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Elsayed et al. Vessel Plus 2018;2:39 I http://dx.doi.org/10.20517/2574-1209.2018.65 Page 7 of 11

Table 6. Relation between method of reconstruction and preoperative characteristics
Method of reconstruction Test of Sig P
LIMA (n = 22) No. (%) LIMA + vein (n = 8) No. (%)
Gender 2 FE
Males 21 (95.5) 6 (75.0) χ = 2.727 P = 0.166
Age
Mean ± SD 59.4 ± 7.69 58.75 ± 9.27 T = 0.180 0.861
Median 60.0 (40.0-69.0) 62.0 (42.0-67.0)
Cardiac profile
2
Left main 4 (18.2) 1 (12.5) χ = 0.136 FE P = 1.000
2
Unstable angina 20 (90.9)0 6 (75.0) χ = 1.285 FE P = 0.284
NYHA class
I 0 (0.0) 0 (0.0) 2 FE
II 10 (45.5) 5 (62.5) χ = 0.682 P = 0.682
III 12 (54.5) 3 (37.5)
2
Previous MI 14 (63.6) 4 (50.0) χ = 0.455 FE P = 0.678
Ejection fraction
Mean ± SD 50.27 ± 8.59 53.88 ± 10.23 T = 0.967 0.342
Median 48.0 (35.0-70.0) 54.0 (40.0-70.0)
Coronary risk factors
2
Hypertension 19 (86.4) 8 (100) χ = 1.212 FE P = 0.545
2
Smoking 13 (59.1) 3 (37.5) χ = 1.099 FE P = 0.417
2
Dyslipidemia 5 (22.7) 5 (62.5) χ = 4.176 FE P = 0.078
2
Diabetes mellitus 13 (59.1) 6 (75.0) χ = 0.639 FE P = 0.672
2
Insulin use 3 (13.6) 1 (12.5) χ = 0.007 FE P = 1.000
Comorbidities
2
COPD 8 (36.4) 1 (12.5) χ = 1.591 FE P = 0.374
Renal.impairment 0 (0.0) 0 (0.0) - -
2
Prev.CVA 1 (4.5) 0 (0.0) χ = 0.376 FE P = 1.000
PVD 1 (4.5) 1 (12.5) χ = 0.597 FE P = 0.469
2
χ : Chi square test; FE: fisher exact; T: Student t-test; P: P value for comparing between the two groups; NYHA: New York Heart
2
Association; COPD: chronic obstructive pulmonary disease; CVA: cerebrovascular accident; PVD: peripheral vascular disease
Table 7. Comparison between both groups of reconstruction
Method of reconstruction
Variables Test of Sig P
LIMA (n = 22) LIMA + vein (n = 8)
Cross clamp time (min)
Mean ± SD 58.9 ± 18.80 65.6 ± 14.74 T = 0.910 0.371
Median (range) 60.0 (28.0-100.0) 70.0 (40.0-85.0)
Length of reconstruction (cm)
Mean ± SD 5.64 ± 0.73 8.31 ± 1.16 T = 7.564 < 0.001*
Median (range) 5.50 (5.0-7.0) 8.0 (7.0-10.0)
Time of ventilation (h)
Mean ± SD 15.82 ± 15.82 8.0 ± 5.50 U = 68.00 0.344
Median (range) 6.0 (3.0-110.0) 4.50 (4.0-17.0)
Inotropic support (days)
Mean ± SD 2.41 ± 1.01 2.38 ± 0.74 U = 85.50 0.889
Median (range) 2.0 (1.0-5.0) 2.0 (2.0-4.0)
2
Myocardial infarction 1 (4.5) 1 (12.5) χ = 0.597 FE P = 0.469
2
Atrial fibrillation 6 (27.3) 1 (12.5) χ = 0.716 FE P = 0.638
2
Bleeding requiring reexploration 1 (4.5) 1 (12.5) χ = 0.597 FE P = 0.469
2
Mortality 1 (4.5) 0(0.0) χ = 0.376 FE P = 1.000
2
Patency rate* 20 (95.2) 7 (87.5) χ = 0.540 FE P = 0.483
2
Postoperative angina* 2 (9.5) 2 (25.0) χ = 1.167 FE P = 0.300
2
*One case of mortality (n = 29). χ : Chi square test; FE: fisher exact; T: Student t-test; P: P value for comparing between the two groups; U:
Mann Whitney test