Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The hazard ratio is interpretable as an odds or a probability under the
  assumption of proportional hazards   Three statistical studies, all published between 2004 and 2008 but without
referring to one another, assert a useful equivalence involving the hazard
ratio, a parameter estimated for time to event data by the frequently used
proportional hazards model. Stated generally, when the assumption of
proportional hazards is justified, the hazard ratio is equivalent to the odds
that a randomly chosen person from the group whose hazard is represented in the
ratio's numerator will experience the event of interest before a randomly
chosen person from the group represented by the ratio's denominator.

0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics