Epidemiology cohort studies. Medical search. Frequent questions

Your Name ) thought you would like to see this page from the Journal of Epidemiology & Community Health web site. (bmj.com)
American Journal of Epidemiology. (wikipedia.org)
The study was published in The American Journal of Epidemiology . (who.int)
International Journal of Epidemiology. (lu.se)

In incidence-density sampling , the sampling fraction, or chance of selection as a control, is the same for every member of the risk set of eligible cohort subjects at risk at the time of disease incidence or diagnosis of the case, regardless of whether he was previously selected as a control or will be diagnosed as a case in the future. (aacrjournals.org)
a ) Incidence-density sampling without replacement , wherein a cohort member previously selected as a control is not eligible for further selection and ( b ) Pure controls , a design where controls are selected only from those who did not develop disease during follow-up. (aacrjournals.org)
Incidence-density sampling produces sets of controls that are independent random samples and, therefore, perfectly mimic the exposure distributions in the full cohort at the incidence times of the cases ( 4 ). (aacrjournals.org)
Incidence-density sampling without replacement oversamples recent entrants to the cohort, who might be more likely or less likely to be exposed than long-term cohort members. (aacrjournals.org)
After 12 months of follow-up, the age-adjusted incidence rate of MS was 17.7 cases per 100,000 person-years in the Arepanrix cohort and 24.2 per 100,000 in the unvaccinated cohort. (cdc.gov)
Soon after the 2009 influenza A(H1N1) pandemic, a signal of increased incidence of MS was detected in a postlicensure record-linkage study among residents of 3 counties in Sweden who received Pandemrix (GlaxoSmithKline, Dresden, Germany), an inactivated monovalent AS03-adjuvanted influenza A(H1N1)pdm09 vaccine ( 7 ). (cdc.gov)
The objective of this study is to assess the incidence of diving mishaps and unsafe conditions, and their associations with the participants' routine use of their own checklists. (biomedcentral.com)
The incidence of all self-reported diving-related injuries was 3.1 per 1000 dives in a study of Divers Alert Network (DAN) members from the United States (Ranapurwala, Bird, Vaithiyanathan, & Denoble, 2014 ). (biomedcentral.com)
In one study, the incidence of three mishaps, viz. (biomedcentral.com)
This study aimed to assess the incidence of pulmonary embolism and associated factors among confirmed Covid-19 Patients in Ethi- opia. (who.int)
PANDORA characterizes the relationship between age-specific prevalence of HR-HPV infection and incidence of cervical cancer in female birth cohorts as a function of the time lag between the assessment of HR-HPV prevalence and cancer incidence. (who.int)

Data and computing code: For access to data, please contact the Department of Clinical Epidemiology at Aarhus University Hospital. (lww.com)

Global burden of 87 risk factors in 204 countries and territories, 1990-2019: a systematic analysis for the Global Burden of Disease Study 2019. (ucl.ac.uk)
A 45% drop in diarrhea cases was observed in the service des urgences de l·h pital p diatrique de pediatric emergency department between the study periods in Kalembe-Lembe, entre les 1er janvier et 31 juillet 2019 and 2020. (bvsalud.org)
The majority of patients were entre la période du confinement de la pandémie admitted with moderate dehydration in 2019 than in 2020 (p en 2020 et la période équivalente en 2019. (bvsalud.org)
Public health interventions are needed to majorité des patients ont été admis avec une promote an ambulatory healthcare system during future déshydratation modérée en 2019 qu'en 2020 (p crises. (bvsalud.org)

2 In Sweden, HPV vaccines were introduced in late 2006, and starting from May 2007, HPV vaccination was subsidised for girls aged 13-17 years (birth cohorts 1989-1993). (nature.com)
In 2012, a free-of-charge catch-up HPV vaccination programme for girls aged 13-18 years (birth cohorts 1993-1998), and a school-based HPV vaccination programme for girls aged 10-12 years (birth cohorts 1999 onwards) was launched. (nature.com)

By use of house-to-house and hospital surveillance methods, cohort participants were monitored for evidence of bartonellosis. (edu.pe)
Methods A population-based longitudinal cohort study from 1994 to 2010 was performed in The Health Improvement Network (THIN), a primary care medical record database in the UK. (bmj.com)
This course provides an introduction to the design and analysis of clinical trials, epidemiological studies, and methods for the analysis of biostatistical data. (edu.au)
Methods- This retrospective cross-sectional study was based on data retrieved from the Canadian Institute for Health Information for all patients diagnosed with subarachnoid hemorrhage in Canada. (researchgate.net)
Methods We followed 20 806 newly licensed adolescent and young adult drivers in the DRIVE prospective cohort for 13 years to examine whether self-harm was a risk factor for vehicle crashes. (bmj.com)
MATERIALS AND METHODS: We ascertained prior history of wrist fracture since age 50, measured calcaneal and hip BMD, and performed lateral spine films in a cohort of 9704 elderly community-dwelling women, and then followed them prospectively for incident vertebral and hip fractures. (healthpartners.com)
Methods: A nested case control study was conducted among 131 patients with COVID-19 (40 COVID-19 patients with Pulmonary embolism and 91 COVID-19 patients with no PE) who were on follow up from May, 2021 to May, 2022. (who.int)
Cependant, on en sait peu concernant cet impact Methods . (bvsalud.org)

Association of aortic stiffness with cognitive decline: Whitehall II longitudinal cohort study. (ucl.ac.uk)

The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Initiative developed recommendations on what should be included in an accurate and complete report of an observational study. (nih.gov)
We hope that the STROBE Statement will contribute to improving the quality of reporting of observational studies. (nih.gov)
Statins have been associated with a significantly lower risk of breast (8), colorectal (9), and lymph cancers (10-12) in several observational studies (10,13). (cdc.gov)
Most previous observational studies have been limited by a small number of cases, short follow-up period, unverified self-reports on use and consistency of statins therapy, and no assessment of statins efficacy. (cdc.gov)

Accumulation of the person time in the cohort was estimated through vital status follow-up of a subcohort of 5,000 men and women who were randomly selected after baseline exposure measurement. (aacrjournals.org)
In full cohort studies and in efficient, unbiased designs, the estimate of the hazard ratio for the exposure of interest is based on the weighted differences between the exposure of each case and the weighted average of the exposures in the corresponding risk sets. (aacrjournals.org)
On the other hand, the exposure distribution of controls in the risk sets chosen in designs that lead to bias does not reflect the exposure distribution of the risk set in the full cohort. (aacrjournals.org)
We evaluated the performance of two general population JEM (CONSTANCES and O*NET) to detect known exposure-disease relationships in an American prospective cohort study. (cdc.gov)
To coincide with the Joint Annual Meeting of the International Society of Exposure Science and the International Society for Environmental Epidemiology ( ISES-ISEE 2018 ), Environmental Health has published this collection to highlight top accessed articles in line with the conference theme: Addressing complex local and global issues in environmental exposure and epidemiology - Selected articles for ISES-ISEE 2018. (biomedcentral.com)
Here, in a prospective cohort study (the BREATHE study), the researchers assess whether exposure of children aged 7-10 years to traffic-related air pollutants in schools in Barcelona, Spain, is associated with impaired cognitive development. (plos.org)
Cancer risk from occupational exposure to wood dust : a pooled analysis of epidemiological studies / P. A. Demers and P. Boffetta. (who.int)
Previous exposure-dependent factors related to protection against malaria in a Brazilian Amazon migrant population : an open cohort study / Elisabeth Carmen Duarte. (who.int)

This large prospective cohort study was stratified by race and ethnicity. (medscape.com)
UNLABELLED: In this large prospective cohort study of elderly women, the relationships between prior wrist fracture and incident hip and radiographic vertebral fractures were significantly attenuated when adjusted for BMD. (healthpartners.com)

A detailed Explanation and Elaboration document is published separately and is freely available at http://www.annals.org and on the Web sites of PLoS Medicine and Epidemiology. (nih.gov)

