People think 'old age' starts later than it used to, study finds
Middle-aged and older adults believe that old age begins later in life than their peers did decades ago, according to a study.
Apr 22, 2024
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Middle-aged and older adults believe that old age begins later in life than their peers did decades ago, according to a study.
Apr 22, 2024
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New research in the April 2024 issue of Journal of the National Comprehensive Cancer Network showcases the feasibility of improving early detection and prevention for pancreatic cancer. Global incidences of pancreatic cancer ...
Apr 16, 2024
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People who as teenagers felt pressure to lose weight from family or from the media, females, people who are not heterosexual, and people experiencing socioeconomic disadvantage, are most at risk of 'internalized' weight stigma, ...
Apr 15, 2024
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Consuming sugar-sweetened drinks in the first few years of childhood can be linked to poor diet patterns that increase the risk of obesity in later life, according to a new study by the School of Psychology at Swansea University.
Apr 12, 2024
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What if changes in a person's stress levels could be detected while they sleep using wearable devices? A new study by University of Vermont researchers published in PLOS Digital Health is the first to find changes in perceived ...
Apr 11, 2024
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An international research team led by Professor Ian Wong Chi-kei, Head of the Department of Pharmacology and Pharmacy at LKS Faculty of Medicine of the University of Hong Kong (HKUMed) has just provided valuable evidence ...
Apr 9, 2024
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Waist circumference-to-height ratio (WHtR) is an inexpensive alternative to body mass index (BMI) for predicting fat mass (FM) in pediatric patients, according to a study published online March 5 in Pediatric Research.
Apr 6, 2024
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Family dynamics are critical to mental well-being, and this role became more prominent during the COVID-19 pandemic as families were bound to stay together longer than usual. A recent study from the University of Alabama ...
Apr 5, 2024
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New research being presented at this year's European Congress of Clinical Microbiology and Infectious Diseases (ECCMID 2024) in Barcelona, Spain (27-30 April) finds that pneumonia-causing bacteria are common in the over 60s ...
Apr 3, 2024
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Hospitals accredited by the American College of Surgeons (ACS) National Accreditation Program for Rectal Cancer (NAPRC) demonstrate significantly better outcomes for patients undergoing rectal cancer surgery compared to non-accredited ...
Mar 28, 2024
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A longitudinal study is a correlational research study that involves repeated observations of the same items over long periods of time — often many decades. It is a type of observational study. Longitudinal studies are often used in psychology to study developmental trends across the life span, and in sociology to study life events throughout lifetimes or generations. The reason for this is that unlike cross-sectional studies, longitudinal studies track the same people, and therefore the differences observed in those people are less likely to be the result of cultural differences across generations. Because of this benefit, longitudinal studies make observing changes more accurate and they are applied in various other fields. In medicine, the design is used to uncover predictors of certain diseases. In advertising, the Communicus System, the design is used to identify the changes that advertising has produced in the attitudes and behaviors of those within the target audience who have seen the advertising campaign.
Because longitudinal studies are observational, in the sense that they observe the state of the world without manipulating it, it has been argued that they may have less power to detect causal relationships than do experiments. But because of the repeated observation at the individual level, they have more power than cross-sectional observational studies, by virtue of being able to exclude time-invariant unobserved individual differences, and by virtue of observing the temporal order of events.
Longitudinal studies allow social scientists to distinguish short from long-term phenomena, such as poverty. If the poverty rate is 10% at a point in time, this may mean that 10% of the population are always poor, or that the whole population experiences poverty for 10% of the time. It is not possible to conclude which of these possibilities is the case using one-off cross-sectional studies.
Types of longitudinal studies include cohort studies and panel studies. Cohort studies sample a cohort, defined as a group experiencing some event (typically birth) in a selected time period, and studying them at intervals through time. Panel studies sample a cross-section, and survey it at (usually regular) intervals.
A retrospective study is a longitudinal study that looks back in time. For instance a researcher may look up the medical records of previous years to look for a trend.
This text uses material from Wikipedia, licensed under CC BY-SA