topic Finding a cutoff value across years for a specific ID in SAS Programming

Finding a cutoff value across years for a specific ID

jcis7 — Wed, 17 Aug 2022 20:17:41 GMT

G'day,

I've a question -- I'm trying to find observations below a certain cutoff value across any four years for the same ID.

Here's the data below and what I tried. I realized it doesn't work. what i want is to have identify in a list that has ids which are below 90 for any four years (Yr), something like the table below. Any help you can give is much appreciated. Or is there a better way to do it in proc sql? Can this be done in the DATA step? Thank you!

id	pctvax2000	pctvax2001	pctvax2002	pctvax2003	pctvax2004	pctvax2005	pctLT90_2000	pctLT90_2001	pctLT90_2002	pctLT90_2003	pctLT90_2004	pctLT90_2005	any4
1234567	88	90	57	95	77	62	1	0	1	0	1	1	4
1234568	82	91	53	78	90	95	1	0	1	1	0	0	5


*--2017-18 ;
DATA vax;
 INPUT id $ pctvax  yr $;
CARDS;
1234567 88 2000
1234567 90 2001 
1234565 57 2002
1234567 95 2003 
1234567 77 2004
1234567 62 2005 
1234568 82 2000
1234568 91 2001 
1234568 53 2002
1234568 78 2003 
1234568 90 2004
1234568 45 2005 

;
RUN; 

data vax1;
  set vax;
   if yr='2000' then do;
     pctvax2000=pctvax;
     if pctvax2000<90 then pctLT90_2000=1; 
   end;

   if yr='2001' then do;
      pctvax2001=pctvax;
     if pctvax2001<90 then pctLT90_2001=1; 
   end;
   
    if yr='2002' then do;
    pctvax2002=pctvax;
     if pctvax2002<90 then pctLT90_2002=1;      
   end;

      if yr='2003' then do;
     pctvax2003=pctvax;
     if pctvax2003<90 then pctLT90_2003=1; 
   end;

      if yr='2004' then do;
    pctvax2004=pctvax;
     if pctvax2004<90 then pctLT90_2004=1; 
   end;

      if yr='2005' then do;
     pctvax2005=pctvax;
     if pctvax2005<90 then pctLT90_2005=1; 
   end;

   if sum(pctLT90_2000, pctLT90_2001, pctLT90_2002, pctLT90_2003, pctLT90_2004, pctLT90_2005)=4 then  any4=1;
   else any4=0;

   run;

Re: Finding a cutoff value across years for a specific ID

Reeza — Wed, 17 Aug 2022 20:49:09 GMT

You say any of the 4 years but you're looking for all 4 years. Is the criteria, any of the 4 years is less than 90% or all of the four years less than 90%?

Two different approaches below - SQL to generate a single list of IDs or transpose and data step to generate a table more similar to what you have below.

proc sql;
create listID_lt90 as
select distinct ID
from vax where pctvax <90;
quit;

proc transpose data=vax out=vax_wide prefix=pctvax;
by id;
id year;
var pctvax;
run;

data want;
set vax_wide;
if min(of pctvax:) < 90 then any4 = 1;
else any4=0;
run;

Also, you may be able to modify our code (untested) by changing this criteria:

 if sum(pctLT90_2000, pctLT90_2001, pctLT90_2002, pctLT90_2003, pctLT90_2004, pctLT90_2005)=4 then  any4=1;
   else any4=0;


 if sum(pctLT90_2000, pctLT90_2001, pctLT90_2002, pctLT90_2003, pctLT90_2004, pctLT90_2005)>0 then  any4=1;
   else any4=0;

@jcis7 wrote:

G'day,

I've a question -- I'm trying to find observations below a certain cutoff value across any four years for the same ID.

