• A longitudinal, population based, birth cohort study. (bmj.com)
  • Participants were drawn from the Medical Research Council's national survey of health and development, a birth cohort study stratified by social class and initially consisting of 5362 people selected from all births that occurred in England, Scotland, and Wales during one week in March 1946. (bmj.com)
  • How many subjects are needed in a longitudinal birth cohort study? (bris.ac.uk)
  • Dive into the research topics of 'How many subjects are needed in a longitudinal birth cohort study? (bris.ac.uk)
  • Orton S, Bowker K, Cooper S, Naughton F, Ussher M, Pickett KE, Leonardi-Bee J, Sutton S, Dhalwani NN & Coleman T (2014) Longitudinal cohort survey of women's smoking behaviour and attitudes in pregnancy: study methods and baseline data. (stir.ac.uk)
  • Objectives: To report the methods used to assemble a contemporary pregnancy cohort for investigating influences on smoking behaviour before, during and after pregnancy and to report characteristics of women recruited. (stir.ac.uk)
  • The current knowledge base has weaknesses both in terms of the low number of studies, the methods used to identify predictors, and whether there have been changes in mortality over time. (biomedcentral.com)
  • Methods: A case-control study of 107 GDM cases and 214 controls (matched 1:2 on age, race/ethnicity, and gestational week of blood draw) was conducted within the prospective NICHD Fetal Growth Studies-Singleton Cohort (2009-2013). (nih.gov)
  • By assessing the combinability of heterogeneous populations prior to combining data using a method that more optimally accounts for underlying cohort differences, we were able to identify significant associations between prenatal PM 2.5 exposure and birthweight that were not detected using standard methods. (mssm.edu)
  • Methods A prospective cohort of adult patients undergoing laparoscopic surgery for suspected appendicitis was performed between July 2014 and December 2014. (regsj.dk)
  • There are mixed findings from systematic reviews of how the pandemic affected CYP's mental health , which may be due to heterogeneous methods and poor quality studies. (bvsalud.org)
  • She introduced methods to improve survey research and longitudinal studies. (wikipedia.org)
  • Her contributions to methods of survey research included procedures for locating respondents in longitudinal studies. (wikipedia.org)
  • METHODS: Pregnant women (n = 6822) were recruited in 2009 and 2010, and their 6853 children created a child cohort that was representative of New Zealand births from 2007-10. (ox.ac.uk)
  • METHODS AND ANALYSIS: Biological samples such as blood, saliva, urine, fat, peritoneal fluid and-if found-endometrial tissue or fibroids as well as detailed clinical and intraoperative data will be collected from women undergoing surgery and participating in the study after informed consent. (ox.ac.uk)
  • This suggests that future analyses using this cohort and aimed at understanding smoking behaviour in pregnancy may produce findings that are broadly generalisable. (stir.ac.uk)
  • The study findings will help fill a significant methodological gap in toddler PA measurement and expand the body of knowledge on the factors influencing early childhood PA development. (biomedcentral.com)
  • Internal living environment and respiratory disease in children: findings from the Growing Up in New Zealand longitudinal child cohort study. (ox.ac.uk)
  • Findings from this study could inform and improve existing public health recommendations on contaminated Great Lakes fish consumption. (cdc.gov)
  • Design Observational longitudinal cohort study. (bmj.com)
  • 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)
  • Participants Participants from the original Echocardiographic Heart of England Screening (ECHOES) study were invited to attend for rescreening. (bmj.com)
  • Results 1618 of 3408 participants underwent screening which represented 47% of survivors and 26% of the original ECHOES cohort. (bmj.com)
  • Sixty-eight out of 1232 (5.5%, 95% CI 4.3% to 6.9%) participants who were recruited from the general population over the age of 45 and did not have heart failure in the original study, had heart failure on rescreening. (bmj.com)
  • Purpose The Swiss Transplant Cohort Study (STCS) is a prospective multicentre cohort study which started to actively enrol study participants in May 2008. (bmj.com)
  • Forty-four study volunteers (67% of the participants) were cluster randomized into two groups for MRI measurements (22 subjects each) according to the project protocol with its different research modules: musculoskeletal system, brain and pain perception, cardiovascular system, body composition, and oxidative stress and inflammation. (biomedcentral.com)
  • The exposed group consisted of study participants hospitalized due to a head injury, the remaining participants were used as controls. (biomedcentral.com)
  • A, Information for the full cohort of 1037 participants. (jamanetwork.com)
  • B, Analysis restricted to 83 participants who received inpatient mental-health services (8% of the cohort). (jamanetwork.com)
