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Table 1 Pre-operative clinical characteristics for OPCAB and ONCAB groups

From: Does off-pump coronary revascularization confer superior organ protection in re-operative coronary artery surgery? A meta-analysis of observational studies

Study (N)

N

Mean age

Previous MI

CHF/NYHA III/IV

Previous CVA/TIA

Hypertension

Diabetes

COPD

Renal impairment

Mean ejection fraction

Urgent/Emergent

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Off

On

Alamanni 2001 (123) [10]

53 (44%)

70 (56%)

66.4 (49–77)

NS

NS

NS

9 (17%)

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

0.56

NS

3 (5.6%)

NS

Bergsland 1998 (289) [11]

105 (36%)

184 (64%)

66.0

65.7

76 (75.4%)

144 (78.7%)

24 (22.9%)

33 (18.1%)

12 (11.4%)

18 (9.8%)

89 (84.3%)

144 (78.7%)

25 (23.8%)

59 (32.2%)

31 (29.5%)

42 (23%)

1 (1%)

2 (1%)

0.45

0.47

8 (7.6%)

12 (6.5%)

Czerny 2003 (118) [12]

44 (37%)

74 (63%)

66.9 ± 8.9

67.1 ± 7.7

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

0.53 ± 0.14

0.57 ± 0.11

0 (0.0%)

0 (0.0%)

Dewey 2001 (432) [13]

153 (35%)

279 (65%)

64.8 ± 10.7

64.4 ± 9.78

82 (53.6%)

153 (54.8%)

19 (12.4%)

34 (12.2%)

18 (11.8%)

26 (9.3%)

92 (60.1%)

184 (66%)

37 (24.2%)

71 (25.5%)

19 (12.4%)

26 (9.3%)

2 (1.3%)

2 (0.7%)

0.48 ± 0.11

0.47 ± 0.12

0 (0.0%)

0 (0.0%)

D’Ancona 2000 (581) [14]

274 (47%)

307 (53%)

66.8 41–85)

65.5 (37–85)

NS

NS

28 (10.2%)

21 (6.8%)

27 (9.9%)

32 (10.4%)

213 (77.7%)

229 (74.6%)

60 (21.9%)

82 (26.7%)

80 (29.2%)

73 (23.8%)

10 (3.8%)

2 (0.6%)

0.47 (0.13-0.84)

0.48 (0.10-0.76)

122 (44.5%)

171 (55.7%)

Gerli 2006 (132) [15]

41 (31%)

91 (69%)

67.0 ± 8.9

65.0 ± 7.6

28 (68.3%)

51 (56%)

13 (31.7%)

21 (23.1%)

3 (7.3%)

3 (3.3%)

NS

NS

6 (14.6%)

12 (13.2%)

8 (19.5%)

13 (14.3%)

7(17.1%)

9(9.9%)

NS

NS

NS

NS

Mishra 2008 (538) [16]

332 (62%)

206 (38%)

60.4 ± 5.8

61.2 ± 6.1

153 (46.1%)

101 (49%)

23 (6.9%)

10 (4.9%)

12 (3.6%)

5 (2.4%)

159 (47.9%)

108 (52.4%)

108 (32.5%)

64 (31.1%)

25 (7.5%)

17 (8.2%)

5 (1.5%)

3 (1.4%)

0.43 ± 0.07

0.43 ± 0.07

118 (35.5%)

91 (44.2%)

Morris 2007 (771) [17]

132 (17%)

639 (83%)

67.5 ± 10.3

66.2 ± 9.4

NS

NS

37 (28%)

111 (17.4%)

34 (25.8%)

120 (18.8%)

NS

NS

52 (39.4%)

203 (31.8%)

30 (22.7%)

96 (15%)

15 (11.4%)

38 (5.9%)

0.45 ± 0.13

0.46 ± 0.12

NS

NS

Schutz 2001 (40) [18]

20 (50%)

20 (50%)

63.2 ± 9.3

67.1 ± 6.6

NS

NS

NS

NS

NS

NS

14 (70%)

12 (60%)

2 (10%)

5 (25%)

NS

NS

NS

NS

0.53 ± 0.14

0.48 ± 0.15

0 (0.0%)

0 (0.0%)

Teodori 2000 (166) [19]

54 (33%)

112 (67%)

64.7 ± 8.5

62.7 ± 8.6

NS

NS

2 (3.7%)

1 (0.9%)

1 (1.8%)

10 (8.9%)

NS

NS

NS

NS

NS

NS

NS

NS

0.54 ± 0.13

0.53 ± 0.14

20 (37%)

36 (32%)

Tugtekin 2006 (195) [20]

35 (18%)

160 (82%)

66.9 ± 7.9

66.0 ± 8.1

17 (48.6%)

96 (40%)

1 (2.9%)

11 (6.9%)

NS

NS

NS

NS

12 (34.3%)

59 (36.8%)

2 (5.7%)

10 (6.2%)

NS

NS

0.52 ± 0.14

0.55 ± 0.16

12 (34.3%)

66 (41.3%)

Vohra 2008 (86) [21]

43 (50%)

43 (50%)

65.7 ± 6.9

64.7 ± 7.7

21 (48.8%)

23 (53.5%)

12 (27.9%)

18 (41.9%)

NS

NS

27 (62.8%)

34 (79%)

10 (23.2%)

14 (32.5%)

4 (9.3%)

5 (11.6%)

1 (2.3%)

1 (2.3%)

NS

NS

11 (25.6%)

9 (20.9%)

  1. OPCAB – off-pump coronary artery bypass; ONCAB – on-pump coronary artery bypass; MI – myocardial infarction; CHF – congestive heart failure (Ejection Fraction <40%); NYHA – New York Heart Association; CVA – cerebrovascular accident; TIA – transient ischaemic attack; COPD – chronic obstructive pulmonary disease; NS – not stated; (a) – statistical significance.