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Confidence interval for difference in Harrell's c statistics (or equivalently Somers' D statistics)
2011 May 05
1
Confidence interval for difference in Harrell's c statistics (or equivalently Somers' D statistics)
...t difference between the statistics (between the dev and val datasets.) Any help would be much appreciated. > rdev <- rcorrcens(Surv(stimes1,eind1)~gendat1+neurodat1) > rdev Somers' Rank Correlation for Censored Data Response variable:Surv(stimes1, eind1) C Dxy aDxy SD Z P n gendat1 0.534 0.069 0.069 0.017 3.98 0.0001 1500 neurodat1 0.482 -0.036 0.036 0.011 3.18 0.0015 1500 > rval <- rcorrcens(Surv(stimes2,eind2)~gendat2+neurodat2) > rval Somers' Rank Correlation for Censored Data Response variable:Surv(stimes2, eind2)...
Confidence interval or p-value for difference in two c-statistics
2011 Sep 14
0
Confidence interval or p-value for difference in two c-statistics
...ed two datasets (independent). I can obtain c-statistics for each variable in each dataset using this code: > rdev <- rcorrcens(Surv(stimes1,eind1)~gendat1+neurodat1) > rdev Somers' Rank Correlation for Censored Data Response variable:Surv(stimes1, eind1) C Dxy aDxy SD Z P n gendat1 0.534 0.069 0.069 0.017 3.98 0.0001 1500 neurodat1 0.482 -0.036 0.036 0.011 3.18 0.0015 1500 > rval <- rcorrcens(Surv(stimes2,eind2)~gendat2+neurodat2) > rval Somers' Rank Correlation for Censored Data Response variable:Surv(stimes2, eind2)...