  • This is a prospective, interventional, cohort study, meaning that researchers will follow and observe a group of enrolled study participants over a period of time (one to two months) to gather information and record any developments of the outcomes in question. (nih.gov)
  • similar data were subsequently collected in several waves in this cohort, with a final collection between January, 2008, and February, 2009, when participants were aged 24-32 years. (nih.gov)
  • Effects of HIV-1 in these studies may have been obscured by a lack of adjustment for prestudy treatment with antimalarial drugs (which might be more common in HIV-1 patients with recurrent fevers [ 27 ]) and by their inherent dependence on the relative survival of HIV-infected and HIV-uninfected participants, given the increased case fatality of malaria among HIV-infected patients ( 6 ). (cdc.gov)
  • In the Fibroids and Endometriosis Oxford (FENOX) study, we combine the investigation of fibroids and endometriosis, and plan to collect high-quality tissue samples and medical data of participants over a time frame of 5 years after surgical intervention. (ox.ac.uk)
  • Increasing the frequency of outcome measurement can be costly in terms of staff time and resources and can place a substantial burden on study participants in terms of their time commitment and potential for response fatigue [2,3,5]. (ijpds.org)
  • A longer duration also increases study costs because participants will be followed for longer periods. (ijpds.org)
  • Study participants are 18,963 middle-aged women and men who are New York State fishing license holders and who reside in 16 New York counties that border Lakes Ontario and Erie. (cdc.gov)
  • This retrospective study cervical cancer, unless they acquire a new HPV infection. (cdc.gov)
  • In this prospective cohort study, we used data from the National Longitudinal Study of Adolescent to Adult Health, a nationally representative sample of US adolescents from whom data were collected during adolescence (ages 11-18 years) and adulthood (ages 24-32 years). (nih.gov)
  • Protocol for a longitudinal, prospective cohort study investigating the biology of uterine fibroids and endometriosis, and patients' quality of life: the FENOX study. (ox.ac.uk)
  • We leverage data from three longitudinal North American pregnancy cohorts to demonstrate a novel method to assess study heterogeneity and potential combinability of studies for pooled analyses in order to better understand how to consider site in analyses. (mssm.edu)
  • Analyses included mother-child dyads (N = 1966) from the Asthma Coalition on Community Environment and Social Stress (ACCESS) Project and the PRogramming of Intergenerational Stress Mechanisms (PRISM) study in the northeastern United States, and the Programming Research in Obesity, Growth, Environment and Social Stressors (PROGRESS) study in Mexico City. (mssm.edu)
  • Linear regression analyses within each cohort separately did not find significant associations between PM 2.5 averaged over the third trimester and Fenton z-scores. (mssm.edu)
  • The cohort to conduct these analyses was obtained from the Health and Retirement Study (HRS), a biennial nationally representative panel study of U.S. adults. (cdc.gov)
  • The HRS respondents who were working for pay in the year 2004 (n = 7,212) formed the cohort for analyses investigating the associations between physical work requirements and injuries, and the consequences of such injuries. (cdc.gov)
  • This population-based historical cohort study included headache data from two large epidemiological surveys performed with an 11-year interval. (biomedcentral.com)
  • We sought to estimate waiting times to EIP services in a large, representative epidemiological cohort in England, and investigate possible reasons for any variation. (uea.ac.uk)
  • We examined the association between birth weight and cognitive function in the normal population using data from the British 1946 birth cohort. (bmj.com)
  • This E.D. TAB is the first report produced using data from the second round of data collection for the Early Childhood Longitudinal Study, Birth Cohort (ECLS-B), a study of a nationally representative sample of children born in the year 2001. (ed.gov)
  • This study will be one of the first to use longitudinal data to validate a machine learning activity recognition algorithm and apply the algorithm to quantify free-living ambulatory movement in toddlers. (biomedcentral.com)
  • What is data linkage for longitudinal cohort studies? (manchester.ac.uk)
  • Policy makers, professionals and researchers are demonstrating increasing interest in linking administrative data from multiple sources to enhance longitudinal survey. (manchester.ac.uk)
  • This talk will provide an overview of benefits and issues associated with data linkage for longitudinal surveys, emphasising the ones specific to Australian context. (manchester.ac.uk)
  • Focusing on the Longitudinal Study of Australian Children, specific data linkages of education and health data will be discussed in details. (manchester.ac.uk)
  • For this Dutch cohort (N=522), born on average in 1932, register and archive data on offending and family-life events from age 18 to 50 years are investigated. (llcsjournal.org)
