Understanding a Scientific Article
A brief description of the key points you will find in the paper. This can include:
Objectives: What questions the researchers hope to answer.
Methods: What type of study the researchers used to conduct the study.
Results: What the researchers discovered.
Discussion/conclusion: What the results mean and/or the author’s interpretation of the results.
Look at the date of the study.
Was it conducted in the past year? 5 years? 15 years? As new information is learned, scientific standards and techniques change, and practices evolve.
New research may support results from older studies as well as lead to new methods to diagnose and treat conditions and diseases.
New research can, at times, also contradict other research, which may require additional research to explore and resolve these differences.
Research can separate the good results from the bad results. In this way, the scientific method is self-correcting, which is reassuring.
Looking at the date can provide insight into how the study fits into the larger evidence base on a particular topic.
Detailed information on the type of research or approach used, the study’s design, the participants, the measurements or outcomes recorded, and steps taken to avoid bias.
Basic research: Scientists ask questions about theories or concepts, and test hypotheses to improve scientific knowledge. It’s the first step in any research.
Translational research: Researchers build on the observations and results of basic research to develop and test new ways to prevent, detect, or treat conditions and diseases.
Clinical trials: Well-planned clinical trials are done with people and may vary in size and type. Clinical trials give the clearest information about whether a treatment or a lifestyle change is effective and safe in humans. However, because they are complicated, lengthy, involve many research participants and can be very expensive, they are usually done only after smaller preliminary studies have been completed.
Systematic reviews and meta-analyses: When researchers review each other’s research to check for quality and look for converging evidence among studies, they may write systematic reviews and meta-analyses. These look at different studies on the same topic. When many studies come to the same conclusion, it helps us know that the results are reliable and valid.
While all research studies are important and contribute to our knowledge base, clinical trials are the types of studies you probably hear about most often in the news. They can have the most immediate impact on improving health and treating disease.
The data, summaries, and analyses of the study are presented in this section. Tables, graphs, and charts that show the results are often included.
To better understand the results, you can ask these questions:
How do these results compare with previous studies?
A single study rarely provides a final, definitive answer.
Repeating a study using the same methods with different volunteers and investigators helps us know that the results are reliable and valid.
What do “statistically significant” and “clinically significant” mean?
Statistically significant means the differences observed between the groups are real and not likely due to chance.
Clinically significant is a measure of the size of the effects observed in the study, which shows the impact of the treatment.
A study can find statistically significant differences between two treatment groups, but the differences may be so small that they are not clinically significant in terms of usefulness for patients.
Are there potential conflicts of interest?
Did the study sponsor or the investigators have any financial or reputational "stake" in the outcome?
Most medical journal articles include information about relevant financial relationships.
This is where you can often find out how the study relates to your own health.
This section includes the authors’ explanation of, and own opinions about, what the results mean.
Since the conclusions are the authors’ own, others may or may not completely agree with their explanation of the results.
Previously published articles the authors used to review what related research was done before, to help design the study and interpret its results.
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