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Table 1 Summary information for patient and institutions by year.

From: Evaluation of an automated safety surveillance system using risk adjusted sequential probability ratio testing

 

2002

2003

2004

2005

2006

2007

Number of Hospitals (count)

13

14

14

14

14

14

Number of Admissions (count)

4604

4393

3986

3885

3684

3396

30-Day Crude Mortality

2.17

2.25

2.01

1.65

1.41

1.47

 

(1.77-2.63)

(1.84-2.74)

(1.60-2.49)

(1.27-2.10)

(1.06-1.85)

(1.09-1.94)

Mean Age in Years (SD)

66.5

66.7

66.9

66.5

66.5

66.0

 

(10.7)

(10.6)

(10.7)

(10.8)

(10.7)

(10.9)

Male

74.5

73.5

74.5

76.4

75.2

75.9

 

(73.2-75.8)

(72.2-74.8)

(73.1-75.9)

(75.1-77.8)

(73.8-76.7)

(74.4-77.3)

Renal Failure

7.3

6.9

5.8

6.4

6.6

7.5

 

(6.6-8.1)

(6.2-7.7)

(5.1-6.6)

(5.6-7.2)

(5.8-7.4)

(6.6-8.4)

Diabetes Mellitus

38.0

38.1

37.0

39.3

39.4

42.6

 

(36.6-39.4)

(36.6-39.5)

(35.5-38.5)

(37.8-40.8)

(37.9-41.0)

(40.9-44.3)

Hypertension

77.0

79.5

82.7

83.9

84.1

83.5

 

(75.7-78.2)

(78.3-80.7)

(81.1-83.5)

(82.7-85.1)

(82.9-85.3)

(82.2-84.8)

Peripheral Vascular Disease

18.0

17.4

17.7

17.4

17.4

17.4

 

(16.9-19.2)

(16.3-18.5)

(16.5-18.9)

(16.3-18.7)

(16.1-18.6)

(16.1-18.7)

Prior CABG Surgery

3.8

3.1

2.6

2.5

1.8

2.1

 

(3.3-4.4)

(2.6-3.7)

(2.1-3.2)

(2.0-3.0)

(1.4-2.3)

(1.6-2.6)

Prior PTCA/PCI

18.6

17.8

19.1

20.2

21.0

21.6

 

(17.5-19.8)

(16.7-18.9)

(17.8-20.3)

(19.0-21.6)

(19.7-22.3)

(20.2-23.0)

Cardiogenic Shock

2.2

1.6

1.1

1.0

0.9

0.8

 

(1.8-2.7)

(1.3-2.0)

(0.8-1.5)

(0.7-1.4)

(0.6-1.2)

(0.5-1.1)

Ejection Fraction

      

   <30% or missing

12.8

12.6

11.8

11.6

10.1

10.4

 

(11.9-13.9)

(11.4-13.4)

(10.8-12.8)

(10.6-12.7)

(9.1-11.1)

(9.5-11.6)

   30 - 39

11.7

12.4

11.0

10.9

10.0

10.5

 

(10.8-12.7)

(11.4-13.4)

(10.1-12.0)

(9.9-11.9)

(9.0-11.0)

(9.5-11.6)

Myocardial Infarction

      

Within 24 Hours

2.7

3.2

3.8

2.9

3.3

3.3

 

(2.3-3.2)

(2.6-3.7)

(3.3-4.5)

(2.4-3.5)

(2.7-3.9)

(2.7-4.0)

   1 - 7 days

20.7

23.0

22.1

23.1

23.4

24.5

 

(19.5-21.9)

(21.7-24.2)

(20.8-23.4)

(21.8-24.4)

(22.0-24.8)

(23.1-26.0)

Status of CABG Surgery

      

   Urgent

62.0

65.8

66.6

61.3

59.6

62.3

 

(60.1-63.4)

(64.3-37.2)

(65.1-68.0)

(59.8-62.8)

(58.0-61.2)

(60.7-64.0)

   Emergent/Salvage

3.7

2.9

3.1

2.5

2.6

3.3

 

((3.2-4.3)

(2.4-3.4)

(2.6-3.7)

(2.0-3.0)

(2.1-3.1)

(2.7-3.9)

Pre-op Intra-Aortic Balloon Pump

9.3

11.7

11.6

10.9

11.2

11.3

 

(8.5-10.2)

(10.7-12.6)

(10.6-12.6)

(9.9-11.9)

(10.2-12.3)

(10.2-12.4)

  1. Years 2002-2005 were collected in the calendar year, and 2006-2007 were collected in the fiscal year from October of the previous year to September of the reported year. All data are percents (with 95% confidence intervals) unless otherwise specified as means (with standard deviations).
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BMC Medical Informatics and Decision Making

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