topic Re: Help creating bar chart of binary variable within groups (and including CI or std) in SAS Programming

Help creating bar chart of binary variable within groups (and including CI or std)

cjp13 — Wed, 22 Apr 2020 10:08:36 GMT

Really basic question here!

I have categorized my data into age groups (age5y) and want to create a vertical bar chart of the percentage of each age group that has a certain health condition (IAD, UKAD, IAS02_new, IAR02_new). These health condition variables are binary (0=no, 1=yes). The chart produced with the code below shows the percentage of the age group's frequency of having that condition out of the TOTAL number of cases in the sample instead of the percentage of those who have the condition among that age group.

I have tried changing stat to percent as well but that doesn't help.

proc sgplot data=recode;
vbar age5y / response=IAD stat=pct limitstat=clm;
run;

I am happy to change the chart type if necessary. I would also like to include confidence intervals or standard deviations.

Eventually, I would like to cluster the conditions such that I have the percentage of each condition per age group in one chart.

Thanks so much!

Re: Help creating bar chart of binary variable within groups (and including CI or std)

ed_sas_member — Wed, 22 Apr 2020 11:30:10 GMT

Hi @cjp13

Could you please provide some sample data?

Best,

Re: Help creating bar chart of binary variable within groups (and including CI or std)

djmangen — Wed, 22 Apr 2020 13:42:27 GMT

Try something like this:

proc sgplot data=temp;
vbar x1 / group=age groupdisplay=cluster stat=percent;
where x1=1;
run;

Re: Help creating bar chart of binary variable within groups (and including CI or std)

cjp13 — Wed, 22 Apr 2020 17:09:09 GMT

When I do that, I still get a chart that reports percentage of the total number of cases of all age groups.

I would like each bar to represent the percentage of positives per age group. For example, for my <6m age group, there were 29/235 positive samples for 12.3% for IAD. IAD is the variable name (this table is from Excel). Note: there are more age groups in my age6mo variable than I have listed in the table below. It is abbreviated for brevity. I am also trying to get the 95% CI on each bar.

Age6mo	<6m	6-11m	12-17m	18-23m	24-29m	30-35m	36-41m	42-47m	48-53m	54-59m
N	235	215	239	234	230	228	229	217	242	172
IAD count	29	43	40	42	40	30	29	22	22	19
IAD percent	12.3%	20.0%	18.0%	19.7%	23.9%	16.2%	15.7%	13.8%	12.0%	15.1%

Re: Help creating bar chart of binary variable within groups (and including CI or std)

cjp13 — Wed, 22 Apr 2020 17:09:37 GMT

I just posted some data below. Thank you!

Re: Help creating bar chart of binary variable within groups (and including CI or std)

ballardw — Wed, 22 Apr 2020 22:19:46 GMT

@cjp13 wrote:
I just posted some data below. Thank you!

I don't see any data. I see a picture of a summary table of some sort.

Instructions here: https://communities.sas.com/t5/SAS-Communities-Library/How-to-create-a-data-step-version-of-your-data-AKA-generate/ta-p/258712 will show how to turn an existing SAS data set into data step code that can be pasted into a forum code box using the <> icon or attached as text to show exactly what you have and that we can test code against.

Very likely your existing data needs to be massaged but can't make a specific recommendation because I can't see any data.