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12-11-2017 02:33 PM

Hi all;

Kinda stumped on this and I'll see if I can explain it well

What I have are patient encounters with multiple catheter insertions and/or multiple surgeries-

So a patient encounter may be

PT_ENC_NUMBER CATH_TIME1 CATH_TIME2 SURG_START1 SURG_START2 SURG_END1 SURG_END2

123 01JAN17:12:00:00 05JAN17:12:00:00 01JAN17:10:00:00 07JAN17:13:00:00 01JAN17:13:00:00 07JAN17:17:00

So here Cath 1 was inserted in surg 1 but not Surgery2

Cath2 was not inserted in surgery1 or surgery2. So I know the total number of surgical insertions was 1-

All in all, its dynamic but let's say a patient can have up to 30 surgeries and 8 catheter insertions

I think I need a multi-dimension array but having some challenges overall;

Any advice appreciated.

Lawrence

Accepted Solutions

Solution

12-11-2017
03:42 PM

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12-11-2017 03:21 PM

You don't really show any desired result or explained it very clearly so I'll be guessing here.

I suspect that you want 3 separate arrays for the comparisons, one that would be the catheter times and the second the surgery start and the last the surgery end_end times.

Depending upon the desired result something like this may get you started. This assumes none of the surgery start/end pairs overlap and that the insertion occurs within a single interval and that all of your datetime variables are SAS valued datetimes. If they are character this won't work.

data example; set have; array c cath_time: ; array ss surg_start: ; array se surg_end; array ws {8}; /* this willl hold which surgery had an insertion number MUST match number of cath_time variables*/ do 1 = 1 to dim(ss); do j= 1 to dim(c); if ss[i] le c[j] le se[i] then do; /* found an insertion in the ith surgery for the jth cath*/ ws [j] = i; end; end; End; /* if you want a total number of cath insertions*/ NumInsert = n(of ws(*)); run;

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12-11-2017 03:09 PM

Hi Lawrence,

My answer assumes that you have the start and end time for every surgery the patient had (aka. matching surg_startx and surg_endx).

```
data temp;
input PT_ENC_NUMBER @@;
input (CATH_TIME1 CATH_TIME2 SURG_START1 SURG_START2 SURG_END1 SURG_END2) ( :datetime.);
format CATH_TIME1 CATH_TIME2 SURG_START1 SURG_START2 SURG_END1 SURG_END2 datetime.;
datalines;
123 01JAN17:12:00:00 05JAN17:12:00:00 01JAN17:10:00:00 07JAN17:13:00:00 01JAN17:13:00:00 07JAN17:17:00
124 10JAN17:12:00:00 15JAN17:12:00:00 01JAN17:10:00:00 07JAN17:13:00:00 01JAN17:13:00:00 07JAN17:17:00
124 01JAN17:12:00:00 07JAN17:15:00:00 01JAN17:10:00:00 07JAN17:13:00:00 01JAN17:13:00:00 07JAN17:17:00
;
run;
data solution;
set temp;
array caths [*] cath: ;
array surg_s [*] surg_start: ;
array surg_e [*] surg_end: ;
total=0;
do i = 1 to dim(caths);
do j = 1 to dim(surg_s);
if surg_s[j]<=caths[i]<=surg_e[j] then total+1;
end;
end;
run;
```

Solution

12-11-2017
03:42 PM

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12-11-2017 03:21 PM

You don't really show any desired result or explained it very clearly so I'll be guessing here.

I suspect that you want 3 separate arrays for the comparisons, one that would be the catheter times and the second the surgery start and the last the surgery end_end times.

