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st: Re: Interpretation of the Coefficients obtained via -stcox-
From
Yuval Arbel <[email protected]>
To
statalist <[email protected]>
Subject
st: Re: Interpretation of the Coefficients obtained via -stcox-
Date
Sat, 8 Sep 2012 23:26:47 -0700
Dear statalisters,
I appreciate very much your answer to this question.
I'm attaching below the estimation results of -stcox-.
Do they imply that if we increase mean_reduct by 1 unit the hazard to
survival increase by 3.83 percent?
. stcox mean_reduct reductcurrent_mean_reduct rent_net8
diff_stdmadadarea permanentincomeestimate82 diff_mortgage
appreciation if nachut==0 & nachutspouse==0 & diff_per>=-5 &
diff_per<=5,nohr
failure _d: fail == 1
analysis time _t: time_index
id: appt
Iteration 0: log likelihood = -56991.691
Iteration 1: log likelihood = -54168.973
Iteration 2: log likelihood = -53930.527
Iteration 3: log likelihood = -53916.083
Iteration 4: log likelihood = -53915.926
Iteration 5: log likelihood = -53915.926
Refining estimates:
Iteration 0: log likelihood = -53915.926
Cox regression -- Breslow method for ties
No. of subjects = 7191 Number of obs = 324499
No. of failures = 7191
Time at risk = 351446
LR chi2(7) = 6151.53
Log likelihood = -53915.926 Prob > chi2 = 0.0000
------------------------------------------------------------------------------
_t | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
mean_reduct | .0382773 .0006943 55.13 0.000 .0369165 .0396382
reductcurr~t | .0282488 .0007893 35.79 0.000 .0267018 .0297958
rent_net8 | .0018389 .0001947 9.45 0.000 .0014573 .0022204
diff_stdma~a | -.5076186 .0579597 -8.76 0.000 -.6212176 -.3940197
permanent~82 | -.0005113 .0000862 -5.93 0.000 -.0006803 -.0003423
diff_mortg~e | -7.715171 1.23864 -6.23 0.000 -10.14286 -5.287481
appreciation | 10.94379 3.632834 3.01 0.003 3.823562 18.06401
------------------------------------------------------------------------------
On Tue, Aug 21, 2012 at 1:14 AM, Yuval Arbel <[email protected]> wrote:
> Dear Statalisters,
>
> According to stata manual the command -stcox- estimates the following model:
>
> h(t) = h0(t) exp( b1x1 +... + bkxk)
>
> where h(t) is the hazard to survival.
>
> Can I infer from this specification that bk in its original form
> (nohr) measures the percent change of the hazard to survive with
> respect to xk?
>
>
> --
> Dr. Yuval Arbel
> School of Business
> Carmel Academic Center
> 4 Shaar Palmer Street,
> Haifa 33031, Israel
> e-mail1: [email protected]
> e-mail2: [email protected]
--
Dr. Yuval Arbel
School of Business
Carmel Academic Center
4 Shaar Palmer Street,
Haifa 33031, Israel
e-mail1: [email protected]
e-mail2: [email protected]
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