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Table 3 Prognostic risk of in-hospital death, by calendar period of surgery and type of access

From: Evaluation of supply-side initiatives to improve access to coronary bypass surgery

Calendar period of surgery

  

Risk , %

   

Access type

<1.0

1.0–3.0

>3.0

p value

1992–1993

      

<0.001

 Wait-listed

808

(58.4)

555

(40.1)

20

(1.4)

 Direct admission

559

(46.2)

581

(48.0)

70

(5.8)

1994–1995

      

<0.001

 Wait-listed

920

(61.3)

549

(36.6)

32

(2.1)

 Direct admission

694

(46.9)

673

(45.5)

112

(7.6)

1996–1997

      

<0.001

 Wait-listed

929

(58.2)

625

(39.2)

41

(2.6)

 Direct admission

761

(46.9)

776

(47.9)

84

(5.2)

1998–1999

      

<0.001

 Wait-listed

829

(52.9)

675

(43.1)

62

(4.0)

 Direct admission

867

(41.2)

984

(46.8)

251

(11.9)

2000–2001

      

<0.001

 Wait-listed

525

(37.6)

724

(51.8)

148

(10.6)

 Direct admission

413

(19.4)

1119

(52.6)

594

(27.9)

2002–2003

      

<0.001

 Wait-listed

691

(40.6)

876

(51.4)

136

(8.0)

 Direct admission

458

(23.6)

1037

(53.5)

444

(22.9)

2004–2005

      

<0.001

 Wait-listed

489

(37.6)

692

(53.2)

119

(9.2)

 Direct admission

461

(19.3)

1242

(52.1)

683

(28.6)

  1. *Based on Northern New England Cardiovascular Disease Study Group [22].
  2. Compares the distribution of risk between wait-listed patients and direct admissions for each period.