An Analysis on Danish Micro Data - School of Economics and ...

libname b '/akf/702517/ycb2517/Initial';
libname ud '/akf/702517/ycb2517/Initial';
/*Construction of a new dataset with all the people taking MTX and
construction of a new variable ’number of defined daily dosages
bought’*/
data test1;
set b.lmdbcollect;
KEEP apk atc ddd alder udtrnr aar;
proc sort data=test1;
by udtrnr aar;
data ud.lmdbMTX;
set test1;
if ATC='L04AX03'or ATC='L01BA01';
ADDK=APK*DDD;
data test2;
set b.lmdbMTX;
/*summarising the patient’s yearly consumption of MTX in the
variable MTX*/
data test1;
set b.lmdbmtx;
proc sort data=test1;
by udtrnr aar;
data sumf;
set test1;
by udtrnr aar;
/*BY statement creates First.udtrnr, Last.udtrnr, First.aar, and
Last.aar*/
if First.aar then MTX=0;
/*Set MTX to 0 when subgroup changes*/
MTX+ADDK;
/*Sum statement creates MTX, retains it, sets initial value to 0,
and ignores missing
values of ADDK*/
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