Epidemiological evaluations of HIV disease progression : the tricontinental seroconverter study / Paul Veugelers. (who.int)

Hicks BC, Clement M. Syphilis: Epidemiology, pathophysiology, and clinical manifestations in HIV-uninfected patients. (crossref.org)

Background and Purpose- The purpose of this study was to assess recent trends in the admission and mortality rates for subarachnoid hemorrhage in Canada. (researchgate.net)

Investigators planning studies within cohorts have many options for choosing an efficient sampling design for genome-wide association and other molecular epidemiology studies. (aacrjournals.org)
Nonetheless, choosing the sampling design for a particular molecular epidemiology study is always challenging, and investigators choose among sampling schemes for reasons that are not always obvious or explained. (aacrjournals.org)
Clonal replacement appears to be a common phenomenon, and continuous surveillance is crucial to identify changes in the molecular epidemiology of MRSA. (puce.edu.ec)

Using a case-cohort approach, Cox proportional hazard analysis was used to estimate sex- and cancer site specific hazard ratios (RR) and 95% confidence intervals (CI) for cancer risk according to quintiles of energy adjusted glycemic load. (aacrjournals.org)

We analyzed population-based cohorts assembled by linking Manitoba Health's vaccine registry with hospital, physician, and prescription claim databases, all part of a comprehensive repository of administrative and clinical databases housed at the Manitoba Centre for Health Policy ( 12 ). (cdc.gov)
Epidemiology of Lupus: Longitudinal Studies in Population-Based Cohorts , also known as the CDC-RFA-DP22-002 external icon , is a Notice of Funding Opportunity (NOFO) for 5-year (2022-2027) cooperative agreements to be supported by the Centers for Disease Control and Prevention (CDC). (cdc.gov)
Component A will consist of 5-year follow-up longitudinal studies of lupus in population-based cohorts of adults with lupus. (cdc.gov)
Epidemiology of Lupus: Longitudinal Studies in Population-Based Cohorts , also known as the CDC-RFA-DP19-003, is a closed NOFO for a 3-year cooperative agreement. (cdc.gov)
The study population consisted of a longitudinal nationwide cohort of all residents of Denmark who received a PTSD diagnosis between 1995 and 2011, and an age- and sex-matched general population comparison cohort. (lww.com)
Previous studies have examined the relationship between work organization factors and the WLQ, however these studies have mostly been conducted among injured work ers within the general population, and have not accounted for industry specific factors. (cdc.gov)
Design Population based cohort study. (bmj.com)
A population-based, prospective cohort investigation was conducted in a Peruvian community with endemic bartonellosis. (edu.pe)
The study population was 202,648 enrollees aged 21 or older who purchased at least 1 pack of statin medication from 1998 to 2006. (cdc.gov)
[ 18 ] A haplotype study of Argentinean patients with variegate porphyria suggested a founder mutation within its population as well. (medscape.com)
Study Design, Population and Sample size requires hospitalization and oxygen support, and 5% require admission to an intensive care unit [5-8]. (who.int)
Parallel with these studies, I have become increasingly interested in the economic impacts of population ageing, and potential policy answers to the challenges caused by an ageing population. (lu.se)
the first cohort study in a Kurdish population. (lu.se)

Glycemic load of the diet and colorectal cancer risk, results from the Netherlands Cohort Study. (aacrjournals.org)
We evaluated whether an elevated glycemic load of the diet is associated with the risk of colorectal cancer in the Netherlands Cohort Study on Diet and Cancer (NLCS). (aacrjournals.org)
Plasma cotinine levels and pancreatic cancer in the EPIC cohort study. (ox.ac.uk)
This study on pancreatic cancer, nested within the European Prospective Investigation into Cancer and Nutrition (EPIC cohort), included 146 cases and 146 matched controls. (ox.ac.uk)
This study is the first to show that plasma cotinine levels are strongly related to pancreatic cancer. (ox.ac.uk)
This study assessed the association of hospital volume with colostomy rates and survival for patients with rectal cancer in a large representative cohort identified from the California Cancer Registry. (nih.gov)
The objective of this study was to investigate the association between persistent statin use and the risk of primary cancer in adults. (cdc.gov)
Our study demonstrated that persistent use of statins is associated with a lower overall cancer risk and particularly the risk of incident hematopoietic malignancies. (cdc.gov)
The objective of this study was to investigate the association between persistent use of statins and the risk of overall and site-specific cancer in adults, to assess dose-response relationship, and to examine the effects of varying types of statins. (cdc.gov)