Depending upon the desired result something like this may get you started. This assumes none of the surgery start/end pairs overlap and that the insertion occurs within a single interval and that all of your datetime variables are SAS valued datetimes. If they are character this won't work.

data example; set have; array c cath_time: ; array ss surg_start: ; array se surg_end; array ws {8}; /* this willl hold which surgery had an insertion number MUST match number of cath_time variables*/ do 1 = 1 to dim(ss); do j= 1 to dim(c); if ss[i] le c[j] le se[i] then do; /* found an insertion in the ith surgery for the jth cath*/ ws [j] = i; end; end; End; /* if you want a total number of cath insertions*/ NumInsert = n(of ws(*)); run;

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Posted in reply to ballardw

12-11-2017 03:46 PM

Ballard;

As I said I having some trouble articulating what the results I was trying to get but you nailed 99.9% of the way there. I had to make a minor change but saved me a lot of hours spinning my wheels!

Thanks again-I love this forum!

Lawrence

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Posted in reply to ballardw

12-14-2017 04:55 AM

Ok Ballardw I am back with a follow up question-

So I have expanded the array a bit and everything works pretty well except for the components in red. I can tell by manually comparing the data.

The expanded version not just looks if the catheter was placed during a surgery but also there is a binary flag to whether that surgery was under 4 hours. SO now I need surgeries whether catheter was placed in OR and another array to tell me if catheter was placed in OR and surgery was <4 hours. The array that calculates whether it was done in surgery works great (Thank you again)

I have tried different combinations to no avail.

data hairyarray;

retain cath_day SURG SURG_INSERT POD surg_under4hr SURG_INSERT4HR ED_STAY INPT_INSERTION;

merge toarray final_cath_transpo final_surg_transpo final_cath_transpo_placement;

by pat_enc_csn_id;

array c START_DT: ; /*ARRAY FOR THE CATH START TIMES*/

array ce END_DT: ; /*ARRAY FOR THE CATH END TIMES*/

array ss LOG_PAT_IN_ROOM_TIME: ; /*ARRAY FOR THE SURG START TIMES*/

array se LOG_PAT_OUT_OF_ROOM_TIME: ; /*ARRAY FOR SURG END TIMES*/

array Surgfour surg_under4hr: ; /*ARRAY FOR THE SURG FOR UNDER 4 HOURS*/

array ws {&finalcath} ; /*ARRAY TO DETERMINE IF CATH PLACED IN OR*/

array podx {&finalcath} ; /*ARRAY TO DETERMINE IF CATH REMOVED POD1*/

array surgx{&finalsurgc} ;/*ARRAY TO COUNTS NUMBER OF SURGERIES*/

array SURGfouri{&finalcath} ;/*ARRAY TO DETERMINE IF CATH PLACED IN OR AND SURG UNDER 4 HOURS*/

do i = 1 to dim(ss);

do j= 1 to dim(c);

if ss[i] le c[j] le se[i] then do;

ws [j] = i;

if ws [j] = &finalsurgc then ws [j]=.; /*DELETES INCORRECT ENTRIES*/

if ws [j]=i and Surgfour[i]^=. then SURGfouri[j]=i;

if ws [j]^=. and intck('dtday', se[i],ce[j])<2 then podx[j]=i; /*THIS GETS WHETHER IT WAS POD1 OR NO*/

if podx[j]=&finalsurgc-1 then podx[j]=.; /*DELETES INCORRECT ENTRIES*/

end;

if ss[i] ^=. then surgx[i]=1; /*COUNTS THE SURGERIES*/

if SURGfouri[j]>n(of surgx(*)) then SURGfouri[j]=.;

end;

end;

; /*TOTALS NUMBEROF SURGICAL INSERTIONS*/

POD = n(of PODx(*)); /*TOTALS NUMBER OF POD1 REMOVALS*/

SURG=n(of surgx(*)); /*TOTALS NUMBER OF SURGERIES*/

SURG_INSERT = n(of ws(*)); /*TOTALS NUMBER OF SURGICAL INSERTIONS*/

SURG_INSERT4HR=n(of SURGfouri(*)); /*TOTALS NUMBER OF SURGICAL INSERTIONS <4 HRS*/

run;

Thanks for your time again.

Lawrence

(ps If I am not making sense I apologize it's late)