Michael,
I thought that MSM estimation just required robust estimation of
standard errors and CIs, not necessarily bootstrap. See the article by
Robins (Epidemiology, 2000, 11: 550-560). In this article, he
addresses Stata in particular, and I took it to mean that the "robust"
or "sandwich" estimater could be used by specifying hte robust option.
HTH, Tim
7. Time-Dependent Treatments
On 12/5/06, Michael McCulloch <[email protected]> wrote:
Jeff Pitlabo very helpfully pointed out that -bootstrap- is not meant for
weighted data.
In my epidemiology dissertation work, I am applying the marginal structural
models approach, inverse probability of treatment weights (IPTW) in a Cox
proportional hazards analysis. The method as I am learning it requires that
I first weight each observation with the IPTW, and then conduct a bootstrap
Cox proportional hazards analysis.
I would appreciate any suggestions or signposts to resources that could
help me learn another way to solve this problem, given that I do not know
the Mata programming language.
Best wishes,
Michael
____________________________________
Michael McCulloch
Pine Street Clinic
Pine Street Foundation
124 Pine Street, San Anselmo, CA 94960-2674
tel 415.407.1357
fax 415.485.1065
email: [email protected]
web: www.pinest.org
www.pinestreetfoundation.org
www.medepi.net/meta
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