Using the Surveillance , Epidemiology , and End Results (SEER) database, 6486 eligible cases with TC and 309,304 with invasive ductal carcinoma (IDC) were collected. (bvsalud.org)

Evaluation of the efficacy of chemotherapy for tubular carcinoma of the breast: A Surveillance, Epidemiology, and End Results cohort study. (bvsalud.org)

In our study, we aimed to characterize the prevalence. (biomedcentral.com)

Neither study was designed to assess an association with MS, and neither used validated algorithms for identifying MS from administrative databases. (cdc.gov)
In this study, we sought to assess the epidemiology of GC, its clinicopathological profiles, and its association with risk factors as well as to identify premalignant gastric lesions (PGL) and examine neoplastic progression. (mdpi.com)

The health professionals follow up study began in 1986 when 51 529 health professionals aged 40 to 75 years completed a 131 item food frequency questionnaire and provided information about medical history, risk factors for heart disease, and dietary changes during the past 10 years. (bmj.com)
In response to the urgent need to clarify the relationship among multidomain lifestyles, chronic diseases, and dementia, this study investigated the independent associations of multidomain lifestyles and chronic diseases with dementia and examined whether these factors interact with each other creating greater risks of dementia in older adults. (frontiersin.org)
Where the data on infection among cirrhotics is scanty, this study aimed to determine the frequency, microbiological spectrum and various risk factors of infections in cirrhosis of liver. (scirp.org)

Consideration of person-year and proportional hazards analyses of full cohorts may add further insight into ramifications of different designs. (aacrjournals.org)

abstract = "Bartonella bacilliformis has caused debilitating illness since pre-Incan times, but relatively little is known about its epidemiology. (edu.pe)

Epidemiology, complications, and cost of hospitalization in children with laboratory-confirmed influenza infection. (cdc.gov)

Empirical evidence from genome-wide association studies can supplement intuition and simulations in comparing properties of various case-control designs within cohorts. (aacrjournals.org)

A recent study from the United States found that antiepileptic drug use during pregnancy is increasing, especially for the newer drugs. (bmj.com)
This is a prospective pregnancy cohort study of mothers who use private wells for household water in New Hampshire designed to evaluate maternal/child health impacts of arsenic and other contaminants. (nih.gov)
1 , 2 Some studies suggest that infections such as chlamydia and gonorrhoea diagnosed during pregnancy may predispose women to serious adverse obstetric outcomes such as spontaneous preterm birth (SPTB), low birth weight and stillbirth but other studies have not found such associations. (bmj.com)
8 As most studies have limited their analyses to infections diagnosed during pregnancy rather than prior to conception, in this report we sought to investigate the associations between a prior diagnosis of chlamydia or gonorrhoea, the timing of the diagnosis in relation to the pregnancy, and the likelihood of serious obstetric outcomes (SPTB, small for gestational age (SGA) and stillbirth) in a large cohort of women having their first birth. (bmj.com)

Association of trajectories of depressive symptoms with vascular risk, cognitive function and adverse brain outcomes: The Whitehall II MRI sub-study. (ucl.ac.uk)

2001) Bacterial Infection in Patients with Advanced Cirrhosis: A Multicentre Prospective Study. (scirp.org)

[ 1 , 25 , 26 ] Therefore, our main objective in this Swedish cohort study was to determine whether fruit and vegetable intake or total antioxidant intake modifies the previously observed relationship between milk consumption and death. (medscape.com)

a report from the recruitment phase of Tehran cohort study. (harvard.edu)
This observational study aimed to compare quit rates of different formulations of nicotine replacement among clients referred to a smoking cessation clinic in Tehran, Islamic Republic of Iran. (who.int)

Is the Subject Area "Epidemiology" applicable to this article? (plos.org)

How ambient temperature affects mood: an ecological momentary assessment study in Switzerland. (harvard.edu)
In this study, we follow up with the US Army soldiers who took part in the Neurocognition Deployment Health Study (NDHS), also called "Prospective Assessment of Neurocognition in Future Gulf-deployed and Gulf-nondeployed Military Personnel: A Pilot Study. (va.gov)
Potential participants can choose to complete the in-person assessment at one of the two study sites (Seattle or Boston), or in a private setting in their community (e.g., a hotel conference room). (va.gov)
The major strength of the study is based on the availability of information in the entire Danish Patient Register from 1996 to 2014, which allows historical prospective assessment of the risk of new occurrences of cardiovascular and cerebrovascular diseases (CVDs) during long-term, essentially complete follow-up in patients after colectomy by comparison with matched patients that had undergone other types of surgery. (bmj.com)

Cohort study Alzheimer's disease dementia Rondeau, V. (wikipedia.org)
Potential impact of diabetes prevention on mortality and future burden of dementia and disability: a modelling study. (ucl.ac.uk)

This retrospective study was conducted by using the computerized data sets of a large health maintenance organization (HMO) in Israel. (cdc.gov)
A retrospective study was conducted on diarrhea sur le fardeau des maladies diarrhéiques chez les cases admitted into the emergency department of the enfants en Afrique subsaharienne. (bvsalud.org)

We used information from food frequency questionnaires completed by 61,420 women in a Swedish cohort (22,391 deaths from the 1987-1990 baseline onward), 36,714 women from a second survey (1997) of this cohort, and 45,280 Swedish men (15,478 deaths from the 1998 baseline onward). (medscape.com)

We defined the scope of the recommendations to cover 3 main study designs: cohort, case-control, and cross-sectional studies. (nih.gov)

Eighteen items are common to all 3 study designs and 4 are specific for cohort, case-control, or cross-sectional studies. (nih.gov)
In 2012, VEC members received over $25 million in research grants and contracts including cohort, case-control, and intervention studies. (vumc.org)

Cohort study of 1 million Swedish men. (bvsalud.org)

Another study from Stockholm, Sweden, reported increased risk for paraesthesias, but not of MS, among persons vaccinated with Pandemrix ( 8 ). (cdc.gov)
11 12 We therefore examined the association between dietary fat and cholesterol and risk of myocardial infarction in a large cohort of men in the United States. (bmj.com)
The association between low concentrations of magnesium in drinking water and risk of CVD has been studied for several decades, with diverging evidence. (biomedcentral.com)
Objectives The hypothesis of the study was that if the gut microbiota is involved in the development of atherosclerotic cardiovascular and cerebrovascular diseases (CVDs), total colectomy may reduce the long-term risk of CVDs. (bmj.com)
Obesity, smoking, and risk of vasomotor menopausal symptoms: a pooled analysis of eight cohort studies. (ucl.ac.uk)

The Lanxi Cohort study on obesity and obesity-related non-communicable diseases in China. (lu.se)

Between August 1992 and December 1998 we conducted a seven-wave cohort study of adolescent health in Victoria, Australia. (cambridge.org)

The relationship between organizational policies and practices with work limitations within a cohort of hospital patient care work ers. (cdc.gov)
This is a prospective cohort study conducted at a tertiary care hospital. (scirp.org)

The data were drawn from the Hubei Memory and Aging Cohort Study. (frontiersin.org)
The data supporting the findings of this study are not publicly available. (bmj.com)
The Care Trajectories-Enriched Data ( TorSaDE ) cohort (Int J Epidemiol. (lu.se)

The Vanderbilt Epidemiology Center is committed to conducting research to enhance and expand our understanding of the distributions and determinants of disease, to promoting collaboration aimed at the translation of research into cost-effective strategies of disease prevention and health care delivery, and to training independent investigators in epidemiology research and disease prevention. (vumc.org)

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20194

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