Survival Prediction in Patients with Hypertensive Chronic Kidney Disease in Intensive Care Unit: A Retrospective Analysis Based on the MIMIC-III Database

Table 2

Features selection (univariate and multivariate analyses).

Variable		Univariate analysis		Multivariate analysis
		HR (95% CI)		HR (95% CI)
Insurance	Medicare (ref)
	Private	0.59 (0.48-0.73)	<0.0001	0.57 (0.46-0.70)	<0.0001
	Other	0.49 (0.36-0.68)	<0.0001	0.44 (0.32-0.61)	<0.0001
Married (no)		1.18 (1.01-1.37)	0.0373
Ethnicity	White (ref)
	Black	0.75 (0.60-0.93)	0.0080
	Other	0.85 (0.63-1.14)	0.2740
Gender (female)		0.87 (0.74-1.02)	0.0775
WBC (K/μL)		1.01 (1.00-1.02)	0.1420
Creatinine		1.01 (0.98-1.03)	0.6770
PCO2		1.00 (1.00-1.01)	0.7550
PH		0.89 (0.45-1.74)	0.7230
PO2		1.00 (1.00-1.00)	0.1680
Albumin (g/dL)		0.79 (0.70-0.89)	<0.0001	0.86 (0.76-0.98)	0.0252
Alkaline phosphatase (IU/L)		1.00 (1.00-1.00)	0.0003	1.00 (1.00-1.00)	0.0059
Anion gap (mEq/L)		1.00 (0.98-1.01)	0.7790
Bicarbonate (mEq/L)		0.99 (0.98-1.01)	0.2760
Bilirubin Total (mg/dL)		1.01 (0.98-1.04)	0.4780
CK (IU/L)		1.00 (1.00-1.00)	0.1500
Glucose (mg/dL)		1.00 (1.00-1.00)	0.2580
LD (IU/L)		1.00 (1.00-1.00)	0.4240
Magnesium (mg/dL)		1.14 (0.96-1.36)	0.1330
MCH (pg)		1.01 (0.99-1.04)	0.3020
MCHC		0.92 (0.87-0.96)	0.0002	0.95 (0.9-1.00)	0.0471
MCV (f/L)		1.02 (1.01-1.03)	0.0008	1.02 (1.01-1.03)	0.0010
Monocytes		1.00 (0.97-1.02)	0.8530
Neutrophils		1.01 (1.00-1.01)	0.0100
Platelet count (K/μL)		1.00 (1.00-1.00)	0.3570
PT		1.01 (1.00-1.02)	0.0100
RBC (m/μL)		0.83 (0.75-0.92)	0.0002
Coronary angiogram (yes)		0.69 (0.55-0.86)	0.0008	0.79 (0.63-0.99)	0.0406
Acute renal failure (yes)		1.31 (1.12-1.54)	0.0006	1.26 (1.07-1.48)	0.0058
Infection (yes)		1.19 (0.98-1.44)	0.0760
Blood (urine)	Negative (ref)
	Small	1.13 (0.87-1.47)	0.3480
	Moderate	1.29 (1.00-1.65)	0.0510
	Large	1.11 (0.93-1.33)	0.2350
	Negative (ref)
Bilirubin	Small	1.27 (0.99-1.62)	0.0574
	Moderate	1.61 (0.80-3.24)	0.1820
	Large	1.16 (0.60-2.25)	0.6550
Kidney surgery (yes)		0.37 (0.32-0.43)	<0.0001	0.40 (0.34-0.47)	<0.0001
Diabetes (yes)		0.88 (0.76-1.03)	0.1170
Hyperlipemia (yes)		0.58 (0.50-0.68)	<0.0001	0.74 (0.63-0.87)	0.0003
Dilantin (yes)		1.35 (0.99-1.85)	0.0600
Digoxin (yes)		1.79 (1.40-2.29)	<0.0001	1.32 (1.03-1.69)	0.0029
Vancomycin (yes)		1.66 (1.42-1.94)	<0.0001
Tylenol (yes)		0.81 (0.57-1.14)	0.2190