Table 4.

Risk factors for hospital readmissions.

	OR	95%CI	p-value
Univariate
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
Multivariate
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