Chapter 5, Section 5.4

Treatment of Lead Exposed Children Trial (TLC)

Analysis of Response Profiles of Blood Lead Levels

data tlc;

infile 'tlc.dat';

input id group $ lead0 lead1 lead4 lead6;

y=lead0; time=0; output;

y=lead1; time=1; output;

y=lead4; time=4; output;

y=lead6; time=6; output;

drop lead0 lead1 lead4 lead6;

title1 Analysis of Response Profiles of data on Blood Lead Levels;

title2 Treatment of Lead Exposed Children (TLC) Trial;

**************************************************************************;

* Uncomment to change reference levels for group and time *;

**************************************************************************;

*proc sort;

*by group descending time;

proc mixed noclprint=10 order=data;

class id group time;

model y = group time group*time / s chisq;

repeated time / type=un subject=id r;

run;