نتایج جستجو برای: longitudinal cohort
تعداد نتایج: 330870 فیلتر نتایج به سال:
Background. Attrition is a major cause of potential bias in longitudinal studies and clinical trials. Attrition rate above 20% raises concern of the reliability of the results. Few studies have looked at the factors behind attrition in follow-ups spanning decades. Methods. We analyzed attrition and associated factors of a 30-year follow-up cohort of subjects who were born with perinatal risks f...
In developed nations, approximately half of household environments contain pets. Studies of Human-Animal Interaction (HAI) have proposed that there are health benefits and risks associated with pet ownership. However, accurately demonstrating and understanding these relationships first requires a better knowledge of factors associated with ownership of different pet types. A UK birth cohort, th...
Progress has recently been made in understanding the genetic basis of schizophrenia and other psychiatric disorders. Longitudinal studies are complicated by participant dropout, which could be related to the presence of psychiatric problems and associated genetic risk. We tested whether common genetic variants implicated in schizophrenia were associated with study nonparticipation among 7,867 c...
OBJECTIVE Non-compliance with food record submission can induce bias in nutritional epidemiological analysis and make it difficult to draw inference from study findings. We examined the impact of demographic, lifestyle and psychosocial factors on such non-compliance during the first 3 years of participation in a multidisciplinary prospective paediatric study. DESIGN The Environmental Determin...
BACKGROUND In 2012, we set out to recruit a cohort of at least 10,000 women aged 18-23 from across Australia. With recent research demonstrating the inadequacy of traditional approaches to recruiting women in this age group, we elected to conduct open recruiting. OBJECTIVE Our aim was to report on the overall success of open recruiting and to evaluate the relative success of a variety of recr...
هدف: این مطالعه به مقایسه میزان اثربخشی دو روش متداول درمان بیماری all دوران کودکی در مرکز طبی کودکان انجام شده است. روش مطالعه: این مطالعه به صورت یک بررسی مشاهده ای (observational) از نوع طولی (longitudinal) و به صورت کوهورت گذشته نگر (historical cohort) انجام شده است. حجم نمونه مورد بررسی شامل 246 کودکی بود که طی سالهای 1370 تا 1386 در مرکز طبی کودکان با تشخیص all بستری شده و تحت درمان قرار...
OBJECTIVE No previous studies have evaluated the association between dyslipidemia, alcohol drinking, and diabetes in an Inner Mongolian population. We aimed to evaluate the co-effects of drinking and dyslipidemia on diabetes incidence in this population. METHODS The present study was based on 1880 participants from a population-based prospective cohort study among Inner Mongolians living in C...
PURPOSES Typically, early (pre-diagnostic) development in individuals later diagnosed with Rett syndrome (RTT) has been investigated retrospectively using parent reports, medical records and analysis of home videos. In recent years, prospective research designs have been increasingly applied to the investigation of early development in individuals with late phenotypical onset disorders, for exa...
OBJECTIVES Cohort studies must collect data from their participants as economically as possible, while maintaining response rates. This randomized controlled trial investigated whether offering a choice of online or paper questionnaires resulted in improved response rates compared with offering online first. STUDY DESIGN AND SETTING Eligible participants were young people in the Avon Longitud...
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