Description Usage Format Source References Examples
This data collected by Pedersen et al. (2008) was taken from Terpstra et al. (2011). The data are calculated from doppler waveforms corresponding to 66 patients who were scheduled for a percutaneous liver needle biopsy.
1 | data("hvwi")
|
A data frame with 66 observations on the following 2 variables.
Group
Fibrosis groups: A
:cirrhosis, B
:severe, C
:moderate, D
:mild and E
:none
Values
HVWI values for the five fibrosis groups
Terpstra, J. T., Chang, C. H. and Magel, C. M. (2011). On the use of Sperman's correlation coefficient for testing ordered alternatives. Journal of Statistical Computation and Simulation, 81:11, 1381-1392.
Pedersen, J. F., Madsen, L. G., Vibeke, A. L. Hamberg, O., Horn, T., Federspiel, B. and Bytzer, P. (2008). A doppler waveform index to characterize hepatic vein velocity pattern and evaluate hepatic fibrosis. J. Clin. Ultrasound, 36:4, 208-211.
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