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Open accessJournal Article
Thörn A, Bunne M, Hallberg H 
21 Mar 2001-Läkartidningen
1 Citations
In addition to RCT and other quantitative procedures, qualitative scientific methods could be used to explore complex clinical problems.
Qualitative themes suggest that patients experienced the two treatments differently in terms of characteristics and outcomes. This study highlights the benefits of incorporating qualitative and quantitative data into RCT process evaluations.
They found that researchers prefer to use quantitative rather than qualitative approaches in their studies.
Although the quality of the RCT studies varied greatly, the result of the studies was encouraging, particularly with the recently published studies.
We argue that quantitative RCT research can neither capture the complexity nor tell the full story of a complex community intervention.
In fact, because they draw not only on quantitative (as does meta-analysis) but also qualitative studies their reach may often be broader.
I argue, instead, that qualitative methods and quantitative methods are simply tools, fit for a range of scientific purposes.
However, qualitative research can also be used as a substitute for classical quantitative profiling methods or to powerfully augment quantitative methodology.
Current instructions may be sufficient for straightforward quantitative evaluations that use meta-analysis for summarizing RCT findings.
However, a scatter plot of RCT quality versus year of publication shows improvement in RCT quality over time, suggesting that future studies may continue to improve methods that minimize bias.

Related Questions

What is the difference between qualitative and quantitative research?5 answersQualitative research typically starts with broad, evolving research questions, allowing for iterative refinement throughout the study, unlike quantitative research, which begins with a fixed narrow question. Qualitative methods include interviews, focus groups, and observations, focusing on understanding participants' perspectives and experiences rather than standardized data collection. In contrast, quantitative research involves quantifying data using numerical measurements from the outset. While quantitative analysis deals with numerical representations to depict reality, qualitative analysis aims to comprehend the "why" behind phenomena. The application of qualitative research is influenced by theoretical interests, while quantitative research relies heavily on actual data for its conclusions. Overall, the distinction lies in the approach to data collection, analysis, and the underlying philosophical origins of each research method.
Describe the differences between quantitative and qualitative research?4 answersQuantitative research involves the use of numerical data to systematically study social issues, requiring quantification and measurement of the subject being assessed. On the other hand, qualitative research begins with broad research questions that may be revised iteratively, aiming to explore experiences and perspectives. Qualitative research methods include interviewing, focus groups, and observation, which allow for flexibility and non-standardization in data collection. In contrast, quantitative research focuses on numerical expressions to depict a given reality and aims to comprehend the "what" of a phenomenon. The sample size in qualitative research is generally smaller compared to quantitative research, and data collection continues until saturation is reached. Qualitative research emphasizes the participants' perspectives and experiences, while quantitative research emphasizes the quantifiable characteristics of things.
What are differences Quantitative research and Qualitative research?4 answersQuantitative research and qualitative research have several differences. Quantitative research involves the collection and analysis of numerical data to study social issues, while qualitative research focuses on understanding the quality and nature of phenomena through non-numerical data. Quantitative research aims to answer "what" questions and uses numerical expressions to depict reality, while qualitative research aims to answer "why" questions and investigates how we describe something. In terms of research questions, quantitative research typically starts with a narrow question that remains fixed, while qualitative research begins with broad questions that may be revised iteratively. The methods used in qualitative research include interviewing and observation, which allow for flexibility and a focus on participants' perspectives and experiences. Quantitative research, on the other hand, relies on numerical data and statistical analysis. Overall, qualitative research provides in-depth, rich data that can answer "how" and "why" questions, while quantitative research focuses on numerical data and aims for generalizability.
What are the key differences between quantitative and qualitative research methodologies?4 answersQualitative and quantitative research methodologies have key distinctions. Qualitative research focuses on theory and data from the perspective of epistemology and ontology, using secondary sources of data for analysis. It emphasizes concepts such as case studies, ethnographies, grounded theories, action research, and narrative research to build theories. On the other hand, quantitative research relies on actual data to draw conclusions. It employs experimental and survey research methods to test theories developed through qualitative research. Mixed method research, which combines qualitative and quantitative methods, has gained popularity in recent years. Scholars who prefer quantitative methods have sometimes criticized or ignored qualitative research. In summary, the key differences between qualitative and quantitative research lie in their approaches to theory, data collection, and the use of mixed methods.
What are some of the key differences between qualitative and quantitative research methods?3 answersQualitative and quantitative research methods have key differences. Qualitative research focuses on gathering and analyzing non-numerical data to gain insights into local-level perspectives and test assumptions relevant to decision-making. It is useful for understanding complex and unpredictable economic phenomena and can provide in-depth insights into participants' experiences. On the other hand, quantitative research uses numerical data to measure actions, attitudes, and characteristics, and draw generalizations from a larger population. It employs statistical and mathematical tools to analyze data and identify trends. Quantitative research is more popular due to its strengths and ability to express facts and identify trends. While qualitative research is often considered less precise, it offers unique advantages and can be highly useful in clinical research. Both methods have their own applications and should be differentiated and applied appropriately to achieve better research results.
What are the differences between qualitative and quantitative research methods?5 answersQualitative and quantitative research methods have differences in their origins, cores, and scope of application. Quantitative research focuses on gathering and analyzing quantifiable data to measure actions, views, attitudes, and other characteristics, allowing for generalizations from a larger population. It uses statistical and mathematical tools to express facts and identify trends. On the other hand, qualitative research examines comprehensive experiences and aims to gain insights into 'reality' based on local-level perspectives. It is useful for testing assumptions relevant to decision-making and allows for openness to different research approaches. Qualitative research methods involve collecting artifacts and verbal data through in-depth interviews, participatory observations, surveys, and focus groups. It also includes analyzing documents and archives. These methods provide a deeper understanding of phenomena and experiences that may not be captured by quantitative methods.

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