Table 4 Risk factors for hospital readmissions.

Males/Females

1.08

0.74–1.58

0.694

Age

1.00

0.99–1.01

0.371

BMI with every kg/m²

1.01

1.00–1.02

0.008

Obesity

1.38

0.72–2.65

0.331

ASA with every grade higher

1.44

1.00–2.07

0.049

Smoking

1.10

0.65–1.84

0.732

Diabetes

1.92

0.83–4.47

0.129

Symptoms <48 h vs. >48 h

1.01

0.95–1.07

0.838

Alvarado

1.07

0.96–1.19

0.215

Leukocytosis

1.01

0.99–1.03

0.379

CRP >100

1.92

1.20–3.09

0.007

No of appendectomies/year in department

1.84

1.15–2.95

0.011

Specialist vs. resident

0.50

0.34–0.73

<0.001

Operative time

1.00

0.99–1.01

0.139

Clipping

0.92

0.63–1.35

0.680

Suturing/ligature

1.74

1.04–2.91

0.035

Stapler

0.33

0.05–2.42

0.278

Endoloop

0.97

0.64–1.48

0.896

Röder loop

0.66

0.30–1.43

0.290

Complicated vs. uncomplicated

1.81

1.22–2.66

0.003

Intraoperative adverse events

0.43

0.06–3.13

0.405

Postoperative morbidity

19.27

12.81–28.99

<0.001

Conversions

2.03

1.12–3.68

0.019

Reinterventions after primary procedure

43.00

26.85–68.87

<0.001

LOS

1.05

1.02–1.09

0.003

ASA

0.99

0.55–1.78

0.964

CRP >100

1.13

0.52–2.43

0.759

>50 appendectomies/year in department

1.17

0.55–2.51

0.680

Specialist vs. resident

0.51

0.27–0.97

0.039

Complicated vs. uncomplicated

0.63

0.28–1.41

0.260

Perioperative morbidity

10.33

4.27–25.00

<0.001

Conversions

0.88

0.40–2.96

0.876

Reintervention

5.62

2.17–14.54

<0.001