NUR 2058 Assignment Researching for Evidence

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NUR 2058 Assignment Researching for Evidence

NUR 2058 Assignment Researching for Evidence

For this written assignment, select one recent (within the past two years) evidence-based article from a peer reviewed nursing journal that describes a “best practice” in an area of nursing you are interested in. For example, if you would like to be a pediatric nurse, select an article that discusses a best practice in pediatric care.

Cite the article and provide a brief overview of how the results or findings were obtained. Then describe the “best practice.” Conclude your discussion by explaining whether you thought the research findings supported the conclusions and the best practice.

This assignment must be no more than 3 pages long. It should include all of the required elements. Use APA Editorial format and attach a copy of the article.

In a broad sense, research evidence can be any systematic observation in order to establish facts and reach conclusions. Anything not fulfilling this definition is typically classified as “expert opinion”, the basis of which includes experience with patients, an understanding of biology, knowledge of preclinical research, as well as of the results of studies. Using expert opinion as the only basis to make decisions has proved problematic because in practice doctors often introduce new treatments too quickly before they have been shown to work, or they are too slow to introduce proven treatments.

However, clinical experience is key to interpret and apply research evidence into practice, and to formulate recommendations, for instance in the context of clinical guidelines. In other words, research evidence is necessary but not sufficient to make good health decisions.

What studies are more reliable?

Not all evidence is equally reliable.

Any study design, qualitative or quantitative, where data is collected from individuals or groups of people is usually called a primary study. There are many types of primary study designs, but for each type of health question there is one that provides more reliable information.

For treatment decisions, there is consensus that the most reliable primary study is the randomised controlled trial (RCT). In this type of study, patients are randomly assigned to have either the treatment being tested or a comparison treatment (sometimes called the control treatment). Random really means random. The decision to put someone into one group or another is made like tossing a coin: heads they go into one group, tails they go into the other.

The control treatment might be a different type of treatment or a dummy treatment that shouldn’t have any effect (a placebo). Researchers then compare the effects of the different treatments.

Large randomised trials are expensive and take time. In addition sometimes it may be unethical to undertake a study in which some people were randomly assigned not to have a treatment. For example, it wouldn’t be right to give oxygen to some children having an asthma attack and not give it to others. In cases like this, other primary study designs may be the best choice.

Laboratory studies are another type of study. Newspapers often have stories of studies showing how a drug cured cancer in mice. But just because a treatment works for animals in laboratory experiments, this doesn’t mean it will work for humans. In fact, most drugs that have been shown to cure cancer in mice do not work for people.

Very rarely we cannot base our health decisions on the results of studies. Sometimes the research hasn’t been done because doctors are used to treating a condition in a way that seems to work. This is often true of treatments for broken bones and operations. But just because there’s no research for a treatment doesn’t mean it doesn’t work. It just means that no one can say for sure.

Why we shouldn’t read studies

An enormous amount of effort is required to be able to identify and summarise everything we know with regard to any given health intervention. The amount of data has soared dramatically. A conservative estimation is there are more than 35,000 medical journals and almost 20 million research articles published every year. On the other hand, up to half of existing data might be unpublished.

How can anyone keep up with all this? And how can you tell if the research is good or not? Each primary study is only one piece of a jigsaw that may take years to finish. Rarely does any one piece of research answer either a doctor’s, or a patient’s questions.

Even though reading large numbers of studies is impractical, high-quality primary studies, especially RCTs constitute the foundations of what we know, and they are the best way of advancing the knowledge. Any effort to support or promote the conduct of sound, transparent and independent trials, that are fully and clearly published is worth endorsing. A prominent project on this regard is the All trials initiative.

Why we should read systematic reviews

Most of the time a single study doesn’t tell us enough. The best answers are found by combining the results of many studies.

A systematic review is a type of research that looks at the results from all of the good-quality studies. It puts together the results of these individual studies into one summary. This gives an estimate of a treatment’s risks and benefits. Sometimes these reviews include a statistical analysis, called a meta-analysis, which combines the results of several studies to give a treatment effect.

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Systematic reviews are increasingly being used for decision-making because they reduce the probability of being misled by looking at one piece of the jigsaw. By being systematic they are also more transparent, and have become the gold standard approach to synthesise the ever-expanding and conflicting biomedical literature.

Systematic reviews are not foolproof. Their findings are only as good as the studies that they include and the methods they employ. But the best reviews clearly state whether the studies they include are good quality or not.

NUR 2058 Assignment Researching for Evidence

NUR 2058 Assignment Researching for Evidence

Three reasons why we shouldn’t read (most) systematic reviews

Firstly, systematic reviews have proliferated over time. From 11 per day in 2010 [1], they skyrocketed up to 40 per day or more in 2015. [2] Some have described this production as having reached epidemic proportions where the large majority of produced systematic reviews and meta-analyses are unnecessary, misleading, and/or conflicted. [3][4] So, finding more than one systematic review for a question is the rule more than the exception, and it is not unusual to find several dozen for the hottest questions.

Second, most systematic reviews address a narrow question. It is difficult to put them in the context of all of the available alternatives for an individual case. Reading multiple reviews to assess all of the alternatives is impractical, even more if we consider they are typically difficult to read for the average clinician, who will need to solve several questions each day. [5]

Third, systematic reviews do not tell what to do, or what is advisable for a given patient or situation. Indeed, good systematic reviews explicitly avoid making recommendations.

So, even though systematic reviews play a key role in any evidence-based decision-making process, most of them are low-quality or outdated, and they rarely provide all the information needed to make decisions in the real-world.

How to find the best available evidence?

Considering the massive amount of information available, we can quickly discard periodically reviewing our favorite journals as a means of sourcing the best available evidence.

The traditional approach to search for evidence has been using major databases, such as PubMed, or EMBASE. These constitute comprehensive sources including millions of relevant, but also irrelevant articles. Even though in the past they were the preferred approach to searching for evidence, information overload has made them impractical, and most clinicians would fail to find the best available evidence in this way, however hard they tried.

Another popular approach is simply searching in Google. Unfortunately, because of its lack of transparency, Google is not a reliable way to filter current best evidence from unsubstantiated or non-scientifically supervised sources. [6]

Three alternatives to access the best evidence?

Alternative 1 – Pick the best systematic review
Mastering the art of identifying, appraising and applying high-quality systematic reviews into practice can be very rewarding. It is not easy, but once mastered it gives a view of the bigger picture: of what is known, and what is not known.

The best single-source of highest-quality systematic reviews is produced by an international organisation called the Cochrane Collaboration, named after a well-known researcher.[4] They can be accessed at The Cochrane Library.

Unfortunately, Cochrane reviews do not cover all of the existing questions, or they are not always up to date. Also, there might be non-Cochrane reviews out-performing Cochrane reviews.

There are many resources that facilitate access to systematic reviews (and other resources), such as Trip databasePubMed HealthACCESSSS or Epistemonikos (the Cochrane Collaboration maintains a comprehensive list of these resources).

Epistemonikos database is innovative both in simultaneously searching multiple resources and in indexing and interlinking relevant evidence. For example, Epistemonikos connects systematic reviews and their included studies, and thus allows clustering of systematic reviews based on the primary studies they have in common. Epistemonikos is also unique in offering an appreciable multilingual user interface, multilingual search, and translation of abstracts in more than 9 languages.[6] This database includes several tools to compare systematic reviews, including the matrix of evidence, a dynamic table showing all of the systematic reviews and the primary studies included in those reviews.

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