We have a HIV tracker, and we want a program indicator to count the patients who Initiated Antiretroviral Therapy Within 6 Months of HIV Diagnosis (we have two fields: HIV diagnosis date and ART initiation date). We came across clues below, but we would like to have a full understanding of how we should get a program indicator working to get the correct output.
d2:daysBetween(V{analytics_period_start}, Date DE})… && d2:daysBetween(Date DE}, V{analytics_period_end})…
Why not use the d2:monthsBetween and set that the months between the first event “ART” and the second “HIV Diagnosis” should be greater than 0 months and less than 7 months in the filter.
I asked the AI in docs.dhis2.org and it provided the following response :
The expression d2:daysBetween(V{analytics_period_start}, Date DE})… && d2:daysBetween(Date DE}, V{analytics_period_end})… is using the d2:daysBetween function of DHIS2, which calculates the number of days between two dates.
In this case, it’s being used twice in a logical AND (&&) operation. The first part d2:daysBetween(V{analytics_period_start}, Date DE}) is calculating the number of days between the start of the analytics period (V{analytics_period_start}) and a certain date (Date DE).
The second part d2:daysBetween(Date DE}, V{analytics_period_end}) is calculating the number of days between the same date (Date DE) and the end of the analytics period (V{analytics_period_end}).
The entire expression will evaluate to true only if both parts are true. That is, the date (Date DE) falls within the analytics period (from V{analytics_period_start} to V{analytics_period_end}).
Please note that Date DE seems to represent a date data element, but without the specific context or the actual data element ID, I can’t provide more specific information.
Please keep us updated how you proceed or if you have more questions about the explanation in the training or the AI response. Thanks!
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