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Table 1 Features (units of measurement and percentage of patients with that feature recorded) for training (and validation) datasets.

From: A clinical prediction model to identify patients at high risk of hemodynamic instability in the pediatric intensive care unit

Arterial blood gas

Invasive vitals

Arterial pH

 

63 (92)

Invasive mean blood pressure (iMBP)

mmHg

51 (1)

Bicarbonate (HCO3)

mEq

63 (84)

Invasive systolic blood pressure (iSBP)

mmHg

51 (1)

Arterial PaCO2

mmHg

63 (92)

Invasive diastolic blood pressure (iDBP)

mmHg

51 (1)

SaO2

%

63 (79)

   

Arterial base excess (aBE)

mEq/L

63 (91)

   

Arterial PaO 2

mmHg

63 (92)

   

Ventilator parameters

Noninvasive vitals/demographics

PF ratio

 

41 (26)

Noninvasive mean blood pressure (nMBP)

qmmHg

98 (100)

FiO 2

%

76 (89)

Noninvasive systolic blood pressure (nSBP)

qmmHg

98 (100)

Mean airway pressure

cmH2O

35 (66)

Noninvasive diastolic blood pressure (nDBP)

mmHg98(100)

 
   

Heart rate (HR)

bpm

100 (100)

   

Respiratory rate (RR)

bpm

99 (96)

   

SpO 2

%

61 (68)

   

Age

years

100 (100)

   

Temperature (T)

Celsius

99 (99)

Basic metabolic panel

Comprehensive metabolic panel

Glucose

mg/dl

74 (91)

Alanine aminotransferase (ALT)

U/L

18 (77)

Chloride

mEq/L

72 (91)

Albumin

g/dl

18 (81)

Blood urea nitrogen (BUN)

mg/dl

66 (84)

Total protein

g/dl

18 (81)

Creatinine

mg/dl

66 (84)

   

Potassium

mEq/L

78 (91)

   

Sodium

mEq/L

77 (93)

   

Complete blood count

WBC – leukocytes

K/μl

65 (43)

RBC

M/μl

65 (12)

Hemoglobin

g/dl

68 (52)

Platelets

K/μl

65 (41)

Additional tests

Magnesium

mg/dl

26 (70)

Prothrombin time (INR)

seconds

37 (29)

Lactic acid

mg/dl

14 (45)

Urine output

cm3/kg/hour

77 (72)

  1. All 36 features were input to the AdaBoost-abstain classifier to classify hemodynamic instability. Among the 36 features, only 21 (highlighted in bold) were selected by the model
  2. RBC red blood cells, WBC white blood cells