Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimating populational-average hazard ratios in the presence of
  unmeasured confounding   The Cox regression model and its associated hazard ratio (HR) are frequently
used for summarizing the effect of treatments on time to event outcomes.
However, the HR's interpretation strongly depends on the assumed underlying
survival model. The challenge of interpreting the HR has been the focus of a
number of recent works. Besides, several alternative measures have been
proposed in order to deal with these concerns. The marginal Cox regression
models include an identifiable hazard ratio without individual but populational
causal interpretation. In this work, we study the properties of one particular
marginal Cox regression model and consider its estimation in the presence of
omitted confounder. We prove the large sample consistency of an estimation
score which allows non-binary treatments. Our Monte Carlo simulations suggest
that finite sample behavior of the procedure is adequate. The studied estimator
is more robust than its competitors for weak instruments although it is
slightly more biased for large effects of the treatment. The practical use of
the presented techniques is illustrated through a real practical example using
data from the vascular quality initiative registry. The used R code is provided
as Supplementary Material.

29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio