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Table 3 Characteristics of patients in the study cohort by death after registration for CABG *(as number and percentages within each category for each characteristic)

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

Characteristic On wait lists
(N = 80)
After withdrawal
(N = 141)
During admission
(N = 97)
After discharge
(N = 551)
Age     
   < 50 yr 5 (6.3) 5 (3.5) 2 (2.1) 15 (2.7)
   50–59 yr 17 (21.3) 20 (14.2) 17 (17.5) 73 (13.2)
   60–69 yr 29 (36.3) 38 (27.0) 35 (36.1) 196 (35.6)
   70–79 yr 28 (35.0) 64 (45.4) 41 (42.3) 244 (44.3)
   ≥ 80 yr 1 (1.3) 14 (9.9) 2 (2.1) 23 (4.2)
Sex     
   Female 7 (8.8) 35 (24.8) 25 (25.8) 95 (17.2)
   Male 73 (91.3) 106 (75.2) 72 (74.2) 456 (82.8)
Urgency group     
   Semi-urgent 54 (67.5) 98 (69.5) 86 (88.7) 456 (82.8)
   Non-urgent 26 (32.5) 43 (30.5) 11 (11.3) 95 (17.2)
Comorbidity     
   Major conditions§ 26 (32.5) 53 (37.6) 32 (33.0) 176 (31.9)
   Other conditions|| 20 (25.0) 36 (25.5) 23 (23.7) 130 (23.6)
   None 34 (42.5) 52 (36.9) 42 (43.3) 245 (44.5)
Coronary anatomy     
   Left main 6 (7.5) 13 (9.2) 12 (12.4) 75 (13.6)
   Multi-vessel 66 (82.5) 112 (79.4) 81 (83.5) 447 (81.1)
   Limited** 8 (10.0) 16 (11.3) 4 (4.1) 29 (5.3)
Period     
   1991–1992 13 (16.3) 22 (15.6) 26 (26.8) 145 (26.3)
   1993–1994 23 (28.8) 27 (19.1) 14 (14.4) 114 (20.7)
   1995–1996 18 (22.5) 39 (27.7) 22 (22.7) 131 (23.8)
   1997–1998 17 (21.3) 33 (23.4) 21 (21.6) 113 (20.5)
   1999–2000 9 (11.3) 20 (14.2) 14 (14.4) 48 (8.7)
Hospital     
   1 11 (13.8) 46 (32.6) 8 (8.2) 108 (19.6)
   2 26 (32.5) 38 (27.0) 51 (52.6) 188 (34.1)
   3 35 (43.8) 43 (30.5) 15 (15.5) 121 (22.0)
   4 8 (10.0) 14 (9.9) 23 (23.7) 134 (24.3)
  1. *Death on wait lists means any pre-operative death while on the wait list for surgery; death after withdrawal means any pre-operative death after removal from the wait list without surgery; death during admission means any death after surgery during the same hospital admission; death after discharge means any death after hospital discharge.
  2. Within 5 years after registration date.
  3. Within 5 years after hospital discharge date, excluding two patients with unknown dates.
  4. §Congestive heart failure, diabetes mellitus, chronic obstructive pulmonary disease, rheumatoid arthritis, cancer.
  5. ||Peripheral vascular disease, cerebrovascular disease, dementia, peptic ulcer disease, hemiplegia, renal disease, or liver disease.
  6. Three- or two-vessel disease with stenosis of the proximal left anterior descending artery.
  7. **Two-vessel disease with no lesion in the proximal left anterior descending artery or one-vessel disease with stenosis of the proximal left anterior descending artery.