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Table 1 Distribution of demographic characteristics, chronic conditions, clinical variables and drug prescriptions

From: Using clinical variables and drug prescription data to control for confounding in outcome comparisons between hospitals

Risk factor

AMI

HF

(No. 7613)

(No. 6348)

No.

%

No.

%

Demographic characteristics

    

Age (mean, SD)

70.1*

13.5*

83.0*

7.1*

Gender (female)

2690

35.3

4925

77.58

Previous conditions (from HIS)

    

Cancer

437

5.74

  

Diabetes

829

10.89

406

6.4

Nutritional deficiencies

  

18

0.28

Lipid metabolism disorders

344

4.52

  

Obesity

74

0.97

23

0.36

Blood disorders

338

4.44

322

5.07

Dementia including Alzheimer’s disease

  

192

3.02

Parkinson’s disease

  

56

0.88

Hemiplegia and other paralytic syndromes

  

22

0.35

Rheumatic heart disease

67

0.88

30

0.47

Hypertension

1382

18.15

877

13.82

Previous myocardial infarction

1137

14.93

163

2.57

Other forms of ischemic heart diseases

998

13.11

560

8.82

Acute endocarditis and myocarditis

2

0.03

  

Cardiomyopathy

95

1.25

50

0.79

Conduction disorders and arrhythmias

592

7.78

479

7.55

Heart failure

554

7.28

356

5.61

Ill-defined descriptions or complications of heart disease

137

1.8

117

1.84

Other heart conditions

103

1.35

82

1.29

Cerebrovascular disease

512

6.73

561

8.84

Vascular disease

304

3.99

154

2.43

Chronic obstructive pulmonary disease (COPD)

423

5.56

366

5.77

Chronic diseases (liver, pancreas, intestine)

85

1.12

71

1.12

Chronic renal disease

419

5.5

232

3.65

Rheumatoid arthritis and other inflammatory polyarthropathies

  

25

0.39

Osteoporosis and other disorders of bone and cartilage

  

57

0.9

Previous coronary artery bypass graft

310

4.07

  

Previous coronary angioplasty

854

11.22

  

Cerebral revascularisation procedures

42

0.55

  

Other cardiac operations

47

0.62

  

Other vascular operations

182

2.39

  

Clinical data (from the New Information System)

    

Systolic blood pressure

    

  ≤ 100 mmHg

765

10.05

  

 >> 100 mmHg

6592

86.59

  

  Missing

256

3.36

  

International Normalised Ratio (INR)

    

  0.9-1.2

  

4,834

76.15

  Out of range

  

855

13.47

  Missing

  

659

10.38

Drug prescriptionsa

    

Anticoagulants

493

6.48

  

Antiplatelet agents

2447

32.14

  

Cardiac therapy drugs

1686

22.15

  

Antihypertensive drugs

359

4.72

  

Diuretics

1577

20.71

  

Beta-blocking agents

1554

20.41

  

Calcium channel blockers

1570

20.62

  

ACE inhibitors

1977

25.97

  

Angiotensin II antagonists

1823

23.95

  

Statins

1885

24.76

  

Other lipid-modifying agents

557

7.32

  

Anti-diabetic drugs

1614

21.2

  

Antiplatelet (3 months)

  

851

13.41

Anticoagulants (3 months)

  

238

3.75

  1. *Mean and standard deviation.
  2. aTreatment was defined as at least 1 prescription in the 3 months preceding the AMI/HF admission.