Dear All
I have been having some troubles with determining the average (mean) of event counts over a period of time.
In our current example, we are doing population counts each day for an event-based program. However, we need to determine the average of the population counts within a month. The trick is that the number of counts in a month may vary per site.
For example, we may have the following situation in Month 1 in survey site 1:
Day 1 (1 August): 20 people
Day 2 (3 August): 30 people
Day 3 (12 August): 70 people
Month 2 in survey site 1 may be:
Day 1 (12 September): 20 people
Day 2 (13 September): 30 people
I need to determine the average population count per month for each survey site. In this particular example, I can create a program indicator that determines the total count per month (thanks @Gassim ). In this example for Month 1, it would be 120 people. The next step would be to determine the average. That is easy to calculate (i.e., 120/3 = 40). However, it is not possible to do “Event count where event date is unique” in DHIS2 in any way that I could figure out.
I think I may have determined a workaround though, but I am wondering (and hoping) whether there is a more elegant and less convoluted way to do it.
We would add in a data element called “Survey day” with options of “1”, “2”, “3”, etc.
I would then need to create a program indicator that was set to “Count” with the following expression:
Program indicator 1: V{event_count} – (V{event_count} – 1) and Filter “Survey day” == “1”
Program indicator 2: V{event_count} – (V{event_count} – 1) and Filter “Survey day” == “2”
Program indicator 3: …. Etc.
That would give me a value of 1 if there is any data associated with that survey day. I would then repeat this for all survey days.
I would then need to create an Indicator as follows:
total events per month / (sum(Program indicator 1, Program indicator 2, Program indicator 3, etc.)
I would need to add in a condition: “Program indicator 1 >0” to avoid dividing by “-1” (if the survey day has no data).
I understand that this is extremely convoluted and confusing, but I have been wracking my brain and searching through the documentation to try to find a solution (by the way, the AI helpbot in the documentation is great!). Could anyone assist?
Thanks in advance!
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