Re: [R] group sequential analysis - stopping for futility

2008-10-30 Thread Bernardo Rangel Tura
Em Ter, 2008-10-28 às 08:30 -0700, [EMAIL PROTECTED] escreveu: Hello - I am wondering if anyone has written some R code to calculate futility bounds for a group sequential analysis of clinical trials data. The library ldbounds has a function 'bounds' which calculates the effectiveness

[R] group sequential analysis - stopping for futility

2008-10-28 Thread Alice . Pressman
Hello - I am wondering if anyone has written some R code to calculate futility bounds for a group sequential analysis of clinical trials data. The library ldbounds has a function 'bounds' which calculates the effectiveness stopping bounds for various spending functions, but it does not