Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accounting for interactions and complex inter-subject dependency in
  estimating treatment effect in cluster randomized trials with missing
  outcomes   Semi-parametric methods are often used for the estimation of intervention
effects on correlated outcomes in cluster-randomized trials (CRTs). When
outcomes are missing at random (MAR), Inverse Probability Weighted (IPW)
methods incorporating baseline covariates can be used to deal with informative
missingness. Also, augmented generalized estimating equations (AUG) correct for
imbalance in baseline covariates but need to be extended for MAR outcomes.
However, in the presence of interactions between treatment and baseline
covariates, neither method alone produces consistent estimates for the marginal
treatment effect if the model for interaction is not correctly specified. We
propose an AUG-IPW estimator that weights by the inverse of the probability of
being a complete case and allows different outcome models in each intervention
arm. This estimator is doubly robust (DR), it gives correct estimates whether
the missing data process or the outcome model is correctly specified. We
consider the problem of covariate interference which arises when the outcome of
an individual may depend on covariates of other individuals. When interfering
covariates are not modeled, the DR property prevents bias as long as covariate
interference is not present simultaneously for the outcome and the missingness.
An R package is developed implementing the proposed method. An extensive
simulation study and an application to a CRT of HIV risk reduction-intervention
in South Africa illustrate the method.

7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph