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Table 2 Characteristics of 7316 wait-listed patients who underwent isolated coronary artery bypass surgery in British Columbia 1991–2001.

From: Delay in admission for elective coronary-artery bypass grafting is associated with increased in-hospital mortality

Characteristic Early surgery, N (%) Late surgery, N (%)
Age group (yr)   
   40–49 223 (8.3) 375 (8.1)
   50–59 552 (20.6) 1075 (23.2)
   60–69 1021 (38.2) 1772 (38.2)
   70–79 830 (31.0) 1348 (29.0)
   80 and over 49 (1.8) 71 (1.5)
Sex   
   Female 482 (18.0) 791 (17.0)
   Male 2193 (82.0) 3850 (83.0)
Urgency at registration   
   Semi-urgent 2107 (78.8) 3685 (79.4)
   Non-urgent 568 (21.2) 956 (20.6)
Comorbidity at registration   
   Major conditions* 603 (22.5) 926 (20.0)
   Other conditions† 785 (29.3) 1096 (23.6)
   None 1287 (48.1) 2619 (56.4)
Affected anatomy   
   Left main 403 (15.1) 505 (10.9)
   Multi-vessel‡ 2054 (76.8) 3809 (82.1)
   Limited§ 218 (8.1) 327 (7.0)
Period of registration   
   1991–1992 633 (23.7) 710 (15.3)
   1993–1994 687 (25.7) 851 (18.3)
   1995–1996 354 (13.2) 1122 (24.2)
   1997–1998 450 (16.8) 1058 (22.8)
   1999–2000 551 (20.6) 900 (19.4)
Hospital   
   1 662 (24.7) 831 (17.9)
   2 1004 (37.5) 1507 (32.5)
   3 390 (14.6) 1270 (27.4)
   4 619 (23.1) 1033 (22.3)
Mode of admission   
   Elective 2524 (94.4) 4526 (97.5)
   Unplanned emergency 151 (5.6) 115 (2.5)
  1. * Congestive heart failure, diabetes mellitus, chronic obstructive pulmonary disease, cancer, or rheumatoid arthritis.
  2. †Peripheral vascular disease, cerebrovascular disease, dementia, peptic ulcer disease, hemiplegia, renal disease, or liver disease.
  3. ‡Three- or two-vessel disease with stenosis of the proximal left anterior descending artery.
  4. §Two-vessel disease with no lesion in the proximal left anterior descending artery or single-vessel disease with stenosis of the proximal left anterior descending artery.