-------------------------------------------------------------------------------------------------
       log:  C:\MyDocs\MPH\Text\SecondEdition\WebDoFiles\8.7.Framingham.log
  log type:  text
 opened on:   3 Jan 2008, 17:33:44

. *  8.7.Framingham.log        
. *
. *  Simple Poisson regression analysis of the effect of gender on
. *  coronary heart disease in the Framingham Heart Study.
. *
. use  C:\WDDtext\8.7.Framingham.dta, clear

. list

     +----------------------+
     | chd   per_yrs   male |
     |----------------------|
  1. | 650     61773      0 |
  2. | 823     42688      1 |
     +----------------------+

. glm chd male , family(poisson) link(log) lnoffset(per_yrs)

Iteration 0:   log likelihood = -8.4353186  
Iteration 1:   log likelihood = -8.4330708  
Iteration 2:   log likelihood = -8.4330708  

Generalized linear models                          No. of obs      =         2
Optimization     : ML                              Residual df     =         0
                                                   Scale parameter =         1
Deviance         =  6.52811e-14                    (1/df) Deviance =         .
Pearson          =  3.23538e-21                    (1/df) Pearson  =         .

Variance function: V(u) = u                        [Poisson]
Link function    : g(u) = ln(u)                    [Log]

                                                   AIC             =  10.43307
Log likelihood   = -8.433070809                    BIC             =  6.53e-14

------------------------------------------------------------------------------
             |                 OIM
         chd |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
        male |   .6055324   .0524741    11.54   0.000     .5026851    .7083797
       _cons |  -4.554249   .0392232  -116.11   0.000    -4.631125   -4.477373
     per_yrs | (exposure)
------------------------------------------------------------------------------

. lincom male,irr

 ( 1)  [chd]male = 0

------------------------------------------------------------------------------
         chd |        IRR   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         (1) |   1.832227   .0961444    11.54   0.000     1.653154    2.030698
------------------------------------------------------------------------------

. log close
       log:  C:\MyDocs\MPH\Text\SecondEdition\WebDoFiles\8.7.Framingham.log
  log type:  text
 closed on:   3 Jan 2008, 17:33:45
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