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Table 1 Patient characteristics at index admission for PCI (excluding angioplasty only) and CABG during 2000-2004

From: Impact of the introduction of drug eluting stents on clinical outcomes in patients undergoing percutaneous and surgical coronary artery revascularisation procedures in Western Australia

 

2000

2001

2002

2003

2004

Total

Number of patients (col%)

2669

2652

2765

2944

3088

14118

  BMS

1630 (61.1)

1725 (65.0)

1370 (49.6)

353 (12.0)

96 (3.1)

5174

  DES ¶

0

0

486 (17.6)

1733 (58.9)

2200 (71.2)

4419

  CABG

1039 (38.9)

927 (35.0)

909 (32.9)

858 (29.1)

792 (25.6)

4525

Age

      

  mean (SD)

63.7 (11.1)

63.8 (11.1)

64.2 (11.7)

64.0 (11.8)

64.3 (11.6)

64.0 (11.5)

  range

27-93

30-92

27-94

26-93

30-93

26-94

Males (%)

76.0

77.0

76.4

76.6

75.6

76.3

Main diagnosis, MI (%) †

550 (20.6)

588 (22.2)

798 (28.9)

901 (30.6)

998 (32.3)

3835 (27.2)

Prior disease, no. (%) ‡

      

  MI

572 (21.4)

511 (19.3)

532 (19.2)

583 (19.8)

509 (16.5)

2707 (19.2)

  Stroke

51 (1.9)

41 (1.6)

37 (1.3)

30 (1.0)

44 (1.4)

203 (1.4)

  Diabetes

434 (16.3)

469 (17.7)

493 (17.8)

572 (19.4)

558 (18.1)

2526 (17.9)

  Renal failure

72 (2.7)

71 (2.7)

84 (3.0)

124 (4.2)

114 (3.7)

465 (3.3)

  Congestive heart failure

222 (8.3)

182 (6.9)

192 (6.9)

225 (7.6)

191 (6.2)

1012 (7.2)

  COPD

223 (8.4)

204 (7.7)

163 (5.9)

149 (5.1)

132 (4.3)

871 (6.2)

  PVD

156 (5.8)

156 (5.9)

126 (4.6)

174 (5.9)

144 (4.7)

756 (5.4)

Charlson score (mean) §

1.38

1.36

1.31

1.39

1.31

1.35

Number of vessels treated, no. (%) ††

      

  single

1688 (65.4)

1704 (66.3)

1829 (67.6)

1954 (67.9)

2047 (68.2)

9222 (67.1)

  multi-vessel

891 (34.6)

867 (33.7)

876 (32.4)

925 (32.1)

956 (31.8)

4515 (32.9)

Patients with venous grafts in CABG cohort, n (%) #

853 (82.1)

755 (81.5)

746 (82.1)

722 (84.2)

675 (85.2)

3751 (82.9)

Patients with arterial grafts in CABG cohort, n (%) #

924 (88.9)

816 (88.0)

795 (87.5)

768 (89.5)

712 (89.9)

4015 (88.7)

Deaths within 28 days, no. (%)

53 (2.0)

45 (1.7)

58 (2.1)

41 (1.4)

80 (2.6)

277 (2.0)

Hospital type: public, no. (%)

1728 (64.7)

1668 (62.9)

1674 (60.5)

1791 (60.8)

1828 (59.2)

8689 (61.6)

Admission type: emergency, no. (%)

1008 (37.8)

1013 (38.2)

1100 (39.8)

1223 (41.5)

1366 (44.2)

5710 (40.4)

  1. CABG coronary artery bypass graft surgery, PCI percutaneous coronary intervention, BMS bare metal stent, DES drug eluting stent; col%, column percent, SD standard deviation, MI myocardial infarction.
  2. ¶ DES are with or without BMS, and were first used in mid-2002 in Western Australia.
  3. † Significant increasing trend during 2000-2004 in the proportion of MI as main discharge diagnosis (p<0.0001; Cochran-Armitage trend test).
  4. ‡ History of admissions for disease within 5 years of index admission for CABG or PCI. COPD, chronic obstructive pulmonary disease; PVD, peripheral vascular disease.
  5. § Charlson comorbidity score based on comorbidities within previous 5 years up to and including index admission, but excluding MI in the index admission. Mean Charlson score significantly higher in index CABG patients (p<0.0001 for each year; Wilcoxon two-sample test using Normal approximation with continuity correction).
  6. †† For CABG these were identified from ICD codes for procedures recorded in the Hospital Morbidity Data Collection. Some data were missing for both PCI and CABG.
  7. # Venous grafts are saphenous or other vein grafts; arterial grafts are internal mammary artery (left or right), radial artery or epigastric artery grafts.