Research Article

Lactate and Bilirubin Index: A New Indicator to Predict Critically Ill Cirrhotic Patients’ Prognosis

Table 1

Characteristics of the study population, stratified by survival.

ParameterAll patients (n = 479)Survivors (n = 321)Nonsurvivors (n = 158) value

Age (years)55.6 (48.9–64.8)55.8 (48.3–65.2)55.2 (49.9–64.3)0.710
Sex: male315 (65.8)213 (66.4)102 (64.6)0.697
Weight (kg)85.3 (70.9–99.0)85.3 (70.5–97.5)85.0 (71.2–100.0)0.660

Ethnicity
White350 (73.1)241 (75.1)109 (69.0)0.041
Black31 (6.5)24 (7.5)7 (4.4)
Others98 (20.5)56 (17.4)42 (26.6)

Causes of cirrhosis
Alcoholic264 (55.1)167 (52.0)97 (61.4)0.053
Hepatitis B12 (2.5)5 (1.6)7 (4.4)0.059
Hepatitis C119 (24.8)77 (24.0)42 (26.6)0.537
Biliary9 (1.9)0 (0.0)9 (5.7)0.034
Autoimmune5 (1.0)3 (0.9)2 (1.3)0.667
Others136 (28.4)103 (32.1)33 (20.9)0.011

Primary cause of ICU admission
Infection/sepsis132 (27.6)93 (29.0)39 (24.7)0.323
Bleeding107 (22.3)79 (24.6)28 (17.7)0.089
Respiratory17 (3.5)12 (3.7)5 (3.2)0.750
Cardiovascular56 (11.7)42 (13.1)14 (8.9)0.176
Renal failure25 (5.2)12 (3.7)13 (8.2)0.038
Neurological failure49 (10.2)31 (9.7)18 (11.4)0.556
Others93 (19.4)52 (16.2)41 (25.9)0.011

Comorbidity
Hypertension122 (25.5)80 (24.9)42 (26.6)0.695
Diabetes124 (25.9)85 (26.5)39 (24.7)0.673

Vital signs
Temperature (°C)36.7 (36.3–37.2)36.8 (36.4–37.3)36.4 (36.0–37.0)<0.001
Heart rate90.4 (78.7–103.2)88.6 (76.8–101.1)94.2 (81.1–105.4)0.021
MAP (mmHg)73.1 (67.9–80.7)74.8 (69.4–82.5)70.0 (64.4–75.6)<0.001
Respiratory rate18.9 (16.1–22.1)18.3 (15.9–21.0)20.2 (17.3–23.7)<0.001
SpO2/FiO2185.2 (173.1–457.0)204.6 (175.2–458.1)175.8 (169.4–455.8)<0.001
24-h urine output (mL)1151 (572–1915)1360 (787–2028)653 (222–1280)<0.001
Mechanical ventilation duration (hours)36.0 (0.0–120.5)19.0 (0.0–112.5)60.1 (12.0–146.5)<0.001
Length of ICU stay (days)4.0 (2.4–8.5)3.8 (2.3–8.0)4.7 (2.8–9.0)0.147

Values are expressed as n (%) or median (IQR). ICU: intensive care unit; MAP: mean arterial pressure; SpO2: peripheral oxygen saturation; FiO2: fraction of inspired oxygen.