  • The primary aim of the current study was to analyze headache data for those who participated in both the second and third waves of the HUNT Study, evaluating the impact on new onset headache or exacerbation of headache due to head injuries in a population with known pre-injury headache status, taking into account the head injury severity. (biomedcentral.com)
  • Beginning at a time when data was stored on punch cards, she developed computer programs and practices for the archiving, analysis and secure sharing of confidential longitudinal data. (wikipedia.org)
  • She designed and implemented specialized computer software to archive longitudinal data, and to store and analyze confidential data with high levels of security. (wikipedia.org)
  • 1 We examined use of the PCHR throughout the UK for recording children's weight and explored its associations with measures of social disadvantage and infant health, using cross sectional data from the millennium cohort study. (bmj.com)
  • We used data from this final wave and from baseline, and our study represents a secondary analysis of these data. (nih.gov)
  • Longitudinal data were collected through face-to-face interviews and linkage to routinely collected national datasets. (ox.ac.uk)
  • These data, which are collected for purposes other than research (i.e. for secondary purposes), typically capture information for entire populations and can be linked at the individual-level to create longitudinal profiles for studying a wide range of health and social issues [1]. (ijpds.org)
  • Population-based cohorts to examine the long-term effects of various events and interventions are regularly created from administrative data. (ijpds.org)
  • Using routinely-collected administrative data for longitudinal cohort studies requires thoughtful attention to various elements of the study design. (ijpds.org)
  • For longitudinal cohort studies that involve primary data collection, previous studies have demonstrated how decisions about these design elements can impact statistical power and the precision of regression coefficient estimates [2-4]. (ijpds.org)
  • When collecting primary data for longitudinal cohort studies, there can be trade-offs between the benefits and costs of increasing study duration and frequency of outcome measurement. (ijpds.org)
  • iv) comparison of two common approaches for analyzing longitudinal data with injuries as an outcome. (cdc.gov)
  • Another challenge is to synthesize data from various study designs, including cross-sectional, case-control, and longitudinal cohort designs. (cdc.gov)
  • The primary aim of the mothers and their children's health (MATCH) cohort study is to evaluate the effect of nutrition, sleep quality, and lifestyle on maternal and neonatal outcomes. (biomedcentral.com)
  • The results of the MATCH cohort study will support the development of contextual interventions that can enhance antenatal, peripartum, and postnatal status, neonatal outcomes, and longevity mother and child. (biomedcentral.com)
  • 214-216 Initially designed to study post-secondary hopes and educational outcomes of the 1957 Wisconsin high school graduating class, the project became one of the most extensive long-term studies to follow subjects throughout their life-course. (wikipedia.org)
  • The current study will expand on existing follow-up to ascertain the occurrence of select fatal and nonfatal health outcomes and to relate these outcomes with reported Great Lakes fish consumption, recent and long-term. (cdc.gov)
  • The aim of this study was to investigate the time from residents' admission to Icelandic nursing homes to death and the predictive power of demographic variables, health status (health stability, pain, depression and cognitive performance) and functional profile (ADL and social engagement) for 3-year mortality in yearly cohorts from 1996-2006. (biomedcentral.com)
  • Study design, time of assessment and the delay in assessment from time of admittance are most likely factors that affect the outcome. (biomedcentral.com)
  • When designing prospective and retrospective longitudinal cohort studies, investigators must make decisions about study duration (i.e. length of follow-up) and frequency of outcome measurement. (ijpds.org)
  • To examine the impact and potential challenges of longitudinal design decisions in retrospective cohort studies and illustrate the effects of varying study duration and frequency of outcome measurement in the retrospective setting using a numeric example. (ijpds.org)
  • In this study, we focus specifically on decisions about the study duration (i.e. length of follow-up) and the frequency of outcome measurement. (ijpds.org)
  • Raudenbush and Liu [2] and Moerbeek [3] observed that the impact of increasing study duration (holding frequency constant) on statistical power was larger than the impact of increasing the frequency of outcome measurement (holding duration constant) by the same multiplicative factor. (ijpds.org)
  • Increasing study duration enables the capture of potential lag-effects [5], while increasing the frequency of outcome measurement allows for detection of nonlinear trends [2,3,5]. (ijpds.org)
  • A particular advantage of this cohort is the use of repeated cognitive assessments throughout life, beginning at age 8 years and extending to age 43, thus allowing the investigation of relative change in cognitive function according to birth weight. (bmj.com)
  • We here present the design and the preliminary baseline characteristics of the Hellenic Longitudinal Investigation of Aging and Diet (HELIAD). (karger.com)
  • Objectives Rescreen a large community cohort to examine the progression to heart failure over time and the role of natriuretic peptide testing in screening. (bmj.com)
  • The Child and Mother Physical Activity Study is a longitudinal study to observe PA development in toddlerhood and examine the influence of personal and parental characteristics on PA development. (biomedcentral.com)
  • The purpose of this study is to examine the density of the lung as measured by chest computed tomography (CT) and determine if existing emphysema predicts changes in the rate of subsequent emphysema or changes in CT, serum or plasma biomarkers of interest. (nih.gov)
  • It has enabled the Hausers and their many students and collaborators to examine a wide array of social and economic factors and study issues like social stratification, mobility, inequality, education, development and aging. (wikipedia.org)
  • The HELIAD is a population-based, multidisciplinary, collaborative study designed to estimate the prevalence and incidence of AD, other dementias, mild cognitive impairment, and other neuropsychiatric conditions of aging in the Greek population and to investigate associations between nutrition and cognitive dysfunction/age-related neuropsychiatric diseases in this Mediterranean population. (karger.com)
  • Limited longitudinal research efforts have specifically focused on the injury experiences, and their consequences among the aging workforce. (cdc.gov)
  • Design: Longitudinal cohort survey. (stir.ac.uk)
  • Second, we wanted to explore selected disease-related risk factors of POAG incidence in an individual-level longitudinal design, as only limited information has been available thus far. (biomedcentral.com)
  • Design Cross sectional survey within a cohort study. (bmj.com)
  • Recommendations about how to select and report time-related design decisions in retrospective cohort studies should be included in reporting guidelines. (ijpds.org)
  • Design, construction, and management of a comprehensive employee research database: the PERDS study of the Harvard Center for Work, Health, and Wellbeing. (cdc.gov)
  • This study will investigate the genes involved in the breathing process and in the development of lung diseases such as asthma or sarcoidosis to improve understanding of the role they play. (nih.gov)
  • The cohort to investigate the association between psychosocial work factors and injuries included 3,305 working adults who responded to the HRS's psychosocial and lifestyle questionnaire in the years 2006 and 2010. (cdc.gov)
  • The Australian Longitudinal Study on Women's Health is managed by staff and investigators at the Priority Research Centre for Gender, Health and Ageing at, The University of Newcastle, and staff and investigators at the University of Queensland. (edu.au)
  • Mothers' daily third trimester exposure to particulate matter ≤ 2.5 μm in diameter (PM 2.5 ) was estimated using a validated satellite-based spatio-temporally resolved model in all studies. (mssm.edu)
  • The cohort included all mothers who experienced the death of an infant between April 1, 1999 and March 31, 2012 and a matched (3:1) group of mothers who did not experience death. (ijpds.org)
  • abstract = "One of the first decisions that needs to be taken when planning a birth cohort concerns the size of the study. (bris.ac.uk)
  • ABSTRACT This study in Egypt investigated the influence of selected maternal factors on neonatal birth size. (who.int)
  • A mailed follow-up health survey is being conducted in a large established and well-characterized cohort of adults enrolled in the New York State Angler Cohort Study (NYSACS). (cdc.gov)
  • This study estimates the prevalence and incidence rates of primary open -angle glaucoma (POAG) as well as risk factors based on a dataset from the largest German health insurance company. (biomedcentral.com)
  • To put our results in the context of earlier studies, a systematic review with the keywords "glaucoma", "prevalence", and "incidence" based on Medline, distinguishing between total prevalence and age-specific prevalence and incidence, was performed. (biomedcentral.com)
  • Since 2007, the Harvard Center for Work, Health, and Wellbeing (a NIOSH TWH Center of Excellence) has worked in partnership with Partners HealthCare, the largest employer in Massachusetts, to establish a research cohort of patient care workers at two of the health system's world-renowned hospitals. (cdc.gov)
  • This open cohort, called PERDS (Partners Employee Research Database & Study) consists of approximately 13,000 workers to date (growing by about 1,000 people per year) and involves an integrated, longitudinal, administrative database linked with periodic surveys of employees. (cdc.gov)
  • The aim of our study was to comprehensively compare consequences between 6 months and 12 months after symptom onset among hospital survivors with COVID-19. (nih.gov)
