Risk Balancing of Cold Ischemic Time against Night Shift Surgery Possibly Reduces Rates of Reoperation and Perioperative Graft Loss
Table 3
Regression analysis of the risks for reoperation (). Shown are the results of univariable and multivariable binary regression analyses to determine the odds ratios of the investigated variables for the risk of reoperation () during primary hospitalization. Analyzed were all 1262 standard kidney transplants into nonpreoperated sites performed between 1 January 2000 and 31 October 2013. Included into risk-adjusted multivariable analyses were those 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
MV
OR
95% CI
OR
95% CI
/%
Donor age [yr.]
53
52
5–88
4/0.3
0.003
1.015
1.005–1.025
0.013
1.013
1.003–1.024
Donor BMI [kg/m2]
25
25
15–38
4/0.3
0.103
1.029
0.994–1.065
0.038
1.040
1.002–1.079
Donor creatinine [μmol/l]
70
91
0–8840
0
0.756
1.000
0.999–1.001
Not selected
Recipient age [yr.]
55
54
18–77
0
0.802
1.001
0.990–1.013
Recipient BMI [kg/m2]
25
25
15–38
35/2.8
0.521
1.013
0.975–1.052
CIT [min.]
858
916
125–2458
65/5.2
0.030
1.000
1.000–1.001
0.055
Not calculated
1st surgeon’s CUSUM
29
46
1–361
12/1.0
0.761
1.000
0.998–1.003
Not selected
Categorical variables
MV
OR
95% CI
OR
95% CI
/%
Night shift surgery 3 AM–6 AM
25
0
0.004
3.298
1.461–7.443
0.006
3.335
1.421–7.828
Recipient’s right fossa
740
0
0.279
1.180
0.875–1.593
Not selected
Right donor kidney
611
0
0.062
0.755
0.563–1.014
0.109
Not calculated
Number of arteries
One
947
0
Reference
Collinearity with number of arterial anastomoses
>one
315
0.258
1.208
0.871–1.677
Numbers of arterial anastomoses
One
1140
0
Reference
Reference
>one
122
0.083
1.489
0.950–2.335
0.142
Not calculated
Number of veins
One
1220
0
Reference
Not selected
>one
42
0.258
1.520
0.736–3.141
Numbers of venous anastomoses
One
1261
0
Reference
>one
1
1.000
0.000
0.000
Stenting of ureter anastomosis
Nonstented
380
5/0.4
Reference
Reference
Stented
877
0.003
0.628
0.463–0.853
0.001
0.579
0.415–0.809
Not selected for multivariable regression 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.
