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Table 1 Baseline characteristics of study groups

From: Mid-term outcomes for Endoscopic versus Open Vein Harvest: a case control study

Characteristic Total
(n = 271)
Open Harvesting
(n = 182)
Endoscopic Harvesting
(n = 89)
p value
Age - yrs 66.1 ± 9.6 67.5 ± 9.7 66.0 ± 9.6 0.93
Male - no. (%) 223 (82) 145 (80) 78 (88) 0.13
Body Mass Index 28 ± 4.5 28 ± 4.3 29 ± 4.9 0.12
Hypertension - no. (%) 207 (76) 139 (76) 68 (85) 0.56
Diabetes - no. (%)     0.31
   No diabetes 208 (77) 144 (79) 64 (72)  
   Diet Controlled 9 (3) 4 (2) 5 (6)  
   Tablet Controlled 41 (15) 27 (15) 14 (16)  
   Insulin Dependent 13 (5) 7 (4) 6 (7)  
Hypercholesterolaemia - no. (%) 235 (87) 168 (92) 67 (75) <0.001
Previous MI - no./total (%)     0.26
   Last MI <30 days ago 27/140 (19) 22/97 (23) 5/43 (12)  
   Last MI 31 - 90 days ago 18/140 (13) 13/97 (13) 5/43 (12)  
   Last MI >90 days ago 95/140 (68) 62/97 (64) 33/43 (77)  
Prior PCI - no. (%)     0.64
   None 248 (92) 166 (91) 83 (93)  
   PCI >24 hrs prior to CABG 22 (8) 16 (9) 6 (7)  
   PCI <24 hrs prior to CABG 0 (0) 0 (0) 0 (0)  
Previous stroke - no. (%) 23 (8) 16 (9) 7 (8) 1.00
Renal Failure - no. (%) 2 (1) 0 (0) 2 (2) 0.11
Peripheral Vascular Disease - no. (%) 40 (15) 26 (14) 14 (16) 0.86
Pulmonary Disease - no. (%)     0.46
   None 240 (89) 159 (87) 81 (91)  
   Asthma 16 (6) 13 (7) 3 (3)  
   COPD 15 (5) 10 (4) 5 (6)  
Smoking - no. (%)     0.75
   Never 91 (34) 60 (33) 31 (35)  
   Ex-smoker 145 (53) 100 (55) 45 (50)  
   Currently smoking 35 (13) 22 (12) 13 (15)  
CCS grade - no. (%)     0.55
   I 53 (20) 41 (23) 12 (13)  
   II 102 (38) 68 (37) 34 (38)  
   III 98 (36) 66 (36) 32 (36)  
   IV 27 (10) 20 (11) 7 (8)  
NYHA grade - no. (%)     0.64
   I 96 (35) 72 (40) 24 (27)  
   II 117 (43) 79 (43) 38 (43)  
   III 82 (30) 57 (31) 25 (28)  
   IV 11 (4) 7 (4) 4 (4)  
LMS disease >50% - no. (%) 68 (25) 37 (20) 31 (35) 0.0165
Left Ventricular Function - no. (%)     0.03
   Poor <30% 10 (4) 7 (4) 3 (3)  
   Fair 31-49% 44 (16) 22 (12) 22 (25)  
   Good >50% 217 (80) 153 (84) 64 (72)  
Number of distal grafts 3.4 ± 0.8 3.5 ± 0.8 3.3 ± 0.9 0.24
Parsonett Score 8.3 ± 6.6 8.6 ± 6.9 8.2 ± 6.4 0.67
EuroSCORE 3.4 ± 2.3 3.4 ± 2.5 3.2 ± 1.9 0.50
Bypass time - min 83.3 ± 23.9 81.9 ± 22.5 86.3 ± 26.5 0.15
Cross-clamp time - min 64.9 ± 18.8 64.0 ± 17.7 66.8 ± 20.9 0.24
Operative Priority - no. (%)     0.0014
   Elective 232 (86) 146 (80) 86 (97)  
   Urgent 36 (13) 33 (18) 3 (3)  
   Emergency 3 (1) 3 (2) 0 (0)