![]() Chapter Contents |
![]() Previous |
![]() Next |
The PHREG Procedure |
Let and
denote the
ith component of
and
, respectively.
The hazards ratio (also known as risk ratio)
for the explanatory variable with
regression coefficient
is defined as
.The hazards ratio is estimated by
.
The
confidence limits
for the hazards ratio are calculated as
The hazards ratio is the ratio of the hazards functions that correspond to a change of one unit of the given variable and conditional on fixed values of all other variables.
![]() Chapter Contents |
![]() Previous |
![]() Next |
![]() Top |
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.