Hello,
Under weight statement, what kind of weight can be put in ?
Dose the weight only allow IPW(inverse probability of treatment weights) or any kind of weight from the weighting method such as entropy balance, propensity score matching ?
https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_lifetest_syntax08.htm
proc lifetest data=VALung ; time SurvTime*Censor(1); strata Cell; weight ???? ; run;
Thank you!
From the documentation of the Weight statement for Proc Lifetest:
The implementation of weights in PROC LIFETEST is based on Xie and Liu (2005, 2011), who use inverse probability of treatment weights to reduce confounding effects. A weight is assigned to each subject as the inverse probability of being in a certain group. If a subject has a higher probability of being in a group, it is considered as overrepresented and is therefore assigned a lower weight; on the other hand, if the subject has a smaller probability of being in a group, it is considered as underrepresented and is assigned a higher weight.
So it appears that only IPW is expected.
@Ivy wrote:
Hello,
Under weight statement, what kind of weight can be put in ?
Dose the weight only allow IPW(inverse probability of treatment weights) or any kind of weight from the weighting method such as entropy balance, propensity score matching ?
https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_lifetest_syntax08.htm
proc lifetest data=VALung ; time SurvTime*Censor(1); strata Cell; weight ???? ; run;Thank you!
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