Urine output as one of the most important features in differentiating in-hospital death among patients receiving extracorporeal membrane oxygenation: a random forest approach

Chang, Sheng-Nan; Hu, Nian-Ze; Wu, Jo-Hsuan; Cheng, Hsun-Mao; Caffrey, James L.; Yu, Hsi-Yu; Chen, Yih-Sharng; Hsu, Jiun; Lin, Jou-Wei

doi:10.1186/s40001-023-01294-1

Table 2 Demographic data of the 1342 patients receiving ECMO, description of categorical data using missing values as a distinct level

From: Urine output as one of the most important features in differentiating in-hospital death among patients receiving extracorporeal membrane oxygenation: a random forest approach

Variables	Categories	Valid n	%
Sex	Male	959	71.5
Sex	Female	383	28.5
ECMO categories	Cardiovascular	1081	80.6
	Respiratory	252	18.8
	Others	9	0.7
ECMO mode	VA	1119	83.4
ECMO mode	VV	223	16.6
NYHA classification	n.a	79	5.9
	I	600	44.7
	II	314	23.4
	III	218	16.2
	IV	131	9.8
Post-operative	No	976	72.7
Post-operative	Yes	366	27.3
IABP use	No	1104	82.3
IABP use	Yes	238	17.7
Extracorporeal CPR	No	819	61.0
Extracorporeal CPR	Yes	523	39.0
Infection before ECMO		950	70.8
Infection before ECMO		392	29.2
Pulmonary emboli		1336	99.6
Pulmonary emboli		6	0.4
Dialysis before ECMO		1193	88.9
Dialysis before ECMO		149	11.1
LV ejection fraction	Missing	728	54.2
	< 55%	438	32.6
	≥ 55%	176	13.1
Central venous pressure	Missing	399	29.7
	≤ 12 mmHg	409	30.5
	> 12 mmHg	534	39.8
Bilirubin	Missing	307	22.9
	0–2	712	53.1
	2–5	226	16.8
	> 5	97	7.2
Blood urine nitrogen	Missing	208	15.5
	0–20	323	24.1
	20–50	550	41.0
	> 50	261	19.4
Lactate	Missing	274	20.4
	0–2	156	11.6
	2–10	532	39.6
	> 10	380	28.3
Prothrombin time	Missing	361	26.9
	0–2	873	65.1
	> 2	108	8.0
Creatine kinase	Missing	478	35.6
	0–200	347	25.9
	200–1000	318	23.7
	> 1000	199	14.8
Aspartate aminotransferase	Missing	413	30.8
	0–45	294	21.9
	45–135	286	21.3
	> 135	349	26.0
Creatine kinase MB form	Missing	507	37.8
	0–23	276	20.6
	23–69	279	20.8
	> 69	280	20.9
Troponin I	Missing	677	50.4
	0–23	564	42.0
	23–69	51	3.8
	69	50	3.7
Charlson Comorbidity Index	Missing	437	32.6
	0–14	544	40.5
	15–22	325	24.2
	22–47	36	2.7
APACHE Score	Missing	344	25.6
	0–14	304	22.7
	15–22	339	25.3
	22–47	355	26.5
SOFA Score	Missing	501	37.3
	1–9	596	44.4
	10–13	244	18.2
	14–24	1	0.1
LODS	Missing	522	38.9
	1–7	222	16.5
	8–11	341	25.4
	12–20	257	19.2
MODS	Missing	568	42.3
	0–7	260	19.4
	8–10	252	18.8
	11–19	262	19.5
SAPS3	Missing	522	38.9
	24–46	277	20.6
	47–58	287	21.4
	59–98	256	19.1
SAVE	Missing	913	68.0
	Class I	7	0.5
	Class II	52	3.9
	Class III	149	11.1
	Class IV	128	9.5
	Class V	93	6.9
Outcome	Survival to discharge	506	37.7
Outcome	In-hospital death	836	62.3

Charlson: Charlson Comorbidity Index, APACHE: Acute Physiologic Assessment and Chronic Health Evaluation II Scoring System, SOFA: Sequential Organ Failure Assessment Score, LODS: Logistic Organ Dysfunction System, MODS: Multiple Organ Dysfunction, SAPS3: Simplified Acute Physiology Score III, SAVE: The Survival After Veno-arterial ECMO Score. Outcome: the number and percentage of survival to discharge and in-hospital death

Back to article page

ISSN: 2047-783X

Contact us

Submission enquiries: jacinth.kennady@springernature.com
General enquiries: info@biomedcentral.com

European Journal of Medical Research

Contact us