Do not input private or sensitive data. View Qlik Privacy & Cookie Policy.
Skip to main content

Announcements
Join us to spark ideas for how to put the latest capabilities into action. Register here!
cancel
Showing results for 
Search instead for 
Did you mean: 
Lauri
Specialist
Specialist

Set Analysis with FirstSortedValue

I'd like to count the number of patients whose last blood pressure in the year was below 140. I am able to find the value of the last blood pressure like this in a chart:

=FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date)

This correctly returns the value every time.

When I try to count patients for whom this is true, it does not work. My measure:

=Count(distinct {<PatientID={"=(FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date)<140)"}>} PatientID)

Any clues why this does not work? 

1 Solution

Accepted Solutions
MayilVahanan

Hi

Try like below

Sum(Aggr(If(FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date) < 140, 1), PatientID))

Thanks & Regards, Mayil Vahanan R
Please close the thread by marking correct answer & give likes if you like the post.

View solution in original post

3 Replies
MayilVahanan

Hi

Try like below

Sum(Aggr(If(FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date) < 140, 1), PatientID))

Thanks & Regards, Mayil Vahanan R
Please close the thread by marking correct answer & give likes if you like the post.
sasikanth
Master
Master

HI, 

Try below expression

 

count({DISTINCT< PatientID={" =Aggr(FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date),PatientID)<140"}>}PatientID)

Lauri
Specialist
Specialist
Author

Thank you both, Sasi and Mayil. You got me on the right track with Aggr, this way:

count(DISTINCT If(aggr({<IsSameYear={1}, AsOfYear>} FirstSortedValue({<IsSameYear={1}, FactType={BP}>} [BP SYSTOLIC], -Date), PatientID, AsOfYear)<140, PatientID))