Of the federal programs providing healthcare, the largest is medicare, which provides health insurance for citizens aged 65 and older.
<h3>What is Medicare?</h3>
This is the name that is given to one of the greatest health care programs in the United States. Medicare is a social program that was started in the nation by Theodore Roosevelt when he was the president.
It helped to improve the health of the People of the country by granting them insurance on health and other way s of accessing medical and health facilities at a little fee.
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Loss of follow-up is a problem in most cohort studies and often introduces bias. It is a situation in which a researcher loses contact with a subject, resulting in missing data. Too many subjects failing follow-up diminish the internal validity of the study.
<h3>What is follow-up loss in cohort studies? </h3>
- Follow-up loss introduces bias (observed deviation of relevant measures from what would have been observed without bias) if there is a difference in the likelihood of loss due to follow-up related to exposure status and outcome.
- In the clinical research trials industry, loss due to follow-up is defined as patients who were actively participating in a clinical research trial at some point but who lost themselves (due to errors in the computer tracking system or due to unavailability).
- In cohort studies: 1) Imaging outcome, is loss of follow-up. 2) These are essentially prospective studies, so confounding factors are not an issue. 3) These studies help examine multiple outcomes from a single, infrequent exposure. 4) These are usually faster and cheaper than case-control studies.
<h3>What are advantage and disadvantages of cohort studies?</h3>
- In general, the main advantage of cohort studies is the ability to study multiple exposures and multiple endpoints in a single cohort. This recording allows you to select index groups, so you can explore rare recordings.
- A major weakness of cohort studies is that this type of study design can be time consuming and expensive for results that are rare or evolve over long periods of time. It's a question of research.
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Answer:
v = 5 m/s.
Explanation:
Given that,
Mass of a student, m = 55 kg
He traveled 200 m in 40 s
We need to find the student’s average speed. Total distance divided by total time is equal to average speed. It can be written as :
So, the average speed of the student is 5 m/s.
Answer: scientific method
Explanation: Scientific method refers to means of looking into phenomena, acquire new knowledge, correct misconceptions and fallacies, and probe theories. Scientific method is a procedure of investigation with defined steps that include experiments and careful observation. The most important part of scientific method is the testing of hypotheses. A hypothesis is a prescribed explanation for an event, which can be tested. Hypotheses, are generally produced within the context of a scientific theory.
Answer:
Ancient Nubian cultures were sophisticated and cosmopolitan, as the region served as a major trading center for goods from the African interior, Arabian desert, and Mediterranean basin. From sub-Saharan Africa, Nubian communities traded gold, ivory, ebony, and animal pelts.
It was an ideal center for trade because it was along the Nile River and near overland trade routes.
