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Ordinal scale and statistics in medical research
British Medical Journal (Clinical Research Ed.)
|February 22, 1986
Summary
Many medical papers incorrectly use advanced statistics with ordinal data. This study highlights the misuse of statistical methods assuming more refined scales than ordinal measurements allow, impacting research accuracy.
Area of Science:
- Medical Statistics
- Research Methodology
- Data Analysis
Background:
- Ordinal measurement scales are frequently used in medical research.
- Inappropriate statistical methods can lead to inaccurate conclusions.
Purpose of the Study:
- To assess the appropriate use of statistical methods in medical research papers.
- To identify the prevalence of statistical method misuse with ordinal data.
Main Methods:
- Survey of 175 papers from 12 medical journals published in 1982.
- Analysis of statistical methods applied to ordinal measurement scales.
Main Results:
- At least 70% of papers used statistical methods assuming a more refined scale than ordinal.
- Identified a significant misuse of statistical techniques with ordinal data.
Conclusions:
- Many medical studies employ statistical methods unsuitable for ordinal data.
- Recommends the use of appropriate non-parametric methods for ordinal data analysis.