On Jul 4, 2009, at 11:36 AM, sdzhangping wrote:
Dear R users:
In my recent works, I compared the cumulative incidences among
three different treatment groups. The cuminc function (cmprsk
package ) yielded a graph (refer to figure 1)
No figure attached. Perhaps it did not conform to the rules in the
Posting Guide and so was scrubbed before distribution?
and a p value (p = 0.0007). I don’t know how to interpret the
meaning of the p value ( one p value and three subgroups) ? Similar
puzzles exist in log-rank test of survival data (figure 2).
What dose the meaning of p value in these conditions?
Hard to tell. No data or output is visible to the list readers.
What packages and functions should I apply?
To do what?
thanks
Ping Zhang
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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