[R] why the survival function estimate using package 'mstate' & package 'cmprsk' vary from sas and LTA (From WHO).

From: chaijian <erendao_at_hotmail.com>
Date: Tue, 22 Mar 2011 04:13:25 +0000

hello,everyone:
  I am now confused in multistate survival , when I want to poccess a multistate survival analysis, I turn to R and the package 'mstate' and packege 'cmprsk'. When I come to publishing the article. Follow requirement of the magzine, the statistic is carry out in LTA package (which was said to be a authority in intauterine from WHO) . There we found difference in the results(incidence ratio or survival function) computed by the two software. I also come to the result from SAS, carry out survival analysis for each cause seperately using prod-limit method,. the result is closed to LTA rather than R. why ? is the result from R better than LTA or carry out survival analysis for each cause seperately using prod-limit method? thanks a lot!
sincerecely
chai jian
from population and family-planing institute of Henan Province, china                                                

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