-------------------------------------------------------------------------------------------------
       log:  C:\MyDocs\MPH\Text\SecondEdition\WebDoFiles\5.32.3.Sepsis.log
  log type:  text
 opened on:  30 Dec 2007, 21:01:38

. *  5.32.3.Sepsis.log
. *
. *  Regress fate against race and oxygen delivery in black and 
. *  white patients from the Ibuprofen in Sepsis Study (Bernard et al. 1997).
. *
. use C:\WDDtext\1.4.11.Sepsis.dta ,clear

. keep if race <2
(32 observations deleted)

. logistic fate race o2del

Logistic regression                               Number of obs   =        161
                                                  LR chi2(2)      =       7.56
                                                  Prob > chi2     =     0.0228
Log likelihood = -105.19119                       Pseudo R2       =     0.0347

------------------------------------------------------------------------------
        fate | Odds Ratio   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
        race |   1.384358   .5933089     0.76   0.448     .5976407    3.206689
       o2del |   .9988218   .0004675    -2.52   0.012     .9979059    .9997385
------------------------------------------------------------------------------

. *
. *  Let o2mis indicate whether o2del is missing.  Set o2del1 = o2del when
. *  oxygen delivery is available and = 0 when it is not.
. *
. generate o2mis = missing(o2del)

. generate o2del1 = o2del
(262 missing values generated)

. replace o2del1 =  0 if o2mis
(262 real changes made)

. logistic fate race o2del1 o2mis

Logistic regression                               Number of obs   =        423
                                                  LR chi2(3)      =      14.87
                                                  Prob > chi2     =     0.0019
Log likelihood = -276.33062                       Pseudo R2       =     0.0262

------------------------------------------------------------------------------
        fate | Odds Ratio   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
        race |   1.847489   .4110734     2.76   0.006     1.194501    2.857443
      o2del1 |   .9987949   .0004711    -2.56   0.011     .9978721    .9997186
       o2mis |   .2364569   .1205078    -2.83   0.005     .0870855    .6420338
------------------------------------------------------------------------------

. log close
       log:  C:\MyDocs\MPH\Text\SecondEdition\WebDoFiles\5.32.3.Sepsis.log
  log type:  text
 closed on:  30 Dec 2007, 21:01:38
-----------------------------------------------------------------------------------------------