st: ST: Hazard rates translating into probabilities

[Michael Kregar <kgm_ch@yahoo.com>]

Dear all,

I have run the following cox proportional regression
and have obtained the following hazard rates:

Cox regression -- Breslow method for ties

No. of subjects =         1183                    
Number of obs   =     38798
No. of failures =           81
Time at risk    =        61604
                                                   LR
chi2(4)      =     20.97
Log likelihood  =    -543.6461                    
Prob > chi2     =    0.0003

------------------------------------------------------------------------------
          _t | Haz. Ratio   Std. Err.      z    P>|z| 
   [95% Conf. Interval]
-------------+----------------------------------------------------------------
qrav_opcfs~d |   .6283569   .0971229    -3.01   0.003 
   .4641295    .8506946
    ingdpann |   .0010561   .0022373    -3.24   0.001 
   .0000166    .0671317
qrav_intli~d |   1.794957   .3403711     3.08   0.002 
   1.237781    2.602941
qrav_ncapi~d |   3.291716   1.722468     2.28   0.023 
   1.180351    9.179809
------------------------------------------------------------------------------


QUESTION:

How can I obtain an overall probability of the above
model when using data from say one observation (for
the four independent variables above). I am looking
for overall probabilities of failure (not hazard
rate). Can anyone give me a one by one calculation?

Many thanks






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