  • We undertook an ambidirectional cohort study of COVID-19 survivors who had been discharged from Jin Yin-tan Hospital (Wuhan, China) between Jan 7 and May 29, 2020. (nih.gov)
  • The health status in our cohort of COVID-19 survivors at 12 months was still lower than that in the control population. (nih.gov)
  • Although most cognitive studies focus on clinically low birthweight groups, confirmation of this association across the full birthweight range in the normal population is of particular interest, since this would imply that explanatory factors are similarly distributed in the general population. (bmj.com)
  • One early such population based study found that verbal reasoning scores at age 11 increased with increasing birth weight. (bmj.com)
  • In a population-based cohort study, we explored whether subjects hospitalized due to a head injury more often developed a new headache or experienced exacerbation of previously reported headache compared to the surrounding population. (biomedcentral.com)
  • In a previous population-based historical cohort study, which was based on the third wave of the Nord-Trøndelag Health Study (HUNT), we evaluated the relationship between previous head injury and headache phenotype [ 15 ]. (biomedcentral.com)
  • Most, but not all, suggest deterioration in mental health but population level studies may obscure the differing experiences of subgroups. (bvsalud.org)
  • B, Same analysis restricted to the 83 cohort members who received inpatient mental-health services: 74 met criteria for an internalizing disorder, 70 met criteria for an externalizing disorder, and 41 of 83 met criteria for a thought disorder. (jamanetwork.com)
  • Mental health in the COVID-19 pandemic: A longitudinal analysis of the CLoCk cohort study. (bvsalud.org)
  • The follow-up time for survival of each cohort was 36 months from admission. (biomedcentral.com)
  • The median survival time was 31 months, and no significant difference was detected in the mortality rate between cohorts. (biomedcentral.com)
  • The current study aims to more firmly establish the link between organochlorine exposure and endocrine disruption. (cdc.gov)
  • In the millennium cohort study, parents of 18 819 children born between 2000 and 2002 (response rate 72%) were interviewed on a range of topics when their children were 9 months old. (bmj.com)
  • The HUNT Study is a longitudinal cohort study in which all inhabitants ≥20 years of age in Nord-Trøndelag were invited to participate. (biomedcentral.com)
  • The graph is made up of a thin line for each individual in the Dunedin Study stacked together to show the 1037 cohort members, followed from age 11 to age 45 years. (jamanetwork.com)
  • Sankey diagrams show cohort members' shifting diagnoses from 1 assessment phase to the next, from ages 11 to 15 years to age 45 years. (jamanetwork.com)
  • To participate in this study, you or your child must be between 2 and 90 years old. (nih.gov)
  • To participate in this study, you must be between 18 and 75 years old. (nih.gov)
  • 50 years increased with age in the study from Costa Rica (9). (cdc.gov)
  • This New Zealand study investigated current exposures to specific risk factors in the home during the first five years of life and provided updated evidence on the links between the home environment and childhood ARI hospitalisation. (ox.ac.uk)
  • Results: 1101 (33.7%, 95% CI 32.1% to 35.4%) women were eligible for inclusion in the cohort, and of these 850 (77.2%, 95% CI 74.6% to 79.6%) were recruited. (stir.ac.uk)
  • Find studies for diseases and conditions and see if you or a loved one is eligible. (nih.gov)
  • Cooperative Studies Program (CSP) No. 566 is a research project examining possible lasting health effects of the Iraq War. (va.gov)
  • However, prolonged MSUM races offer the best opportunity to study physical adaptation and the associations of the physiological parameters of athletes in a longitudinal setting day by day. (biomedcentral.com)
  • The impact of these decisions have been previously investigated in the prospective setting, but have not been described for retrospective cohort studies. (ijpds.org)
  • The aim of this study was to assess the wide spectrum of adaptive responses in humans regarding the different tissues, organs and functional systems being exposed to such chronic physical endurance load with limited time for regeneration and resulting negative energy balance. (biomedcentral.com)
  • Waiting time variation in Early Intervention Psychosis Services:longitudinal evidence from the SEPEA naturalistic cohort study. (uea.ac.uk)
  • A matched longitudinal cohort study of non-hospitalised test-positive and test-negative 11- to 17-year-old CYP in England were recruited from the UK Health Security Agency having undergone PCR testing for COVID-19. (bvsalud.org)
  • All these studies were conducted in same 3-year interval for women whose baseline smears areas where the risk of cervical cancer is considered to be were HPV positive. (cdc.gov)
  • She was a Senior Scientist Emeritus in the College of Letters and Science/Sociology and the Administrative Director of the Wisconsin Longitudinal Study (WLS) of the Department of Sociology at the University of Wisconsin-Madison, where she worked from 1970 to 2011. (wikipedia.org)