Chapter 2, Section 2.4

Treatment of Lead Exposed Children Trial (TLC)

Means, Correlations and Covariances of Blood Lead Levels

data lead;

infile 'tlc.dat';

input id group $ lead0 lead1 lead4 lead6;

title1 Subsample (N=50) of data on Blood Lead Levels from the Placebo Group;

title2 Treatment of Lead Exposed Children (TLC) Trial;

proc corr cov;

var lead0 lead1 lead4 lead6;

where group='P';

run;

title1 Subsample (N=50) of data on Blood Lead Levels from the Succimer Group;

title2 Treatment of Lead Exposed Children (TLC) Trial;

proc corr cov;

var lead0 lead1 lead4 lead6;

where group='A';

run;