Risk Factors for Postoperative Urinary Tract Infections in Patients Undergoing Total Joint Arthroplasty

Table 1

Preoperative characteristics.

Characteristic	No UTI		UTI		value
Number of patients	114391	98.9%	1239	1.1%
Age (years) (mean, SD)	66.54, 10.3		70.89, 9.8		<0.001
<59	28165	99.4%	160	0.6%
60–69	40511	99.1%	353	0.9%
70–79	32296	98.6%	453	1.4%
80+	12717	98.0%	258	2.0%
BMI (mean, SD)	31.8, 7.1		32.1, 7.4		0.443
Underweight	681	98.6%	10	1.4%
Normal	15569	98.9%	166	1.1%
Overweight	34871	99.0%	349	1.0%
Obese (Class 1)	30823	98.9%	348	1.1%
Obese (Class 2)	18441	98.9%	201	1.1%
Obese (Class 3)	13787	98.8%	162	1.2%
Sex					<0.001
Male	45263	99.2%	343	0.8%
Female	68968	98.7%	895	1.3%
Race					0.165
White	91973	99.0%	967	1.0%
Black	7190	98.7%	92	1.3%
Asian	2024	99.2%	16	0.8%
Other/unknown	4533	98.8%	53	1.2%
Current smoker	11107	99.3%	82	0.7%	<0.001
Steroid use	3229	97.9%	68	2.1%	<0.001
Comorbidities
Diabetes mellitus					<0.001
Non-insulin dependent	13465	98.7%	171	1.3%
Insulin-dependent	4122	98.2%	74	1.8%
Disseminated cancer	143	97.3%	4	2.7%	0.074
Dyspnea	7528	98.5%	115	1.5%	<0.001
COPD	4163	98.4%	68	1.6%	0.001
Hypertension	72760	98.8%	916	1.2%	<0.001
Open wound/wound infection					0.002
Congestive heart failure < 30 days	267	98.2%	5	1.8%	0.223
Bleeding disorders	2952	98.2%	53	1.8%	<0.001
Previous PCI/cardiac surgery	3311	98.1%	64	1.9%	0.006
Previous TIA/stroke	1793	98.1%	35	1.9%	0.04
ASA class					<0.001
1, 2	63731	99.2%	513	0.8%
3, 4, 5	50541	98.6%	723	1.4%
Functional status					<0.001
Dependent	2616	98.2%	49	1.8%
Independent	111250	98.9%	1185	1.1%

denotes significance.