Here's the data below and what I tried. I realized it doesn't work. what i want is to have identify in a list that has ids which are below 90 for any four years (Yr), something like the table below. Any help you can give is much appreciated. Or is there a better way to do it in proc sql? Can this be done in the DATA step? Thank you!

id pctvax2000 pctvax2001 pctvax2002 pctvax2003 pctvax2004 pctvax2005 pctLT90_2000 pctLT90_2001 pctLT90_2002 pctLT90_2003 pctLT90_2004 pctLT90_2005 any4

1234567 88 90 57 95 77 62 1 0 1 0 1 1 4

1234568 82 91 53 78 90 95 1 0 1 1 0 0 5
*--2017-18 ;
DATA vax;
 INPUT id $ pctvax  yr $;
CARDS;
1234567 88 2000
1234567 90 2001 
1234565 57 2002
1234567 95 2003 
1234567 77 2004
1234567 62 2005 
1234568 82 2000
1234568 91 2001 
1234568 53 2002
1234568 78 2003 
1234568 90 2004
1234568 45 2005 

;
RUN; 

data vax1;
  set vax;
   if yr='2000' then do;
     pctvax2000=pctvax;
     if pctvax2000<90 then pctLT90_2000=1; 
   end;

   if yr='2001' then do;
      pctvax2001=pctvax;
     if pctvax2001<90 then pctLT90_2001=1; 
   end;
   
    if yr='2002' then do;
    pctvax2002=pctvax;
     if pctvax2002<90 then pctLT90_2002=1;      
   end;

      if yr='2003' then do;
     pctvax2003=pctvax;
     if pctvax2003<90 then pctLT90_2003=1; 
   end;

      if yr='2004' then do;
    pctvax2004=pctvax;
     if pctvax2004<90 then pctLT90_2004=1; 
   end;

      if yr='2005' then do;
     pctvax2005=pctvax;
     if pctvax2005<90 then pctLT90_2005=1; 
   end;

   if sum(pctLT90_2000, pctLT90_2001, pctLT90_2002, pctLT90_2003, pctLT90_2004, pctLT90_2005)=4 then  any4=1;
   else any4=0;

   run;

Re: Finding a cutoff value across years for a specific ID

jcis7 — Thu, 18 Aug 2022 14:24:30 GMT

There are 6 years in the data (2000, 2001, 2002, 2003, 2004, 2005) and looking for IDs where pctvax<90 in any four years, for example:
Looking for ids with pctvax<90 in the following combination of years
2000, 2001, 2002, 2003
2000, 2002, 2003, 2004
2000, 2001, 2004, 2005
2001, 2002, 2003, 2004
Etc....

Thank you!

Re: Finding a cutoff value across years for a specific ID

PaigeMiller — Thu, 18 Aug 2022 15:10:14 GMT

Work with VAX which is in a good format to provide the information you want. VAX1 isn't as good.

proc sql;
    create table want as select
    id,sum(pctvax<90) as below90
    from vax group by id;
quit;

Re: Finding a cutoff value across years for a specific ID

jcis7 — Thu, 18 Aug 2022 16:28:30 GMT

Thanks - I'm looking for school year which is in the results of the code you posted. I'm looking for the school year across the top with the school code listed in the column where the current school year is listed in the results of the code you posted.

Re: Finding a cutoff value across years for a specific ID

jcis7 — Thu, 18 Aug 2022 16:55:21 GMT


proc transpose data=vax out=vax_wide prefix=pctvax;
by id;
id year;
var pctvax;
run;

data vax_wide1;
  set vax_wide;
 
  if pctvax2000 < 90 then pctvax2000LT90=1;
  if pctvax2001 < 90 then pctvax2001LT90=1;
  if pctvax2002 < 90 then pctvax2002LT90=1;
  if pctvax2003 < 90 then pctvax2003LT90=1;
  if pctvax2004 < 90 then pctvax2004LT90=1;
  if pctvax2005 < 90 then pctvax2005LT90=1;

if sum (pctvax2000LT90, pctvax2001LT90, pctvax2002LT90, pctvax2003LT90, pctvax2004LT90, pctvax2005LT90) =4 then any4=1;
  else any4=0;
run;

This seems code above seems work for the simplified dataset I created. I'm running into a problem where in the actual dataset, it counts missing values as <90. I can post it as a separate post. Thank you everyone for your help!

