Table 2 Unadjusted postoperative complications and comparisons between diabetic groups using binary logistic regression

Non-DM (n = 5944) %

NIDDM (n = 922) %

IDDM (n = 380) %

DM vs non-DM p value

OR; 95% CI

 Readmission

2.7

4.2

5.5

< 0.001

1.724 (1.274–2.333)

 Non-routine discharge

10.5

13.1

15.2

< 0.001

1.386 (1.164–1.651)

 Postoperative SSI

0.4

0.3

0.5

0.919

0.951 (0.362–2.497)

 Postoperative renal failure

0.03

0.11

0

0.5

2.284 (0.207–25.203)

 Postoperative myocardial infarction

0.25

0.22

0.53

0.813

1.142 (0.381–3.421)

 Postoperative pneumonia

0.42

0.76

0.53

0.505

1.270 (0.629–2.566)

 Postoperative pulmonary embolism

0.32

0.33

0

0.54

0.684 (0.203–2.305)

 Postoperative transfusion due to bleeding

2.6

2.9

2.6

0.505

1.130 (0.788–1.620)

NIDDM vs non-DM p value

OR; 95% CI

IDDM vs non-DM p value

OR; 95% CI

NIDDM vs IDDM p value

OR; 95% CI

 Readmission

0.012

1.58 (1.103–2.252)

0.002

2.088 (1.309–3.330)

0.312

0.755 (0.438–1.302)

 Non-routine discharge

0.012

1.3 (1.059–1.596)

0.001

1.602 (1.206–2.128)

0.217

0.812 (0.583–1.130)

 Postoperative SSI

0.724

0.805 (0.242–2.679)

0.718

1.305 (0.307–5.543)

0.598

0.617 (0.103–3.707)

 Postoperative renal failure

0.339

3.226 (0.292–35.611)

0.995

0

0.994

0

 Postoperative myocardial infarction

0.773

0.805 (0.185–3.509)

0.371

1.960 (0.449–8.557)

0.375

0.411 (0.058–2.927)

 Postoperative pneumonia

0.194

1.741 (0.754–4.023)

0.801

1.204 (0.285–5.093)

0.647

1.446 (0.299–6.992)

 Postoperative pulmonary embolism

0.957

0.967 (0.287–3.260)

0.994

0

0.994

5,273,569 (0)

 Postoperative transfusion due to bleeding

0.009

1.759 (1.152–2.685)

0.109

1.674 (0.891–3.144)

0.891

1.051 (0.518–2.133)