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Table 2 Characteristics of 12,818 direct admissions, who had decision for coronary artery bypass grafting in British Columbia 1992–2005, by calendar period of decision

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

  All periods 1992–1993 1994–1995 1996–1997 1998–1999 2000–2001 2002–2003 2004–2005
Characteristic (n=12818) (n=1204) (n=1474) (n=1621) (n=2089) (n=2121) (n=1940) (n=2369)
Age group at decision (years)
<50 920 (7.2) 111 (9.2) 97 (6.6) 129 (8.0) 142 (6.8) 157 (7.4) 139 (7.2) 145 (6.1)
50–59 2604 (20.3) 228 (18.9) 275 (18.7) 313 (19.3) 435 (20.8) 432 (20.4) 414 (21.3) 507 (21.4)
60–69 4354 (34.0) 442 (36.7) 569 (38.6) 571 (35.2) 715 (34.2) 676 (31.9) 615 (31.7) 766 (32.3)
70–79 4341 (33.9) 389 (32.3) 481 (32.6) 550 (33.9) 726 (34.8) 747 (35.2) 663 (34.2) 785 (33.1)
≥80 599 (4.7) 34 (2.8) 52 (3.5) 58 (3.6) 71 (3.4) 109 (5.1) 109 (5.6) 166 (7.0)
Sex*
Men 10067 (78.5) 914 (75.9) 1104 (74.9) 1247 (76.9) 1659 (79.4) 1687 (79.5) 1525 (78.6) 1931 (81.5)
Women 2750 (21.5) 290 (24.1) 370 (25.1) 374 (23.1) 430 (20.6) 434 (20.5) 415 (21.4) 437 (18.4)
Urgency at decision
Urgent 5944 (46.4) 727 (60.4) 944 (64.0) 900 (55.5) 1046 (50.1) 887 (41.8) 698 (36.0) 742 (31.3)
Semiurgent 6445 (50.3) 453 (37.6) 485 (32.9) 654 (40.3) 906 (43.4) 1148 (54.1) 1211 (62.4) 1588 (67.0)
Nonurgent 429 (3.3) 24 (2.0) 45 (3.1) 67 (4.1) 137 (6.6) 86 (4.1) 31 (1.6) 39 (1.6)
Institution at decision
1 2437 (19.0) 89 (7.4) 206 (14.0) 295 (18.2) 381 (18.2) 473 (22.3) 427 (22.0) 566 (23.9)
2 2962 (23.1) 342 (28.4) 369 (25.0) 333 (20.5) 466 (22.3) 426 (20.1) 457 (23.6) 569 (24.0)
3 4964 (38.7) 417 (34.6) 623 (42.3) 838 (51.7) 870 (41.6) 799 (37.7) 683 (35.2) 734 (31.0)
4 2455 (19.2) 356 (29.6) 276 (18.7) 155 (9.6) 372 (17.8) 423 (19.9) 373 (19.2) 500 (21.1)
Comorbidities at decision
Major conditions 5458 (42.6) 413 (34.3) 552 (37.4) 626 (38.6) 885 (42.4) 949 (44.7) 914 (47.1) 1119 (47.2)
Other conditions 6248 (48.7) 708 (58.8) 809 (54.9) 885 (54.6) 1033 (49.4) 1027 (48.4) 857 (44.2) 929 (39.2)
None 1112 (8.7) 83 (6.9) 113 (7.7) 110 (6.8) 171 (8.2) 145 (6.8) 169 (8.7) 321 (13.6)
Coronary anatomy affected at decision
Left main 3184 (24.8) 282 (23.4) 358 (24.3) 377 (23.3) 466 (22.3) 539 (25.4) 534 (27.5) 628 (26.5)
Multivessel§ 8855 (69.1) 814 (67.6) 1019 (69.1) 1136 (70.1) 1501 (71.9) 1470 (69.3) 1307 (67.4) 1608 (67.9)
Limited 779 (6.1) 108 (9.0) 97 (6.6) 108 (6.7) 122 (5.8) 112 (5.3) 99 (5.1) 133 (5.6)
Time between catheterization and decision for surgical revascularization (weeks)
0–1 8576 (66.9) 885 (73.5) 1021 (69.3) 991 (61.1) 1381 (66.1) 1465 (69.1) 1246 (64.2) 1587 (67.0)
2–3 2232 (17.4) 164 (13.6) 215 (14.6) 326 (20.1) 334 (16.0) 372 (17.5) 406 (20.9) 415 (17.5)
4–5 592 (4.6) 46 (3.8) 54 (3.7) 81 (5.0) 87 (4.2) 85 (4.0) 113 (5.8) 126 (5.3)
6–7 364 (2.8) 25 (2.1) 38 (2.6) 45 (2.8) 76 (3.6) 46 (2.2) 58 (3.0) 76 (3.2)
≥8 1054 (8.2) 84 (7.0) 146 (9.9) 178 (11.0) 211 (10.1) 153 (7.2) 117 (6.0) 165 (7.0)
  1. *1 direct admission with decision date in 2004–2005 had unknown sex.
  2. Congestive heart failure, diabetes mellitus, chronic obstructive pulmonary disease, rheumatoid arthritis, or cancer.
  3. Peripheral vascular disease, cerebrovascular disease, dementia, peptic ulcer disease, hemiplegia, renal disease, or liver disease.
  4. §Two or three-vessel disease with stenosis of the proximal left anterior descending (PLAD) artery.
  5. Two-vessel disease with no stenosis of the PLAD artery or one-vessel disease with stenosis of the PLAD artery.