Risk Balancing of Cold Ischemic Time against Night Shift Surgery Possibly Reduces Rates of Reoperation and Perioperative Graft Loss
Table 6
Regression analysis of the risks for delayed graft function (). Shown are the results of univariable and multivariable binary regression analyses to determine the odds ratios of the investigated variables for the risk of delayed graft function (). Dialysis data were retrospectively available for 985 cases. Patients with perioperative graft nephrectomy and with discharge on dialysis were censored (). Analyzed were all remaining cases (). 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.]
54
53
6–88
3/0.3
<0.001
1.018
1.008–1.027
0.001
1.017
1.010–1.033
Donor BMI [kg/m2]
26
26
12–52
3/0.3
0.510
1.011
0.978–1.046
Not selected
Donor creatinine [μmol/l]
68
95
0–8408
0
0.776
1.000
1.000-1.000
Recipient age [yr.]
56
54
18–77
0
0.013
1.015
1.003–1.027
0.742
Not calculated
Recipient BMI [kg/m2]
25
25
15–38
14/1.6
0.001
1.068
1.029–1.109
0.001
1.074
1.031–1.119
CIT [min.]
785
846
125–2286
16/1.9
<0.001
1.002
1.001–1.002
<0.001
1.002
1.001–1.002
1st surgeon’s CUSUM
29
46
1–361
5/0.6
0.770
1.000
0.997–1.002
Not selected
Categorical variables
OR
95% CI
OR
95% CI
/%
Night shift surgery 3 AM–6 AM
16
0
0.303
0.515
0.146–1.822
Not selected
Recipient’s right fossa
555
0
0.013
0.689
0.514–0.924
0.065
Not calculated2
Right donor kidney
425
0
0.618
1.076
0.808–1.432
Not selected
Number of arteries
One
667
0
Reference
>one
216
0.432
1.146
0.822–1.599
Number of arterial anastomoses
One
802
0
Reference
Reference
>one
81
0.006
1.927
1.212–3.064
0.087
Not calculated
Number of veins
One
852
0
Reference
Not selected
>one
31
0.835
0.920
0.418–2.025
Number of venous anastomoses
One
882
0
Reference
>one
1
1.000
0.000
0.000
Stenting of ureter anastomosis
Nonstented
214
0
Reference
Stented
669
0.161
0.791
0.571–1.098
Not selected due to 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 = 23.458, DF = 23, and = 0.434.
