00:00:00