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Table 1 Comparison of training and validation dataset and outcomes of emergency triage dataset (n = 97,333)

From: Prediction of major adverse cardiac events in the emergency department using an artificial neural network with a systematic grid search

 

Training data

Validation data

Total

 

[n = 77,866]

[n = 19,467]

[n = 97,333]

 Age in (years)

54.04 (± 19.20)

54.23 (± 19.11)

54.08 (± 19.18)

 ED triage to admission time

7.87 (± 4.37)

7.86 (± 4.36)

7.87 (± 4.37)

 ED triage to ED discharge time

8.97 (± 4.38)

8.96 (± 4.36)

8.97 (± 4.37)

Triage vitals

 SBP (mmHg)

133.45 (± 21.97)

133.32 (± 21.9)

133.43 (± 21.95)

 DBP (mmHg)

76.86 (± 14.36)

76.61 (± 14.38)

76.81 (± 14.36)

 RR (breaths/min)

24.58 (± 7.87)

24.65 (± 7.9)

24.59 (± 7.88)

 Temperature (0C)

37.32 (± 0.78)

37.32 (± 0.77)

37.32 (± 0.78)

 Oxygen saturation (%)

94.46 (± 7.46)

93.95 (± 6.56)

94.44 (± 5.48)

 Heart rate (BPM)

102.18 (± 23.13)

102 (± 23.08)

102.14 (± 23.12)

Gender

 Male

41,402 (53.2%)

10,298 (52.9%)

51,700 (53.1%)

 Female

36,464 (46.8%)

9169 (47.1%)

45,633 (46.9%)

Triage category

 P1

23,968 (30.8%)

6069 (31.2%)

30,037 (30.9%)

 P2

27,257 (35%)

6729 (34.6%)

33,986 (34.9%)

 P3

24,331 (31.2%)

6080 (31.2%)

30,411 (31.2%)

 P4

1337 (1.7%)

351 (1.8%)

1688 (1.7%)

 P5

973 (1.2%)

238 (1.2%)

1211 (1.2%)

Risk stratification

   

 Low risk (P1 and P2)

26,624 (34.2%)

6666 (34.2%)

33,290 (34.2%)

 High risk (P3, P4, and P5)

51,242 (65.8%)

12,801 (65.8%)

64,043 (65.8%)

Seasons

   

 Winter (December, January, and February)

27,650 (35.5%)

7029 (36.1%)

34,679 (35.6%)

 Summer (April, May, and June)

30,881 (39.7%)

7628 (39.2%)

38,509 (39.6%)

Weeks

 Weekend

22,783 (29.3%)

5657 (29.1%)

28,440 (29.2%)

 Weekday

55,083 (70.7%)

13,810 (70.9%)

68,893 (70.8%)

Comorbid

   

 Diabetes mellitus

14,732 (18.9%)

3727 (19.1%)

18,459 (19%)

 Hypertension

18,363 (23.6%)

4648 (23.9%)

23,011 (23.6%)

 Ischemic heart disease

4559 (5.9%)

1118 (5.7%)

5677 (5.8%)

Triage presenting complaints/diagnosis

 Shortness of breath

18,298 (23.5%)

4583 (23.5%)

22,881 (23.5%)

 Sepsis

3383 (4.3%)

844 (4.3%)

4227 (4.3%)

 Chest pain

6786 (8.7%)

1689 (8.7%)

8475 (8.7%)

 Sweating

535 (0.7%)

124 (0.6%)

659 (0.7%)

 Tachycardia

1546 (2%)

397 (2%)

1943 (2%)

 Weakness

6640 (8.5%)

1678 (8.6%)

8318 (8.5%)

 COVID-19

4413 (5.7%)

1100 (5.7%)

5513 (5.7%)

 Shoulder pain

4 (0%)

3 (0%)

7 (0%)

 Epigastric pain

113 (0.1%)

29 (0.1%)

142 (0.1%)

Cardiac parameters

 Complete heart block

127 (0.2%)

45 (0.2%)

172 (0.2%)

 STEMI

4946 (6.4%)

1283 (6.6%)

6229 (6.4%)

 NSTEMI

4544 (5.8%)

1083 (5.6%)

5627 (5.8%)

 Unstable angina

142 (0.2%)

38 (0.2%)

180 (0.2%)

 Heart failure

934 (1.2%)

237 (1.2%)

1171 (1.2%)

 Cardiogenic shock

3834 (4.9%)

976 (5%)

4810 (4.9%)

 Syncope

336 (0.4%)

88 (0.5%)

424 (0.4%)

 Atrial fibrillation

613 (0.8%)

169 (0.9%)

782 (0.8%)

 Acute pulmonary edema

1600 (2.1%)

393 (2%)

1993 (2%)

 Fluid overload

1402 (1.8%)

381 (2%)

1783 (1.8%)

 Hypertrophy

7 (0%)

3 (0%)

10 (0%)

 Cardiac tamponade

10 (0%)

2 (0%)

12 (0%)

Mortality

 Alive

69,191 (88.9%)

17,254 (88.6%)

86,445 (88.8%)

 Death

8675 (11.1%)

2213 (11.4%)

10,888 (11.2%)

 Cardiac arrest

4396 (5.6%)

1087 (5.6%)

5483 (5.6%)