Modifying SAS table counts - arrays

Question

I am attempting to use the following code from Jack Shostak's book 'SAS Programming in the Pharmaceutical Industry' for a medications table in SAS:
PROC SQL NOPRINT;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n1
FROM ADSL
WHERE TRTPN = 1;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n2
FROM ADSL
WHERE TRTPN = 0;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n3
FROM ADSL
WHERE TRTPN NE .;
QUIT;
PROC SQL NOPRINT;
CREATE TABLE CMTOSUM AS
SELECT UNIQUE(C.CMDECOD) AS CMDECOD, C.USUBJID, T.TRTPN
FROM CM AS C, ADSL AS T
WHERE C.USUBJID = T.USUBJID
ORDER BY USUBJID, CMDECOD;
QUIT;
ODS LISTING CLOSE;
ODS OUTPUT CROSSTABFREQS = COUNTS;
PROC FREQ DATA = CMTOSUM;
TABLES TRTPN * CMDECOD;
RUN;
ODS OUTPUT CLOSE;
ODS LISTING;
PROC SORT DATA = COUNTS;
BY CMDECOD;
RUN;
DATA CM;
MERGE COUNTS(WHERE = (TRTPN = 1) RENAME = (FREQUENCY = COUNT1))
COUNTS(WHERE = (TRTPN = 0) RENAME = (FREQUENCY = COUNT2))
COUNTS(WHERE = (TRTPN = .) RENAME = (FREQUENCY = COUNT3))
END = EOF;
BY CMDECOD;
KEEP CMDECOD ROWLABEL COL1-COL3 SECTION;
LENGTH ROWLABEL $25 COL1-COL3 $10;
IF CMDECOD = '' THEN
DO;
ROWLABEL = 'ANY MEDICATION';
SECTION = 1;
END;
ELSE
DO;
ROWLABEL = CMDECOD;
SECTION = 2;
END;
PCT1 = (COUNT1/ &n1) *100;
PCT2 = (COUNT2/ &n2) *100;
PCT3 = (COUNT3/ &n3) *100;
COL1 = PUT(COUNT1, 3.) || " (" || PUT(PCT1, 3.) || "%)";
COL2 = PUT(COUNT2, 3.) || " (" || PUT(PCT2, 3.) || "%)";
COL3 = PUT(COUNT3, 3.) || " (" || PUT(PCT3, 3.) || "%)";
RUN;
This code correctly tabulates the number of subjects within each treatment arm on specific medications. However, when I run this code it generates a count based on the number of medications in the 'ANY MEDICATION' row rather than the total number of subjects. Currently the percentage exceeds 100; I would like to modify the count so that it stops once it hits the total number of subjects in each treatment arm. Any insight would be appreciated.

Answer 1

I was able to resolve the issue by adding the following lines of code:
IF COUNT1 GE &N1 THEN COUNT1 = &n1;
IF COUNT2 GE &N2 THEN COUNT2 = &n2;
IF COUNT3 GE &N3 THEN COUNT3 = &n3;
This restricts the counts to total number of subjects within each group.
Below is the updated code for reference.
PROC SQL NOPRINT;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n1
FROM ADSL
WHERE TRTPN = 1;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n2
FROM ADSL
WHERE TRTPN = 0;
SELECT COUNT(DISTINCT USUBJID) FORMAT = 3.
INTO :n3
FROM ADSL
WHERE TRTPN NE .;
QUIT;
PROC SQL NOPRINT;
CREATE TABLE CMTOSUM AS
SELECT UNIQUE(C.CMDECOD) AS CMDECOD, C.USUBJID, T.TRTPN
FROM CM AS C, ADSL AS T
WHERE C.USUBJID = T.USUBJID
ORDER BY USUBJID, CMDECOD;
QUIT;
ODS LISTING CLOSE;
ODS OUTPUT CROSSTABFREQS = COUNTS;
PROC FREQ DATA = CMTOSUM;
TABLES TRTPN * CMDECOD;
RUN;
ODS OUTPUT CLOSE;
ODS LISTING;
PROC SORT DATA = COUNTS;
BY CMDECOD;
RUN;
DATA CM;
MERGE COUNTS(WHERE = (TRTPN = 1) RENAME = (FREQUENCY = COUNT1))
COUNTS(WHERE = (TRTPN = 0) RENAME = (FREQUENCY = COUNT2))
COUNTS(WHERE = (TRTPN = .) RENAME = (FREQUENCY = COUNT3))
END = EOF;
BY CMDECOD;
KEEP CMDECOD ROWLABEL COL1-COL3 SECTION;
LENGTH ROWLABEL $25 COL1-COL3 $10;
IF COUNT1 GE &N1 THEN COUNT1 = &n1;
IF COUNT2 GE &N2 THEN COUNT2 = &n2;
IF COUNT3 GE &N3 THEN COUNT3 = &n3;
IF CMDECOD = '' THEN
DO;
ROWLABEL = 'ANY MEDICATION';
SECTION = 1;
END;
ELSE
DO;
ROWLABEL = CMDECOD;
SECTION = 2;
END;
PCT1 = (COUNT1/ &n1) *100;
PCT2 = (COUNT2/ &n2) *100;
PCT3 = (COUNT3/ &n3) *100;
COL1 = PUT(COUNT1, 3.) || " (" || PUT(PCT1, 3.) || "%)";
COL2 = PUT(COUNT2, 3.) || " (" || PUT(PCT2, 3.) || "%)";
COL3 = PUT(COUNT3, 3.) || " (" || PUT(PCT3, 3.) || "%)";
RUN;