definitions

	A	B	C	D
1	Unified Concept	MIMIC-III	MIMIC-IV	eICU-CRD

2	subject_id	SUBJECT_ID	subject_id	uniquepid
3	hospital_admission_id	HADM_ID	hadm_id	patienthealthsystemstayid
4	icustay_id	STAY_ID	icustay_id	patientunitstayid
5	source_db	mimic_iii	mimic_iv	eicu
6	hospitalid	9999	9999	hospitalid
7	numbedscategory	>= 500	>= 500	numbedscategory
8	teachingstatus	TRUE	TRUE	teachingstatus
9	region	Northeast	Northeast	region
10	age (at admission)	> 90 = 90	> 90 = 90	> 89 = 90
11	sex_female	gender	gender	gender
12	weight_admission	weight_first	first_day_weight	admissionweight
13	height_admission	height_first	first_day_height	admissionheight
14	BMI_admission	weight_admission / ( (height_admission / 100) ^ 2 )
15	datetime_hospital_admit	admittime	admittime	1 Jan 2014
16	datetime_hospital_discharge	dischtime	dischtime	1 Jan 2014 + hospitaldischargeoffset
17	datetime_icu_admit	intime	icu_intime	unitadmitoffset
18	datetime_icu_discharge	outtime	icu_outtime	unitdischargeoffset
19	los_hospital	los_hospital	los_hospital	hospitaldischargeoffset - hospitaladmissionoffset
20	los_ICU	los_icu	los_icu	icu_los_hours / 24
21	comorbidity_score_name	Elixhauser	Charlson	Charlson
22	in_hospital_mortality	hospital_expire_flag	hospital_expire_flag	hosp_mort
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