Programming the statistical procedures from SAS

Difference between weight and freq statement in proc phreg

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Difference between weight and freq statement in proc phreg

Hi everyone,

I'm trying to perform the weighted Logrank test using proc phreg.

I found the chi-square statistic estimated by using the weight statement differs from that estimated by using the freq statement with notruncate option, but I'm not really sure why it is.

Where does this difference come from? If I use a integer value as a weight value and as a freq value, the results will be the same?

I'd really appreciate if someone would tell me how differently the weight statement works compared with the freq statement with the notruncate option in proc phreg.


Thanks in advance.

Yasu

Message was edited by: Yasu
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