topic Re: Calculate mean using proc sql and case when in SAS Programming

Calculate mean using proc sql and case when

gzr2mz39 — Fri, 15 Sep 2017 20:16:53 GMT

I would like to find two means of a field called close_diff.
close_diff has some missing values.
One mean (mean_ca_close_diff) is conditional on incident_with_ca=1 and action (character field) not equal to missing.
The other (mean_noca_close_diff) mean is conditional on incident_with_ca=1 and action (character field) equal to missing.
The two means calculated using the code below are the same, however, they shouldn't be.
Any idea how to fix this?

proc sql;
create table EE_1 as
select *,
case when (incident_with_ca=1 and action ne "")
then mean(close_diff) else . end as mean_ca_close_diff,
case when (incident_with_ca=1 and action = "")
then mean(close_diff) else . end as mean_noca_close_diff
from EE
group by INJURY_YEAR
order by EHS_ID
;
quit;

Thank you.

Re: Calculate mean using proc sql and case when

SAS_inquisitive — Fri, 15 Sep 2017 20:36:17 GMT

Case when syntax is not correct.

Re: Calculate mean using proc sql and case when

gzr2mz39 — Fri, 15 Sep 2017 20:38:15 GMT

OK, how should I fix the syntax?

Re: Calculate mean using proc sql and case when

SAS_inquisitive — Fri, 15 Sep 2017 20:48:09 GMT

I will post when I get home.

Re: Calculate mean using proc sql and case when

SAS_inquisitive — Fri, 15 Sep 2017 21:44:44 GMT

proc sql;
	create table EE_1 as
		select *,
	
		mean(case 
				when incident_with_ca=1 and action ne ""
				then close_diff else . 
			 end) as mean_ca_close_diff,
	
		mean(case 
				when incident_with_ca=1 and action = ""
				then close_diff else . 
			end) as mean_noca_close_diff
	from EE
		group by INJURY_YEAR
			order by EHS_ID
	;
quit;

Re: Calculate mean using proc sql and case when

gzr2mz39 — Tue, 19 Sep 2017 03:50:32 GMT

Thank you.