Table 4.

Multivariate analysis of risk factors for any adverse event (AAE) and unplanned hospital readmission after ankle fracture surgery as related to patient demographics and comorbidities

	Any Adverse Event			Hospital Readmission
	OR Coef.	95% OR	P-Value	OR Coef.	95% OR	P-Value
Age (1-year intervals)	1.023	1.018–1.028	< 0.001	1.015	1.008–1.022	< 0.001
BMI	1.051	1.006–1.025	< 0.001	0.998	0.987–1.009	0.776
Male Sex	0.983	0.853–1.133	0.812	1.012	0.851–1.205	0.888
Operative Time (1 min. intervals)	1.00	0.999–1.002	0.113	1.002	1.000-1.003	0.040
ASA Class	1.579	1.405–1.776	< 0.001	1.762	1.523–2.038	< 0.001
Partially Dependent Functional Status	1.735	1.339–2.248	< 0.001	1.863	1.377–2.521	< 0.001
Fully Dependent Functional Status	2.509	1.223–5.151	0.012	3.066	1.377–6.829	0.006
Current Smoker	1.295	1.098–1.527	0.002	1.667	1.373–2.022	< 0.001
Congestive heart failure	2.993	2.073–4.321	< 0.001	1.492	0.967-2.300	0.070
Dialysis	1.947	1.296–2.985	0.002	3.304	2.154–5.066	< 0.001
Steroid use	1.298	0.927–1.819	0.129	2.144	1.527–3.010	< 0.001
Hypertension	0.997	0.849–1.172	0.974	1.266	1.033–1.552	0.022
Bleeding disorder	1.489	1.168–1.897	0.001	1.711	1.299–2.252	< 0.001
Preoperative transfusion	3.037	1.713–5.382	< 0.001	0.999	0.419–2.387	0.999
Diabetes	1.254	1.061–1.483	0.008	1.494	1.225–1.821	< 0.001
COPD	1.522	1.199–1.931	< 0.001	1.599	1.217-2.100	< 0.001

BMI: body mass index; ASA: American Society of Anesthesiologists; Hypertension: hypertension requiring medication; Dialysis: acute or chronic renal failure requiring dialysis within 2 weeks of indexed procedure; COPD: chronic obstructive pulmonary disease