1. Changing hemodialysis thresholds for optimal survival
Lynda Anne Szczech, Edmund G. Lowrie, Zhensheng Li, Nancy L. Lew, J. Michael Lazarus, William F. Owen 
Kidney International 
Volume 59, Issue 2, Pages (February 2001)
DOI: /j x
Copyright © 2001 International Society of Nephrology Terms and Conditions

2. Figure 1
Risk curves for urea reduction ratio (URR) and odds ratio of mortality. The logarithm of odds ratio for mortality is plotted against URR stratified by year.
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

3. Figure 2
Strength of association between URR and mortality. The Ø;2 statistic for each candidate URR threshold in the logistic regression model of mortality is plotted against the candidate URR threshold stratified by year.
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

4. Figure 3
Temporal trends for the prevalent median URR (x-axis) plotted against URR threshold (y-axis) values.
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions