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romainkp / stremr

Streamlined Estimation for Static, Dynamic and Stochastic Treatment Regimes in Longitudinal Data

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stratifyQ_by_rule

marycombs opened this issue · comments

commented

The documentation in fit_GCOMP() for stratifyQ_by_rule says,

Set to 'TRUE' for stratifying the fit of Q (the outcome model) by rule-followers only.

Does this mean that non-rule-followers are excluded at each time point from the hazard estimate? I don't see separate "stratified" estimates.

Thanks,

commented

Nothing to do with the hazard.

The outcome model is the fit of the expectation E[Y|\bar{L},\bar{A}] (over many time-points).

If the observed \bar{A} is not consistent with following the rule (dynamic or static), the above regression will be only fit among the observations who are actually following the rule.

Claro?

commented

So is this most applicable for a target parameter like a data-adaptive parameter? When you intervene on treatment according to a rule, isn't everyone following that rule at each time point under the intervened treatment? Under what circumstance would you calculated a treatment-specific mean but only over individuals who actually followed that treatment?