why does the mimic_admission only has 256878 patients,but mimic_core has 382278 patients.

[pike8801]

why does the mimic_admission only has 256878 distinct subject_id,but mimic_core has 382278 distinct subject_id?

[marymlucas]

Just taking a stab in the dark here, but the missing IDs might be patients who were discharged from the ER and not admitted into the hospital.