Back-fill Hospice Events

[aguynamedryan]

Split off from #248:

Additional logic is needed to fill out the events table for hospice events. The last hospice event for a patient contains the discharge date, LOS, and discharge status. It would be nice if Jigsaw took this information from the last hospice event and back-filled these cells in all prior hospice events output in the events table.

[aguynamedryan]

@jenniferduryea, @markdanese, do we plan to use discharge date/status or LoS for inclusion/exclusion or T0?

Are there situations where this "last hospice" event is somehow not included in the events table?

If the answer to the above two questions is "no", then I think this is a good candidate for "post processing" and not ConceptQL

[jenniferduryea]

@aguynamedryan good questions. I believe we can use this for inclusion/exclusion and t0. I also think the "last hospice" event may not be included in the events table, just due to study window cut offs. In that case, we would just not backfill, leave the fields blank.