rank correlation


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rank correlation

[′raŋk ‚kä·rə′lā·shən]
(statistics)
A nonparametric test of statistical dependence for a random sample of paired observations.
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Results show a correlation (Spearman's rank correlation coefficient (rs)(2)=0.502, p<0.001) between Abeta1-42/Abeta1-4 ratio in plasma and Abeta1-42/Abeta1-40 ratio in CSF; therefore, it may be possible to understand the pathological processes in the brain condition by measuring Abeta1-42/Abeta1-40 ratio in plasma.
The categorical variables were compared using Chi-squared test, and correlational analyses were performed using Spearman rank correlation analysis.
Spearman Rho test: Spearman's rank correlation coefficient, a product-moment correlation coefficient that measures the linear relationship between two ranked variables.
The correlation of the MDA concentration with TAC and GSH concentrations, besides the correlation of TNF-[alpha] concentration with NO, MPO, ADA, and IL-1[beta] concentrations were analyzed using Pearson's rank correlation coefficient.
We used Spearman's rank correlation coefficient to evaluate the relationship between the proportion of candy or purses with lead-containing pigments and year of purchase.
The correlation between the expression of PD-1 and PD-L1 was analyzed by Spearman rank correlation. Disease-specific survival was analyzed using the log-rank (Mantel-Cox) test.
Spearman rank correlation analysis indicated that there was no correlation between lens opacity and AMD in these patients ( r = −0.028, P = 0.193).
The first measure, Kendal's Rank Correlation [44] is used to calculate the rank correlation between features calculated in this study and values of baseline.
In tables no 1 and 2 are introduced the results of the test events non-parametric correlation with the attendance and the improved freestyle swimming of the female and male students from Dental Medicine Faculty and General Medicine Faculty in "Carol Davila" University of Medicine and Pharmacy of Bucharest--made by means the KyPlot program, using Spearman Rank Correlation.
Moreover, correlations between nutritional hematological examination scores and inflammation biomarker parameters were assessed using Spearman's rank correlation coefficient.
Diet restriction was correlated with ALT levels using chi square test and Spearman rank correlation test.