Re: Finding a cutoff value across years for a specific ID

Reeza — Thu, 18 Aug 2022 17:08:34 GMT

proc transpose data=vax out=vax_wide prefix=pctvax;
by id;
id year;
var pctvax;
run;

data vax_wide1;
  set vax_wide;
 array pctvax(2000:2005) pctvax2000-pctvax2005;
 array lt90vax(2000:2005) lt90vax2000-lt90vax2005;

*set all to 0;
do year=2000 to 2005;
 lt90vax(year) = 0;
end;

*set to 1 if applicable;
do year=2000 to 2005;
 if not missing(pctvax(year)) and pctvax(year) < 90 then lt90vax(year) = 1;
end;

if sum of lt90vax(*)) =4 then any4=1;
  else any4=0;
run;

Re: Finding a cutoff value across years for a specific ID

PaigeMiller — Thu, 18 Aug 2022 17:10:05 GMT

@jcis7 wrote:
Thanks - I'm looking for school year which is in the results of the code you posted. I'm looking for the school year across the top with the school code listed in the column where the current school year is listed in the results of the code you posted.

This is a poor data layout for data analysis, don't do this.

If you want this data layout in a report or to create an EXCEL spreadsheet, use PROC REPORT from the original data layout in data set VAX.

Re: Finding a cutoff value across years for a specific ID

jcis7 — Thu, 18 Aug 2022 19:38:30 GMT

Great - thank you!

* The code worked until:

401
402 if sum of lt90vax(*))=4 then any4=1;
--
22
76
ERROR 22-322: Syntax error, expecting one of the following: (, [, {.

ERROR 76-322: Syntax error, statement will be ignored.

403 else any4=0;
404 run;

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WANT may be incomplete. When this step was stopped there were 0 observations and 14 variables.
WARNING: Data set WANT was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
real time 0.08 seconds
cpu time 0.00 seconds

* I tried adding a parenthesis and got the following error:

441 end;
442
443 if sum of (lt90vax(*))=4 then any4=1;
-- -
22 386
68 200
76
ERROR 22-322: Syntax error, expecting one of the following: !, !!, &, *, **, +, -, /, ;, <, <=, <>, =, >, ><, >=, AND, EQ,
GE, GT, LE, LT, MAX, MIN, NE, NG, NL, OR, ^=, |, ||, ~=.

ERROR 386-185: Expecting an arithmetic expression.

ERROR 68-185: The function OF is unknown, or cannot be accessed.

ERROR 200-322: The symbol is not recognized and will be ignored.

ERROR 76-322: Syntax error, statement will be ignored.

444 else any4=0;
445 run;

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set N.WANT may be incomplete. When this step was stopped there were 0 observations and 14 variables.
WARNING: Data set N.WANT was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
real time 0.08 seconds
cpu time 0.01 seconds

* Then I tried removing the 'of' and got the following error:

461 end;
462
463 if sum (lt90vax(*))=4 then any4=1;
-
386
200
76
ERROR 386-185: Expecting an arithmetic expression.

ERROR 200-322: The symbol is not recognized and will be ignored.

ERROR 76-322: Syntax error, statement will be ignored.

464 else any4=0;
465 run;

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set N.WANT may be incomplete. When this step was stopped there were 0 observations and 14 variables.
WARNING: Data set N.WANT was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
real time 0.43 seconds
cpu time 0.03 seconds

Thank you!

Re: Finding a cutoff value across years for a specific ID

Reeza — Thu, 18 Aug 2022 19:44:27 GMT

It's missing the opening bracket...I think you should be able to figure where that should go for the sum function 🙂

Re: Finding a cutoff value across years for a specific ID

jcis7 — Thu, 18 Aug 2022 21:18:30 GMT

Thank you! I looked up Sum Function and found: SAS Help Center: SUM Function<>
So now, this works: 😊
if sum (of lt90vax(*))=4 then any4=1;
else any4=0;
run;