Table 2 The characteristic of training dataset and test dataset subjects.

From: Development and validation of a prognostic nomogram for Takotsubo syndrome patients in the intensive care units: a retrospective cohort study

Characteristic

Total (n = 368)

Training set (n = 258)

Test set (n = 110)

P value

Age (years old)

66.29 ± 16.09

66.29 ± 16.31

66.27 ± 15.63

0.988

Man

85 (23.10%)

55 (21.31%)

30 (27.30%)

0.269

SBP (mmHg)

112.00 ± 15.25

111.72 ± 15.35

112.67 ± 15.07

0.583

DBP (mmHg)

65.70 ± 10.64

65.75 ± 10.60

65.56 ± 10.80

0.874

MBP (mmHg)

78.65 ± 10.43

78.38 ± 10.39

79.29 ± 10.53

0.448

Heart rate (beats/minute)

91.40 ± 17.08

91.94 ± 16.59

90.12 ± 18.20

0.348

Respiratory rate (beats/minute)

21.03 ± 4.12

21.10 ± 4.24

20.87 ± 3.83

0.627

Temperature (°C)

36.89 ± 0.48

36.88 ± 0.50

36.93 ± 0.41

0.314

SPO2 (%)

96.95 ± 2.35

96.91 ± 2.14

97.04 ± 2.78

0.645

Comorbidities, n (%)

Diabetes

89 (24.18%)

58 (22.48%)

31 (28.19%)

0.300

Hypertension

157 (42.66%)

112 (43.41%)

45 (40.91%)

0.410

myocardial infarction

111 (30.16%)

75 (29.07%)

36 (32.73%)

0.773

congestive heart failure

212 (57.61%)

147 (56.98%)

65 (59.10%)

0.794

Chronic pulmonary disease

99 (26.90%)

73 (28.29%)

26 (23.64%)

0.427

Malignant cancer

55 (14.95%)

41 (15.89%)

14 (12.73%)

0.603

Renal disease

58 (15.76%)

46 (17.83%)

12 (10.91%)

0.131

Laboratory parameters

anion gap (mEq/L)

17.63 ± 5.41

15.75 ± 4.05

16.20 ± 4.40

0.342

BUN (mg/dL)

33.83 ± 24.64

24.47 ± 18.81

23.47 ± 16.12

0.630

Bicarbonate (mmol/L)

20.80 ± 5.18

21.99 ± 4.43

21.84 ± 5.07

0.776

Creatinine (mg/dL)

1.96 ± 1.98

1.24 ± 1.17

1.20 ± 1.51

0.799

Chloride (mmol/L)

103.83 ± 6.66

103.29 ± 6.68

103.64 ± 6.70

0.652

Glucose (mg/dL)

188.89 ± 94.74

149.41 ± 53.65

203.25 ± 109.05

0.384

calcium

8.36 ± 1.19

8.18 ± 0.83

8.26 ± 0.78

0.358

Hematocrit (%)

32.70 ± 6.37

33.33 ± 6.27

33.58 ± 6.52

0.084

Hemoglobin (g/dL)

10.69 ± 2.15

10.58 ± 2.14

10.92 ± 2.16

0.159

WBC (109/L)

13.83 ± 7.74

13.87 ± 7.49

13.73 ± 8.33

0.871

Platelet (109/L)

240.37 ± 139.90

243.91 ± 144.80

232.05 ± 127.92

0.457

Potassium (mmol/L)

4.20 ± 0.63

4.19 ± 0.65

4.21 ± 0.59

0.801

PT

15.91 ± 8.13

15.56 ± 6.72

16.72 ± 10.71

0.210

Sodium (mmol/L)

138.19 ± 5.25

138.00 ± 5.43

138.64 ± 4.80

0.287

Renal replacement therapy, n (%)

18 (4.89%)

14 (5.43%)

4 (3.64%)

0.642

Norepinephrine, n (%)

147 (39.95%)

104 (40.31%)

43 (39.10%)

0.918

Scoring systems

SOFA

5.98 ± 4.00

6.07 ± 4.07

5.78 ± 3.86

0.521

ICU LOS, days

5.82 ± 6.75

5.85 ± 6.78

5.80 ± 6.83

0.944

HOS LOS (days)

17.75 ± 17.91

17.68 ± 17.96

17.68 ± 18.09

0.885

  1. SBP: systolic blood pressure; DBP: diastolic blood pressure; MBP: mean blood pressure; SPO2: pulse oximetry derived oxygen saturation; BUN: blood urea nitrogen; PT: prothrombin time; WBC: white blood cell; SOFA: sequential organ failure assessment; ICU: intensive care unit; HOS: hospital; LOS: length of stay.
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