MIMIC-IV services hadm_id same length with admission hadm_id

[albarabimakasa]

Documentation issues only

i want to ask why service hadm_id same length with admission hadm_id. with some of service hadm_id value have multiple value and admission hadm_id have unique service i'am confuse why it's have same length.

service hadm_id length = 523739
admission hadm_id length = 523740

services['hadm_id'].value_counts()
output:
28755811 10
23344494 9
25317420 9
23200913 9
26510507 9
..
23327325 1
28749425 1
25937938 1
26582560 1
24967395 1

it's make sense when service hadm_id value have multiple value because one patients maybe requaire several service. but i am confuse why they length are same ? i am just guessing that there is some patient service in admission that not recorded ?

[SichengH]

In medical databases, missing data are fairing common. I would highly suggest you work with someone with clinical knowledge.

In the future, I would suggest putting questions like this in the "mimic-code" repo.