Table 1 Baseline characteristics between development group and internal validation group.

From: Development and validation of a mortality predictive model for ICU patients with primary pulmonary hypertension

Variables

Development group

Internal validation group

t/Z/x2

P

(n = 260)

(n = 104)

Demographics

 Age (year), M (Q1, Q3)

73.00 (57.90, 82.12)

72.41 (60.00, 81.67)

0.39

0.700

 Male, n (%)

128 (49.23%)

49 (47.12%)

0.13

0.715

Race, n (%)

  

1.33

0.514

 White

165 (63.46)

66 (63.46)

  

 Black

30 (11.54)

16 (15.38)

  

 Other

65 (25.00)

22 (21.15)

  

Vital signs

 HR (beats/min), M (Q1, Q3)

87.00 (76.00, 100.00)

85.00 (73.75, 99.25)

0.38

0.704

 RR (times/min), M (Q1, Q3)

18.00 (14.00, 22.00)

17.00 (14.00, 22.00)

– 0.38

0.705

 SpO2 (%), M (Q1, Q3)

98.00 (95.00, 100.00)

98.00 (96.00, 100.00)

– 0.85

0.397

 Temperature (°C), M (Q1, Q3)

36.39 (35.90, 36.89)

36.39 (35.90, 36.89)

– 0.17

0.866

 SBP (mmHg), M (Q1, Q3)

121.00 (105.00, 136.00)

118.00 (103.75, 133.25)

– 1.01

0.313

 DBP (mmHg), Mean ± SD

62.86 ± 15.26

60.25 ± 14.76

– 1.49

0.137

0.165

 MBP(mmHg), M (Q1, Q3)

80.83 (69.92, 89.62)

77.17 (68.00, 88.00)

– 1.39

 

Laboratory events

 WBC (109/L), M (Q1, Q3)

10.00 (7.50, 14.12)

10.70 (7.90, 14.05)

– 0.54

0.588

 Hemoglobin (g/dL), M (Q1, Q3)

10.50 (9.17, 12.10)

10.35 (9.60, 12.03)

– 0.09

0.927

 Platelets (109/L), M (Q1, Q3)

185.50 (134.00, 247.00)

213.00 (133.75, 250.00)

– 1.31

0.191

 RDW (%),M (Q1, Q3)

14.80 (13.70, 16.50)

14.80 (13.70, 16.02)

– 0.09

0.931

 BUN (mg/dL), M (Q1, Q3)

23.00 (16.00, 41.00)

28.50 (17.75, 43.00)

– 1.48

0.138

 Creatinine (mg/dL), M (Q1, Q3)

1.10 (0.80, 1.70)

1.20 (0.90, 1.70)

– 0.78

0.436

 Glucose (mg/dL), M (Q1, Q3)

127.50 (104.00, 167.25)

121.00 (102.75, 161.00)

– 0.94

0.345

 Potassium (mmol/L), M (Q1, Q3)

4.25 (3.80, 4.70)

4.20 (3.90, 4.70)

– 0.06

0.951

 Sodium (mmol/L), M (Q1, Q3)

139.00 (136.00, 141.00)

138.50 (135.00, 141.00)

– 0.90

0.366

Comorbidities

 Coronary Artery Disease, n (%)

118 (45.38)

47 (45.19)

0.00

0.973

 Diabetes Mellitus, n (%)

64 (24.62)

20 (19.23)

1.21

0.271

 Hypertension, n (%)

92 (35.38)

38 (36.54)

0.04

0.836

 Atrial Fibrillation, n (%)

103 (39.62)

36 (34.62)

0.79

0.375

Scores

 SOFA, M (Q1, Q3)

3.50 (2.00, 6.00)

4.00 (2.00, 6.00)

– 0.52

0.605

 SAPS II, M (Q1, Q3)

36.00 (27.00, 44.25)

39.00 (30.00, 8.25)

– 2.10

0.035

  1. Values are presented as the mean ± standard deviation, median (interquartile range), or number of patients (%).
  2. HR heart rate, RR respiratory rate, SpO2 percutaneous oxygen saturation, SBP systolic blood pressure, DBP diastolic blood pressure, MAP mean arterial pressure, WBC white blood cell, RDW red cell distribution width, BUN blood urea nitrogen, SOFA sequential organ failure assessment, SAPS II simplified acute physiology score II.
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