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Hello All,
I'm trying to calculate the number of days between two appointments where the first appointment could be one of two types. in the below table it would be the days between the earlier of appointment type one or two and appointment three.
Patient ID | Appointment Type | Appintment Date |
112233 | Type 1 | 01/10/2017 |
112233 | Type 2 | 01/11/2017 |
112233 | Type 3 | 01/01/2018 |
223344 | Type 1 | 01/10/2017 |
223344 | Type 2 | 01/09/2017 |
223344 | Type 3 | 01/01/2018 |
For for example patient 112233, would be days between appointment type 1 (being the earlier of appointment 1 and 2) and appointment type 3, so 61 days.
I am thinking a calculated column which returns the earliest date of the two filtered by patient ID and then just a datediff between the two dates on the row with appointment type 3.
Any thoughts?
Martin
Solved! Go to Solution.
Measure = VAR EarlierAppointment = CALCULATE ( MIN ( TableName[Appintment Date] ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 1" || TableName[Appointment Type] = "Type 2" ) ) VAR Type3Date = CALCULATE ( FIRSTNONBLANK ( TableName[Appintment Date], 1 ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 3" ) ) VAR Start_date = MIN ( EarlierAppointment, Type3Date ) VAR End_date = MAX ( EarlierAppointment, Type3Date ) RETURN DATEDIFF ( Start_date, End_date, DAY )
Depends on if you need the values as a column, or if a measure would suffice (measures are preferred from a performance standpoint).
Try this measure:
[Measure] = VAR CurrentPatient = VALUES ( TableName[Patient ID] ) VAR Appointment3Date = CALCULATE ( MIN ( TableName[Appointment Date] ), TableName[Appointment Type] = "Type 3", TableName[Patient ID] IN CurrentPatient ) VAR EarliestAppointmentDate = CALCULATE ( MIN ( TableName[Appointment Date] ), TableName[Appointment Type] IN { "Type 1", "Type 2" }, TableName[Patient ID] IN CurrentPatient ) RETURN Appointment3Date - EarliestAppointmentDate
Variables make it easy to call out what each part of the calculation is doing.
Thank you @Zubair_Muhammad and @Anonymous
Chris,
I used your measure but made a slight change to the return,
Changed your to
DATEDIFF(EarliestAppointmentDate,AppointmentDate,day)
Giving me days as opposed to a date formate.
It appears to be working, time to do testing.
Thank you so much.
@Anonymous
Hi Again,
Immidiately ran into two issues.
Thank you again.
Martin
Measure = VAR EarlierAppointment = CALCULATE ( MIN ( TableName[Appintment Date] ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 1" || TableName[Appointment Type] = "Type 2" ) ) VAR Type3Date = CALCULATE ( FIRSTNONBLANK ( TableName[Appintment Date], 1 ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 3" ) ) VAR Start_date = MIN ( EarlierAppointment, Type3Date ) VAR End_date = MAX ( EarlierAppointment, Type3Date ) RETURN DATEDIFF ( Start_date, End_date, DAY )
Thank you very much, I believe I have a solution now. Trial and error.
Try this calculated column
Column = VAR EarlierAppointment = CALCULATE ( MIN ( TableName[Appintment Date] ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 1" || TableName[Appointment Type] = "Type 2" ) ) VAR Type3Date = CALCULATE ( FIRSTNONBLANK ( TableName[Appintment Date], 1 ), FILTER ( ALLEXCEPT ( TableName, TableName[Patient ID] ), TableName[Appointment Type] = "Type 3" ) ) RETURN DATEDIFF ( EarlierAppointment, Type3Date, DAY )
Hopefully This formula will work as a MEASURE as well
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