Cohort effects are a particular issue in studies that use cross-sectional (横断面) methods. In cross-sectional studies, researchers collect and compare data from participants in two or more age-related cohorts at a single point in time. Cross-sectional studies are more efficient but more likely ...
We investigated the effects of the year of birth (cohort effect), sex and birth date on the variations observed in birth weight and postnatal growth rate in 209 newborn fawns marked during eight consecutive fawning seasons from a highly productive roe deer population under good nutritional conditi...
Individuals born in a particular year are, on average, exposed to a similar series of influenza viruses from childhood to adulthood. Therefore, cohort effects are evidence that infection history, including the set of all strains seen in the past, and the order in which cohorts of different ages...
Large, linked data sources are needed to monitor their harmful effects. We developed and characterised a retrospective cohort of people dispensed POs. Participants We used a large linked administrative database to create the Opioid Prescribing Evaluation and Research Activities cohort of individuals ...
First, as has been emphasized by a large number of authors, when analyzing data with repeated observations over time, care must be taken to distinguish within-individual and between-individual effects, which for the purpose of this paper are longitudinal and cross-sectional effects (Curran, Bauer...
Analysing the temporal effects of age, period and cohort. Longitudinal trends can be analysed in terms of the effect of age, birth cohort or year of diagnosis. All three temporal effects are thought to be useful b... Holford,R T. - 《Statistical Methods in Medical Research》 被引量: 407...
Columns are assessment ages. Green signifies the absence of a mental disorder. Yellow signifies that an individual met the criteria for a psychiatric diagnosis at a given assessment age; as the yellow deepens into orange and brown, it signifies a greater number of concurrent disorders diagnosed ...
Electronic health record (EHR) datasets are statistically powerful but are subject to ascertainment bias and missingness. Using the Mass General Brigham multi-institutional EHR, we approximated a community-based cohort by sampling patients receiving long
Participants in cohort studies are grouped together based on having a shared characteristic—like being from the same geographic location, having the same occupation, or having a diagnosis of the same medical condition. Each time the researchers check-in with participants in cohort trials, they're ...
scale prospective and retrospective cohort studies. Most MS registries are nationwide population-based quality registers, enabling health authorities to monitor the quality and effects of DMD treatments (Flachenecker et al., 2014). Examples of registry types and their scientific potential are presented...