Table 1 Characteristics of geriatric patients experiencing AMI and patients without AMI

Age, years

76.7 ± 6.9

73.9 ± 6.6

< 0.001

Male, n (%)

112 (62.1)

2847 (57.5)

0.001

 Smoking

67 (42.1)

2618 (52.9)

0.012

 Preexisting coronary artery disease

67 (42.1)

877 (17.7)

< 0.001

 COPD

26 (16.4)

667 (13.5)

0.906

 Lung cancer

16 (10.1)

463 (9.3)

0.782

 Diabetes

65 (40.9)

1031 (20.8)

< 0.001

 Hypertension

99 (62.3)

2409 (48.6)

0.001

 Hypercholesterolemia

29 (18.2)

432 (8.7)

< 0.001

 Chronic heart failure

6 (3.8)

40 (0.8)

0.003

 Cerebrovascular disease

22 (13.8)

327 (6.6)

0.001

 Chronic renal failure

6 (3.8)

85 (1.7)

0.063

 Chronic liver disease

6 (3.8)

145 (2.9)

0.474

 Fever

95 (59.7)

3170 (64.0)

0.276

 Cough and expectoration

79 (49.7)

2362 (47.7)

0.629

 Chest pain

13 (8.2)

222 (4.5)

0.030

 Dyspnea

42 (26.4)

693 (13.9)

< 0.001

 Duration of symptoms

6.9 ± 6.7

7.17 ± 7.0

0.927

 NIV/IMV

17 (10.7)

155 (3.1)

< 0.001

 Respiratory failure

41 (25.8)

776 (15.7)

0.001

 Impaired consciousness

3 (1.9)

40 (0.8)

0.150

 Respiratory rate ≥ 30/min

4 (2.5)

55 (1.1)

0.110

 SBP < 90 mmHg or DBP ≤ 60 mmHg

19 (11.9)

12 (0.2)

< 0.001

 T < 36 °C or ≥ 40 °C

2 (1.3)

4 (0.1)

0.003

 Heart rate ≥ 125 bpm.

2 (1.3)

45 (0.9)

< 0.001

 BUN ≥7 mmol/L

95 (59.7)

1412 (28.5)

< 0.001

 WBC < 4.0 × 10⁹/L or ≥ 10.0 × 10⁹/L

71 (44.7)

2319 (46.8)

0.323

 PLT < 10.0 × 10⁹/L

14 (8.8)

7 (0.1)

< 0.001

 PH < 7.35

15 (9.4)

447 (9.0)

0.471

 Serum sodium < 130 mmol/L

50 (31.4)

903 (18.2)

< 0.001

 HCT < 30%

21 (13.2)

491 (9.9)

0.112

 Blood glucose ≥14 mmol/L

11 (6.9)

74 (1.5)

< 0.001

 Pleural effusion

122 (76.7)

4089 (82.6)

0.071

 Bacterial pneumonia

126 (79.2)

4011 (81.0)

0.952

 Viral pneumonia

3 (1.9)

64 (1.3)

0.465

 Fungal pneumonia

8 (5.0)

140 (2.8)

0.140

Death in hospital, n (%)

16 (10.1)

118 (2.4)

< 0.001

Length of stay, days

13.8 ± 8.9

12.1 ± 9.8

0.023