Preoperative platelet count, preoperative hemoglobin concentration and deep hypothermic circulatory arrest duration are risk factors for acute kidney injury after pulmonary endarterectomy: a retrospective cohort study

Table 4 Relationship of AKI with length of stay, ventilation time and mortality. (n = 123)

Variables	No AKI	Stage
Variables	No AKI	1	2	3
Hospital length of day (d)	12 (9,17.5)	12 (10,15.5)	18.5 (13.25,24) ^*	26 (21,30) ^*
Intensive care unit stay (d)^#	4 (3, 6)	5 (3.75, 6)	6 (4.5, 16) ^*	20 (9, 27) ^*
Mechanical ventilation time(h)^#	48 (33, 90.5)	67(46, 91)	96 (66, 253) ^*	418 (93, 543) ^*
90-d mortality (n)	0(0.0%)	1(2.7%)	0(0.0%)	1(14.3%)^*

ISSN: 1749-8090