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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.