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- W2287454181 abstract "Objective To explore several numerical methods of ordinal vailable in one.way ordinal contingency table and their interrelationship,and to compare corresponding statistical analysis methods such as Ridit analysis and rank sum test.Methods Formula deduction Was based on five simphfied grading approaches including rank_ri,ridit_ri,ridit-ci,ridit-rmi and table scores.Practical data set Was verified by SAS8.2 in clinical practice(to test the effect of Shiwei solution in treatment for chronic tracheitis).Results Because of the linear relationship of rank_ri=N ridit_ri+1/2=N ridit_rmi=(N+1)ridit_rmi,the exact x2 values in Ridit analysis based on ridit_ri,ridit-rciand ridit_mi were completely the same,and they were equivalent to the Kruskal-Wallis H test.Traditional Ridit analysis Was based on ridit_ri,and its corresponding x2value calculated with an approximate variance(1/12)Was conservative.The exact x2 test of Rdit analysis should be used when comparing multiple groups in the clinical researches because of its special merits such as distribution of mean ridit value on(0,1)and clear graph expression.rnIe exact X2 test of Ridit analysis Can be output directly by proc freq of SAS8.2 with ridit and modridit option(SCORES=). Condusion The exact X2test of Ridit analysis is equivalent to the Kruskal-Wallis H test,and should be used when comparing multiple groups in the clinical researches.Key words: One-way ordinal contingency table; Ridit analysis; Statistics.nonparametric; Evaluation Studies" @default.
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- W2287454181 date "2008-06-01" @default.
- W2287454181 modified "2023-09-24" @default.
- W2287454181 title "[The relationship between Ridit analysis and rank sum test for one-way ordinal contingency table in medical research]." @default.
- W2287454181 doi "https://doi.org/10.3321/j.issn:0253-9624.2008.06.013" @default.
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