Risk Balancing of Cold Ischemic Time against Night Shift Surgery Possibly Reduces Rates of Reoperation and Perioperative Graft Loss
Table 4
Regression analysis of the risks for perioperative graft loss (). Shown are the results of univariable and multivariable binary regression analyses to determine the odds ratios of the investigated variables for the risk of perioperative graft loss () during primary hospitalization period. Analyzed were all 1262 cases with standard kidney transplantations into nonpreoperated sites between 1 January 2000 and 31 October 2013. Included into risk-adjusted multivariable analyses were only transplant variables with a value < 0.2 in univariable regression analyses.
Continuous variables
Descriptive statistics
Univariable binary regression
Risk-adjusted multivariable binary regression
Med
Mean
Range
OR
95% CI
OR
95% CI
/%
Donor age [yr.]
53
52
5–88
4/0.3
0.003
1.029
1.009–1.048
0.017
1.027
1.005–1.050
Donor BMI [kg/m2]
25
25
15–38
4/0.3
0.086
1.051
0.993–1.112
0.276
Not calculated
Donor creatinine [μmol/l]
70
91
0–8840
0
0.835
1.000
0.998–1.002
Not selected
Recipient age [yr.]
55
54
18–77
0
0.580
1.006
0.985–1.028
Recipient BMI [kg/m2]
25
25
15–38
35/2.8
0.032
1.080
1.007–1.158
0.016
1.103
1.019–1.194
CIT [min.]
858
916
125–2458
65/5.2
0.059
1.001
1.000–1.001
0.481
Not calculated
1st surgeon’s CUSUM
29
46
1–361
12/1.0
0.615
1.001
0.997–1.006
Not selected
Categorical variables
OR
95% CI
OR
95% CI
/%
Night shift surgery 3 AM–6 AM
25
0
0.004
5.131
1.711–15.389
0.003
5.543
1.758–17.47
Recipient’s right fossa
740
0
0.500
0.844
5.15–1.381
Not selected
Right donor kidney
611
0
0.715
0.913
0.559–1.489
Number of arteries
One
947
0
Reference
Collinearity with number of arterial anastomoses
>one
315
0.043
1.716
1.017–2.893
Number of arterial anastomoses
One
1140
0
Reference
Reference
>one
122
0.060
1.853
0.974–3.525
0.069
Not calculated
Number of veins
One
1220
0
Reference
Not selected
>one
42
0.963
0.967
0.231–4.053
Numbers of venous anastomoses
One
1261
0
Reference
>one
1
0.999
0.000
0.000
Stenting of ureter anastomosis
Nonstented
380
5/0.4
Reference
Stented
877
0.309
1.348
0.759–2.395
Not selected because of a value > 0.2 in univariable analyses. Odds ratios and 95% CI were not calculated because of a value > 0.05 in multivariable analyses. Little’s MCAR test: Chi-Square = 31.909, DF = 33, and = 0.521.
