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Table 2 Characteristics of patients in the study cohort by access to surgery after registration for CABG (as number and percentages across each characteristic)

From: Survival benefit of coronary-artery bypass grafting accounted for deaths in those who remained untreated

   Access to surgery, % in each category
Characteristic % of
all patients
(N = 8220)
Unplanned
emergency
(N = 266)
Elective within
target time
(N = 2524)
Elective after
target time
(N = 4526)
Remained
untreated
(N = 904)
Age      
   < 50 yr 666 (8.1) 19 (2.9) 209 (31.4) 370 (55.6) 68 (10.2)
   50–59 yr 1814 (22.1) 55 (3.0) 518 (28.6) 1054 (58.1) 187 (10.3)
   60–69 yr 3125 (38.0) 104 (3.3) 962 (30.8) 1727 (55.3) 332 (10.6)
   70–79 yr 2457 (29.9) 84 (3.4) 787 (32.0) 1307 (53.2) 279 (11.4)
   ≥ 80 yr 158 (1.9) 4 (2.5) 48 (30.4) 68 (43.0) 38 (24.1)
Sex      
   Female 1453 (17.7) 62 (4.3) 440 (30.3) 771 (53.1) 180 (12.4)
   Male 6767 (82.3) 204 (3.0) 2084 (30.8) 3755 (55.5) 724 (10.7)
Urgency group      
   Semi-urgent 6333 (77.0) 207 (3.3) 1986 (31.4) 3599 (56.8) 541 (8.5)
   Non-urgent 1887 (23.0) 59 (3.1) 538 (28.5) 927 (49.1) 363 (19.2)
Comorbidity      
   Major conditions* 1756 (21.4) 68 (3.9) 564 (32.1) 897 (51.1) 227 (12.9)
   Other conditions 2113 (25.7) 79 (3.7) 735 (34.8) 1067 (50.5) 232 (11.0)
   None 4351 (52.9) 119 (2.7) 1225 (28.2) 2562 (58.9) 445 (10.2)
Coronary anatomy      
   Left main 983 (12.0) 26 (2.6) 389 (39.6) 493 (50.2) 75 (7.6)
   Multi-vessel 6583 (80.1) 213 (3.2) 1932 (29.3) 3718 (56.5) 720 (10.9)
   Limited§ 654 (8.0) 27 (4.1) 203 (31.0) 315 (48.2) 109 (16.7)
Period      
   1991–1992 1507 (18.3) 50 (3.3) 596 (39.5) 697 (46.3) 164 (10.9)
   1993–1994 1716 (20.9) 51 (3.0) 654 (38.1) 833 (48.5) 178 (10.4)
   1995–1996 1663 (20.2) 53 (3.2) 333 (20.0) 1090 (65.5) 187 (11.2)
   1997–1998 1714 (20.9) 65 (3.8) 422 (24.6) 1021 (59.6) 206 (12.0)
   1999–2000 1620 (19.7) 47 (2.9) 519 (32.0) 885 (54.6) 169 (10.4)
Hospital      
   1 1706 (20.8) 65 (3.8) 616 (36.1) 812 (47.6) 213 (12.5)
   2 2759 (33.6) 74 (2.7) 964 (34.9) 1473 (53.4) 248 (9.0)
   3 2013 (24.5) 58 (2.9) 372 (18.5) 1230 (61.1) 353 (17.5)
   4 1742 (21.2) 69 (4.0) 572 (32.8) 1011 (58.0) 90 (5.2)
  1. *Congestive heart failure, diabetes mellitus, chronic obstructive pulmonary disease, rheumatoid arthritis, cancer.
  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 1-vessel disease with stenosis of the proximal left anterior descending artery.
  5. Target Time = Recommended time