1          OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 55         
 56         /********************** birdlung.sas **************************/
 57         title 'Logistic Regression on Bird Lung Data';
 58         
 59         proc format;
 60              value ynfmt 0 = "No"  1 = "Yes";
 NOTE: Format YNFMT is already on the library WORK.FORMATS.
 NOTE: Format YNFMT has been output.
 61              value sexfmt 0 = "Male"  1 = "Female";
 NOTE: Format SEXFMT is already on the library WORK.FORMATS.
 NOTE: Format SEXFMT has been output.
 62              value sesfmt 0 = "Low"  1 = "High";
 NOTE: Format SESFMT is already on the library WORK.FORMATS.
 NOTE: Format SESFMT has been output.
 63         
 
 NOTE: PROCEDURE FORMAT used (Total process time):
       real time           0.02 seconds
       cpu time            0.02 seconds
       
 64         data tweet;
 
 65              infile '/folders/myfolders/2453f15/birdlung.data.txt';
 66              input cancer sex ses birdkeep age yrsmoke cigday;
 67              format sex sexfmt.;
 68              format ses sesfmt.;
 69              format cancer birdkeep ynfmt.;
 70         
 
 NOTE: The infile '/folders/myfolders/2453f15/birdlung.data.txt' is:
       Filename=/folders/myfolders/2453f15/birdlung.data.txt,
       Owner Name=root,Group Name=vboxsf,
       Access Permission=-rwxrwx---,
       Last Modified=08Oct2015:21:01:02,
       File Size (bytes)=3379
 
 NOTE: 147 records were read from the infile '/folders/myfolders/2453f15/birdlung.data.txt'.
       The minimum record length was 21.
       The maximum record length was 22.
 NOTE: The data set WORK.TWEET has 147 observations and 7 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.06 seconds
       cpu time            0.06 seconds
       
 71         proc freq;
 
 72              tables cancer sex ses birdkeep cigday;
 73         
 
 NOTE: There were 147 observations read from the data set WORK.TWEET.
 NOTE: PROCEDURE FREQ used (Total process time):
       real time           0.23 seconds
       cpu time            0.23 seconds
       
 74         proc means;
 
 75              var age yrsmoke cigday;
 76         
 
 NOTE: There were 147 observations read from the data set WORK.TWEET.
 NOTE: PROCEDURE MEANS used (Total process time):
       real time           0.06 seconds
       cpu time            0.06 seconds
       
 77         proc logistic order=internal descending; /* Always use descending for 0-1 DV */
 
 78              model cancer = sex ses birdkeep age yrsmoke cigday;
 79              smoke: test yrsmoke = cigday = 0;
 80         
 81         
 82         
 83         
 84         
 85         OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 97