Basic principles of descriptive statistics in medical research
Descriptive statistics provides tools to explore, summarize and illustrate the research data. In this tutorial we discuss two main types of data - qualitative and quantitative variables, and the most common approaches to characterize data distribution numerically and graphically. This article presen...
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| Format: | Article |
| Language: | Russian |
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Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)
2021-12-01
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| Series: | Сеченовский вестник |
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| Online Access: | https://www.sechenovmedj.com/jour/article/view/397 |
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| author | N. M. Bulanov A. Yu. Suvorov O. B. Blyuss D. B. Munblit D. V. Butnaru M. Yu. Nadinskaia A. A. Zaikin |
| author_facet | N. M. Bulanov A. Yu. Suvorov O. B. Blyuss D. B. Munblit D. V. Butnaru M. Yu. Nadinskaia A. A. Zaikin |
| author_sort | N. M. Bulanov |
| collection | DOAJ |
| description | Descriptive statistics provides tools to explore, summarize and illustrate the research data. In this tutorial we discuss two main types of data - qualitative and quantitative variables, and the most common approaches to characterize data distribution numerically and graphically. This article presents two important sets of parameters - measures of the central tendency (mean, median and mode) and variation (standard deviation, quantiles) and suggests the most suitable conditions for their application. We explain the difference between the general population and random samples, that are usually analyzed in studies. The parameters which characterize the sample (for example, measures of the central tendency) are point estimates, that can differ from the respective parameters of the general population. We introduce the concept of confidence interval - the range of values, which likely includes the true value of the parameter for the general population. All concepts and definitions are illustrated with examples, which simulate the research data. |
| format | Article |
| id | doaj-art-4f4deb26660948c7af6d792eec14f224 |
| institution | DOAJ |
| issn | 2218-7332 2658-3348 |
| language | Russian |
| publishDate | 2021-12-01 |
| publisher | Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University) |
| record_format | Article |
| series | Сеченовский вестник |
| spelling | doaj-art-4f4deb26660948c7af6d792eec14f2242025-08-20T02:53:22ZrusFederal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University)Сеченовский вестник2218-73322658-33482021-12-0112341610.47093/2218-7332.2021.12.3.4-16208Basic principles of descriptive statistics in medical researchN. M. Bulanov0A. Yu. Suvorov1O. B. Blyuss2D. B. Munblit3D. V. Butnaru4M. Yu. Nadinskaia5A. A. Zaikin6Sechenov First Moscow State Medical University (Sechenov University)Sechenov First Moscow State Medical University (Sechenov University)Sechenov First Moscow State Medical University (Sechenov University); University of HertfordshireSechenov First Moscow State Medical University (Sechenov University); Imperial College LondonSechenov First Moscow State Medical University (Sechenov University)Sechenov First Moscow State Medical University (Sechenov University)Sechenov First Moscow State Medical University (Sechenov University); University College LondonDescriptive statistics provides tools to explore, summarize and illustrate the research data. In this tutorial we discuss two main types of data - qualitative and quantitative variables, and the most common approaches to characterize data distribution numerically and graphically. This article presents two important sets of parameters - measures of the central tendency (mean, median and mode) and variation (standard deviation, quantiles) and suggests the most suitable conditions for their application. We explain the difference between the general population and random samples, that are usually analyzed in studies. The parameters which characterize the sample (for example, measures of the central tendency) are point estimates, that can differ from the respective parameters of the general population. We introduce the concept of confidence interval - the range of values, which likely includes the true value of the parameter for the general population. All concepts and definitions are illustrated with examples, which simulate the research data.https://www.sechenovmedj.com/jour/article/view/397statistics as topicnormal distributionmeanstandard deviationquantilesconfidence intervalhistogram |
| spellingShingle | N. M. Bulanov A. Yu. Suvorov O. B. Blyuss D. B. Munblit D. V. Butnaru M. Yu. Nadinskaia A. A. Zaikin Basic principles of descriptive statistics in medical research Сеченовский вестник statistics as topic normal distribution mean standard deviation quantiles confidence interval histogram |
| title | Basic principles of descriptive statistics in medical research |
| title_full | Basic principles of descriptive statistics in medical research |
| title_fullStr | Basic principles of descriptive statistics in medical research |
| title_full_unstemmed | Basic principles of descriptive statistics in medical research |
| title_short | Basic principles of descriptive statistics in medical research |
| title_sort | basic principles of descriptive statistics in medical research |
| topic | statistics as topic normal distribution mean standard deviation quantiles confidence interval histogram |
| url | https://www.sechenovmedj.com/jour/article/view/397 |
| work_keys_str_mv | AT nmbulanov basicprinciplesofdescriptivestatisticsinmedicalresearch AT ayusuvorov basicprinciplesofdescriptivestatisticsinmedicalresearch AT obblyuss basicprinciplesofdescriptivestatisticsinmedicalresearch AT dbmunblit basicprinciplesofdescriptivestatisticsinmedicalresearch AT dvbutnaru basicprinciplesofdescriptivestatisticsinmedicalresearch AT myunadinskaia basicprinciplesofdescriptivestatisticsinmedicalresearch AT aazaikin basicprinciplesofdescriptivestatisticsinmedicalresearch |